Rev Performance EMS tuner review

[x52gnr]

  So finally got to get some ride time in today about 50 miles worth. First off the install was easy. I redid the free air calibration after watching the video on you tube so that the 2 lights were just barely blinking and started the bike. This time it took several cranks to start it but I think its because I was goofing with some other stuff and the battery was a bit on the low side.. Any way once it fired up it ran a bit rough for about 30 seconds then settled into gradually smoother and better idle. I let it run about 10 minutes while I dried it after washing, shut it down and went to put on some riding gear. The second start was immediate and it set into a smooth idle. I ran a 50 mile loop at varying speeds in various gears, both hills and flat. I can say without a doubt that the bike runs and pulls better than it ever has, the throttle response is crisp, smooth and strong. There was no back firing, no hesitation and no funny noises lol.. I purposely did some heavy roll ons in5th and 6th  to the point of almost lugging the motor and though I got some very light pinging it was nothing even close to what I experienced under the same conditions with the Thundermax. I must say my bike is running the best it ever has both as stock and now with the 103 build  i did a couple winters ago. I cant address mileage differences till I get some more miles on it but so far I am very happy with the results....After returning to the garage i shut it down and did several restarts one after the other with no clunking, spitting or coughing.  I will add more as I get more miles on it..Please don't turn this into a debate thread I would like to keep it to feedback and experiences with this unit...

[dennish]

I can't wait mine should be in next week.

[Dennis The Menace]

G, I admit to a poo eatin grin when I took mine out after initial install.  Now you know the feeling.  lol

Its going on my new bike, too.  Glad you are enjoying it!

[wurk_truk]

Cool!

[Yo J]

Debating the switch myself... Plz keep us posted on your MPGs. Any chance of a Dyno Chart w/AFR?

[x52gnr]

I may have a dyno done at some point, if so it would be later in the spring or summer. I will keep you posted...

[x52gnr]

Just a few more notes, I have been getting several emails regarding why i switched from the Tmax etc...I can say that I was pleased with the thundermax and the support i got from them when I did have any issues...I would not hesitate to rec the Thundermax at all. I am a chronic tinkerer by nature and i found myself constantly fiddling with timing and fuel curves and what not that it took away from my overall riding experience...I know with the EMS tuner that i cant fiddle and there fore my anxiety level has dropped and I am just enjoying the ride.  I am not a tweak every bit of torque or horsepower kinda guy, i look at the overall riding experience in the types of conditions and situations that I ride in.. I think so far that this product has solved all those issues for me but only more seat time will tell...I am hopefully optimistic...

[2tired]

Good to hear a users actual experience with the product without that "debate" you referred to.  I am looking forward to getting one for the early EFI when they become available.

[mike 120]

Finally got to ride today, first ride since EMS install, build is Jims 120, 10.8-1 comp, 57TB, V-Rod inj. T-Man 650 cams, D&D Boarzilla, very impressed , bike pulls strong, low speed driveability best it has been, engine smooth at cruising speed, starts right up idles smoothly. 46 miles ridden, so far I'm a believer.

[ultra 08]

I have to ask a dumb question is this a new tuner that just came out or has it been out for a while? I do have to say until last fall this was all Greek to me until I put a set of cams in my bike and I hadn't heard of this tuner until now but I live in a small world.

[mike 120]

Fairly new, I believe it came out last fall, not sure exactly when.

[wurk_truk]

Mike120,

Your experiences with the EMS are really good news.  Please post once and awhile as the year goes by, and tell us what you think.  I have talked to Brian, at Rev Perf, on how this thing works... in general terms... and I am going to start being impressed pretty soon.  SO many areas of the country have NO good tuning help available and this thing is tits for that! 

Your build is NOT some Stage 1, and I want to see if you are still as happy with the EMS in 6 months as you are now.  I bet you will be!!!

[mike 120]

Wurk, this bike had run well before after spending a lot of time fiddling with TSII+, but there was one area around 2.5k light load, small tp area that it would always have what felt like a skip, road in that area a lot and it never happened, that made it worth it to me, the bonus is it's smoother and really seems more eager to pull very hard,I will give updates, hoping that I remain as satisfied as I am now.
Mike

[rbabos]

Wurk, this bike had run well before after spending a lot of time fiddling with TSII+, but there was one area around 2.5k light load, small tp area that it would always have what felt like a skip, road in that area a lot and it never happened, that made it worth it to me, the bonus is it's smoother and really seems more eager to pull very hard,I will give updates, hoping that I remain as satisfied as I am now.
Mike

Ah yes the dreaded light load skp,miss , jerk. Took me forever to tune that out with a home tune. Good to hear the EMS seems to remove this annouyance.
Ron

[x52gnr]

My experiences as well, areas that I just could never get right with the T-max were fixed by the ems....

[vanwill]

Ron, out of curiosity, what did you basically do to tune out the very light throttle 2200 RPM "gurgle".  I never did get mine out.

[rbabos]

Ron, out of curiosity, what did you basically do to tune out the very light throttle 2200 RPM "gurgle".  I never did get mine out.

Threw more fuel at it in the problem rpms. My problem 1250-2200 area was more of a miss, skip, with a felt jerk in the ride. Tried upping the ve's with some success but in the end the afr table was fattened in those areas. This put me into open loop in those regions. High heat situations brought the problem back sometimes (long idling and city driving) and relocating the iat solved that problem as well.
Hoping the newer MT8 cals will tune better without going to such extremes.
Ron

[slack20]

hey men got a question just got my new performance tuner back from revolution with all the mods done to the 2010 flhx went to fire it thurs after several attempts noticed fuel pump not workin got josh on the phone he said my bad the e.c.m didnt take the flash is this possible should have it back tues hope all is well not bashing anyone just asking thanks

[Dennis The Menace]

Slack, not sure how they flash the ECM, but I am sure that despite their best efforts, there could be a situation where a specific ECM didnt take a flash.  That would be a PITA to have to send it back, but I expect RP paid shipping both ways for you.  I have had a great customer service experience in dealing with them, so I am sure they will take care of you.

[slack20]

yes they did pay shippin my question was would that not let fuel pump work im guessing it wouldnt

[Hornhonker]

Was there anything other than a stock HD flash in the ECU when you sent it ?

[Coyote]

yes they did pay shippin my question was would that not let fuel pump work im guessing it wouldnt

The fuel pump is powered from the system relay which is controlled by the ECM. If the ECM is not running, no power to the fuel pump. Rev Perf should have tested the ecm after flashing it IMO.

[slack20]

thanks

[dale3dale8]

Anything new to say about the unit, pro and con??

[hrdtail78]

Does anybody know if the dealerships can access the ECM after Rev Perf does their thing?

[cody]

2009 Street Glide. Screamin' Eagle Heavy Breather, Cycle Shack slip-on mufflers. Only have 300 miles since EMS installation. Bike runs excellent. No rideability issues at all. Back road riding, going through small towns where I was getting 43 mpg last year I am getting 46 mpg although I don't think 300 miles is a long enough test. Haven't gone on a long thruway ride yet. Will post when I get more miles on.

[cody]

hrdtail78
I can tell you that there is now a different ecm calibration ID number in my ecm when I got it back from Rev Perf

[Sc00ter]

Does anybody know if the dealerships can access the ECM after Rev Perf does their thing?

From the Rev, Perf. website frequently asked questions...

"Does the RP Precision system disable or interfere with the ability of the dealerships to trouble shoot and/or diagnose with the Scan Tool? No. The ECM will function completely normal and will produce DTC codes, logic diagrams and diagnostic reports as normal. "

[mike 120]

I presently have about 400 miles on my 120 with ems, very happy with it, rode today with temps in upper 80's, couldn't help myself, had to check head temps with IR gun, 290 front, 295 rear, both at plug base, fuel mileage 43 mpg, and that's getting into it not just cruising. Very satisfied.
Mike 

[Sc00ter]

I presently have about 400 miles on my 120 with ems, very happy with it, rode today with temps in upper 80's, couldn't help myself, had to check head temps with IR gun, 290 front, 295 rear, both at plug base, fuel mileage 43 mpg, and that's getting into it not just cruising. Very satisfied.
Mike 

Any idea what your oil temperature is? 

[mike 120]

I presently have about 400 miles on my 120 with ems, very happy with it, rode today with temps in upper 80's, couldn't help myself, had to check head temps with IR gun, 290 front, 295 rear, both at plug base, fuel mileage 43 mpg, and that's getting into it not just cruising. Very satisfied.
Mike 

Any idea what your oil temperature is?

Yes, using a oil tank dipstick, which I verified accuracy in boiling water, backroads 2k-3k rpm about 210, steady highway cruising a bit over 3k, it will creep up to 235 , this is with temps in mid 80's

[Sc00ter]

I presently have about 400 miles on my 120 with ems, very happy with it, rode today with temps in upper 80's, couldn't help myself, had to check head temps with IR gun, 290 front, 295 rear, both at plug base, fuel mileage 43 mpg, and that's getting into it not just cruising. Very satisfied.
Mike 

Any idea what your oil temperature is?

Yes, using a oil tank dipstick, which I verified accuracy in boiling water, backroads 2k-3k rpm about 210, steady highway cruising a bit over 3k, it will creep up to 235 , this is with temps in mid 80's

I see about the same temps...

[Thumper Buttercup]

We'll we are breaking in our bike and have a bit over 240 miles so far, I'm getting a
bit of heat off the rear cylinder when going down the road and I'm running Rush
ceramic pipes.

Just stopping my front was reading about 280 but the rear is reading 320.  This
reading was taken with a IR right after shutdown.

My plugs are looking a bit dirty, we are averaging about 37 mpg, this is mostly 50-58 mph
with a 20 mile run at 65 mph.

I talked to Rev today and they have not done many bikes with the 48 cams.  It's
looking like we will have to dyno to get a AFR on the bike after it's broke in to
get the bike figured out.  We'll give her a bit more miles, they did say they probably
had our idle too rich.

I also noticed this windy weekend that every now and then when the wind was right
I would smell fuel.

When doing the initial heat cycles the front only got up to about 165 degrees and the
rear stayed about 10-15 degrees cooler.

The bike runs great and pulls hard, we've kept the rpm's under 3000 for the break in.

[PanHeadRed]

>I was pleased with the thundermax and the support i got .............. my anxiety level has dropped and I am just enjoying the ride.<


and 

[Thumper Buttercup]

I want to make a statement here on our setup, looks like we are having an
issue with our exhaust coming loose.  We are pulling our exhaust and reinstalling
everything after cleaning everything up.  We are adding lock washers to help
keep our nuts tight.  We'll update as soon as we get it back together and get some
good weather to ride in.

[cody]

What exhaust are you using ?   What style gaskets ?

[Thumper Buttercup]

Hey cody,

   We are using Rush ceramic headers, we installed the flat style gaskets,
we are replacing them with Harley's wedge gaskets.  The headers were
installed with new clamps and nuts.

[cody]

I believe the Rush headers and early D&D are among the pipes that need the O2 bungs trimmed down so the sensor sits more in the exhaust. (Wondering if this is part of your rich running issue)   I have a D&D that I just put on. Don't think it is an early made pipe but looking at a diagram that Steve Cole posted it looked like the bungs needed some trimming so I did.
The D&D also uses the flat gaskets (I used Screamin' Eagle) which leaked. I then used H-D oem gaskets which sealed but I was only able to get the stud nut on to being flush with the end of the stud. I am hoping that will be enough to keep the nut locked on. After one heat cylcle I was able to move one nut at each port only slightly. After 150 mile ride they are still tight.

[Thumper Buttercup]

Ours were long also, we checked them before we were ready to install and found it.  We shipped the headers to Rev-Perf and had them change out the bungs, Rush had also left part of the exhaust pipe in the 02 area and they took care of that also.

We are pulling the exhaust today, but with all the damn rain might not get out until next week.

[tracerbob]

I'm impressed with this product and just about ready to pull the trigger on one.  Who has the best price?

[gabbyduffy]

I believe the Rush headers and early D&D are among the pipes that need the O2 bungs trimmed down so the sensor sits more in the exhaust. (Wondering if this is part of your rich running issue)   I have a D&D that I just put on. Don't think it is an early made pipe but looking at a diagram that Steve Cole posted it looked like the bungs needed some trimming so I did.
The D&D also uses the flat gaskets (I used Screamin' Eagle) which leaked. I then used H-D oem gaskets which sealed but I was only able to get the stud nut on to being flush with the end of the stud. I am hoping that will be enough to keep the nut locked on. After one heat cylcle I was able to move one nut at each port only slightly. After 150 mile ride they are still tight.

               I also had to trim my D&D 02 bungs to get the 02 sensors to get a good read with the percision ems. My bike ran real rich until I shaved the bungs. After I fixed the bungs the bike ran great.

[mike 120]

Gabby, just curious as to how you determined it being real rich? Fuel mileage, driveability? Because I have a Boarzilla bought in 2008 never touched the bungs and get low to mid 40's depending on my right hand.
Mike

[cody]

Runs good, MPG not as adveritised.

[Sc00ter]

120r motor.... runs fantastic...  40 mpg at 70 mph highway speeds.   

[gabbyduffy]

Gabby, just curious as to how you determined it being real rich? Fuel mileage, driveability? Because I have a Boarzilla bought in 2008 never touched the bungs and get low to mid 40's depending on my right hand.
Mike

I have a buddy that's a racer and As soon as I pulled in his driveway he told me something was wrong. He also told me that he smelled fuel in the oil. So I posted what my problem was and Don Dorfman from Deweys told me that the bungs needed to be trimmed on the D&D's.
                  So Brian Nallin gave me his UPS code and told me to overnight him the pipe. So I sent the pipe to REVOLUTION PERFORMANCE and they welded some new bungs on free of charge and overnighted the pipe back to Cleveland. It cost Brian Nallin over $600 in shipping alone. When I first talked to Brian about my problem he told me that he stands behind his product and he will do whatever it takes to make my bike run rite, even if he has to fly a tech to Cleveland to do it.
                  In my book BRIAN NALLIN and revolution performance are class acts.

[Thumper Buttercup]

We had a problem with ours and Brian and Josh flew in Thursday and worked
and tested our bike all day, she is running much better now and running
very strong.  We offered to trailer to them but Brian would have nothing to
do with it and they came to us.  Top notch work, it looks like our throttle
adjustment was a probable cause to all our problems.

So they spent several hours riding and testing and tweaking our tune.

[gabbyduffy]

We had a problem with ours and Brian and Josh flew in Thursday and worked
and tested our bike all day, she is running much better now and running
very strong.  We offered to trailer to them but Brian would have nothing to
do with it and they came to us.  Top notch work, it looks like our throttle
adjustment was a probable cause to all our problems.

So they spent several hours riding and testing and tweaking our tune.

How does the throttle adjustment affect the tune?

[Thumper Buttercup]

If the Throttle cables are not properly adjusted then the butterfly will not
open all the way and the throttle position sensor will reports that the butterfly
is open but it is not and too much fuel is thrown in.

We adjusted ours after the fuel tank was installed and Josh did not like
our looseness, so I grabbed a couple wrenches and loosened the lock nuts
but I think I loosened it more that morning, Josh pulled the air filter and
the butterfly valve would only open about half the way which would have
created the bike running too rich.

Thursday is looking good for a run for us so we will report back.

[Steve Cole]

Adjusting the cables is an important thing but I must correct you on the other part.

The TPS will only report the Blade position, so if it will only open half way then that is all that get reported to the ECM. The TPS is attached to the throttle blade shaft NOT the cables.

[Thumper Buttercup]

Adjusting the cables is an important thing but I must correct you on the other part.

The TPS will only report the Blade position, so if it will only open half way then that is all that get reported to the ECM. The TPS is attached to the throttle blade shaft NOT the cables.

Thanks Steve,  I've been burned out the last few days and this has been still nagging
me and I could not put a finger on it.  Heck I just put a new throttle position sensor
when we did the rebuild but did not think twice about it the other day.

We'll finally get a ride on Thursday and see how she goes and see if the problems are
gone.  Thanks for pointing that out, I've been thinking on this and talking with the wife
saying something is not right but you put the finger on what has been bothering me.

[tracerbob]

Just installed a Rev Performance EMS on my 2010 Street Glide along with a Fuel Moto header, stage 1 A/C and Jackpot 4" muffs.  Installation was a snap and initial start up was uneventful.  I really like the crisper throttle response, smoother idle and less heat!  Too soon to tell about gas mileage.  Overall, I like it!

Why did I chose this over other systems like the TTS.  The major factors are the lack of a decent dyno tuner in my area and I would rather ride than fiddle around with a laptop.  The Rev Performance EMS is a true plug and play system. 

[Thumper Buttercup]

Good luck with it,

   I'm having to rebuild my top end due to it dumping fuel
into a fresh re-build and washing out the rings,  never worked right
for us.

[turboprop]

Good luck with it,

   I'm having to rebuild my top end due to it dumping fuel
into a fresh re-build and washing out the rings,  never worked right
for us.

After how they handled their nikasil cylinder/ring issue, am real interested to see how they handle this, if they step put o the plate like men, or if they pull their old 'it's not our fault' or 'you did something wrong', or maybe the 'someone else did something wrong' line. Please share. 

[Thumper Buttercup]

Andrew had the e-mail,

    Was told early this week of what we found in the engine and
the compression tests and leak-down.  Was told we are having
to rebuild.  Also asked about piston weights and if there will
be a problem with balance with the over sized pistons.  Got
a e-mail that he would check but nothing else since then.

[fatboi1959]

I am very happy with my RP EMS. May not be getting every last bit of power from my 120R but don't need to if i ride conservatively i'm getting around 40 MPG. Driveability is very good now after putting on some miles.

[gabbyduffy]

I am very happy with my RP EMS. May not be getting every last bit of power from my 120R but don't need to if i ride conservatively i'm getting around 40 MPG. Driveability is very good now after putting on some miles.

What kind of AFR readings are you getting with the EMS on the dyno? My drivability is great also, but when I run it on a dyno my AFR is all over the place.
                   I'm wondering if that is normal for this tuner?

[turboprop]

Andrew had the e-mail,

    Was told early this week of what we found in the engine and
the compression tests and leak-down.  Was told we are having
to rebuild.  Also asked about piston weights and if there will
be a problem with balance with the over sized pistons.  Got
a e-mail that he would check but nothing else since then.

Did RP offer any explanation as to why their device caused fuel to dump and in effect destroy the top end of your engine? Did they admit any fault, offer to offset the cost of the rebuild?

[fatboi1959]

Gabbyduffy i have never had it on the dyno.

[harpwrench]

gabbyduffy--Mine is really flat. I spent time riding it like you would if you were doing a TTS V-tune data run. Think about it. They flash your ECM with a canned map. RP's literature says the VE's are reprogrammed as you ride IIRC. If that's true, logic tells me you need to spend enough time in all the cells for the ECM to collect enough info to do that. If you just run it up through the gears and never spend 5-6 seconds in each cell, you're always running off the canned map with O2's chasing but never catching up, in the areas you don't normally spend time in. Does your bike run smoother than everywhere else, from 2500-3200 or so, where you spend the most time riding? I think it would be interesting to put your bike on a dyno and have the operator spend enough time in all the ranges/loads, and see what the sniffer says the system does with it. I think cycling the key switch also has something to do with the process. Anyway that's just my thinking on it, could be wrong!

[FLTRI]

...Think about it. They flash your ECM with a canned map...never spend 5-6 seconds in each cell, you're always running off the canned map with O2's chasing but never catching up...put your bike on a dyno and have the operator spend enough time in all the ranges/loads...

A very quick and efficient way to get the autotune happy which should make for a great running bike!
Bob

[Thumper Buttercup]

Andrew had the e-mail,

    Was told early this week of what we found in the engine and
the compression tests and leak-down.  Was told we are having
to rebuild.  Also asked about piston weights and if there will
be a problem with balance with the over sized pistons.  Got
a e-mail that he would check but nothing else since then.

Did RP offer any explanation as to why their device caused fuel to dump and in effect destroy the top end of your engine? Did they admit any fault, offer to offset the cost of the rebuild?

We had the unit on the bike for 2 months 1536.7 miles, bike was reprogrammed
4 times with one of them where they came here.  During this time we had to
do 5 oil changes due to fuel in the oil.  We gave up the beginning of August
and put in the TTS.  We did get our money back on the unit going through
Frank at Drago's where we bought it through.

If we babied the throttle and did nothing but very easy throttle work it seemed
fine, if we rode normal giving it some throttle or got on the interstate it sucked
gas 30 mpg avg and we could smell the fuel riding.  Plugs looked like we were
running coal each time we checked them, 4 sets of plugs changed during this time
also.

We never got anything in the way of a reply why the bike ran like this, if fact
the beginning of August we found some things that we thought were part
of the problem but those e-mails went unanswered also.

So we went to the TTS and finally got the bike running tune wise thanks to
all the help from Steve at TTS and Mayor.  But it was too late for the engine,
we finally got 2300 miles on a oil change but then noticed oil loss due to the
fuel washed rings.

Bike was test ridden in all speed conditions repeatitly but never came around
to run with good gas mileage.

[turboprop]

Did you say that RevPerf never answered your emails about this situation but they did send a techrep out to your location? Wow.

[Thumper Buttercup]

Did you say that RevPerf never answered your emails about this situation but they did send a techrep out to your location? Wow.

If the bike did not run right we would e-mail, they would e-mail a return
slip and we would ship the EMS back.

Brian (owner) and Joah (main programmer) came here in person after the first
two programs and the unit still did not perform.

Josh rode the bike and said it ran like a dog, worked on it for a few hours and
taking rides.  I rode it up the down the drag we were on, bike pulled good.
We got a test ride in 7 days later and problems still there and unit shipped
back again for changes.

We got tired of all the waiting for the ECM every-time it needed programming,
which was alot.

Bottom line is it did not work for our bike.  We were never told why.

[harpwrench]

I remember you saying that the ECM they supplied was faulty, wasn't it? That's a different issue than the EMS simply not working for your combination. Still a bad deal though.

[Thumper Buttercup]

I remember you saying that the ECM they supplied was faulty, wasn't it? That's a different issue than the EMS simply not working for your combination. Still a bad  deal though.

There are a bunch of issues that came up, but I cannot go into them, there was  some problems, they were brought to their attention but we never received any more reply's on those issues and they quit communicating with us.

That is when we made the decision to go to the TTS and more answers came up when we uploaded the TTS Calibration.  We had errors that showed up with their ECM but not with our old 04 ECM or with the new one with TTS Cal loaded.

We even took off every electrical connection on all engine sensors and did electrical checks to make sure there was no issue with the bike wiring.

At the end we sent 5 e-mails and some phone calls that were never replied to.  Even the one where we stated we give up and why.

[turboprop]

Hmmm, perhaps all is not hunky dory with RevPerf as some would like everyone to think. Seems odd that after going to meet with you and work on your bike, that they would essentially unplug you and call it quits on you. Knowing what I now know, had this happened to me RevPerf would be standing in a court room and probably end up with a judgement against them. Sorry for your troubles, seems like you have them worked out now. -Ed

[gabbyduffy]

gabbyduffy--Mine is really flat. I spent time riding it like you would if you were doing a TTS V-tune data run. Think about it. They flash your ECM with a canned map. RP's literature says the VE's are reprogrammed as you ride IIRC. If that's true, logic tells me you need to spend enough time in all the cells for the ECM to collect enough info to do that. If you just run it up through the gears and never spend 5-6 seconds in each cell, you're always running off the canned map with O2's chasing but never catching up, in the areas you don't normally spend time in. Does your bike run smoother than everywhere else, from 2500-3200 or so, where you spend the most time riding? I think it would be interesting to put your bike on a dyno and have the operator spend enough time in all the ranges/loads, and see what the sniffer says the system does with it. I think cycling the key switch also has something to do with the process. Anyway that's just my thinking on it, could be wrong!

How do I spend time in all the cells? Please explain.
                       What do you mean when saying spend 5 seconds in each cell?
                       Thanks for the advise, I'm willing to try anything to get my AFR's where they need to be. Before I put the bike on the Dyno I rode it for 500 miles to learn the map then I ran it on the Dyno and got the AFR reading that were all over the place.
                      I think what you are suggesting is,....... before I put it on the Dyno to run threw the whole RPM range in each gear. Run it wide open throttle a few times then put it on the dyno?

[dmrdn]

Hmmm, perhaps all is not hunky dory with RevPerf as some would like everyone to think. Seems odd that after going to meet with you and work on your bike, that they would essentially unplug you and call it quits on you. Knowing what I now know, had this happened to me RevPerf would be standing in a court room and probably end up with a judgement against them. Sorry for your troubles, seems like you have them worked out now. -Ed

Give me a break. 1 person has a problem and the product is a POS. My bike runs like gang busters with the EMS. I have 10k on it and not problem 1. Others have the same GREAT story to tell. I am one that if it were a problem you would be reading about it on all the forums.  It would be interesting to hear Rev Perfs side but they have too much class to stoop that low

[turboprop]

Please don't put words in my mouth. I never said it was a POS.

I think it is great that the RevPerf guys went to see the bike and tried to make it work. The fact that they couldn't make it work, the bike was not an extreme build, the top end was destroyed and in the end they refused to talk to the customer. 

It is what a company does when things don't go right that matters. In this case they failed. Their tuner thing might be the best thing in the world, but when it failed, the company cut and run. I am glad for you that yours is working and you are happy with it.

I stand by my statement.

[oldguy]

I've been watching this thread since the beginning, and have not wanted to get involved in slamming the ems, but I feel I should give my experience with it. I purchased the precision early in the spring and had high hopes that it would eliminate a long trip out to a tuner that is competent. First trial didn't work-after about 5 miles of riding, it fattened up the afr so much it was running only with extra throttle added. Went through approximately 6 or 7 times of sending the ecm back to revperf for modification and it still wouldn't work. Finally sold the unit , and it works fine for that person.
Having said all this, Brian and Josh tried their hardest to resolve the problem, but in the end it was both my fault, and also the type of exhaust/ cam combination I have that was the problem. First, I had an undetected exhaust leak on the rear cylinder- couldn't hear it even when plugging the pipe with a rag, finally discovered it by passing smoke over the exhaust manifold and could see the smoke get sucked in. Second, I think the pipes I use have an inherent reversion problem at idle.
The precision should work on 99% of the bikes out there if everything is sealed up tight the way it's supposed to be, the bikes it won't work on need special tuning ie, some open loop tuning in the low rpm/kpa cells.
Just my 2 cents, I hate to see someone or thing get a bad rap when it's usually a fault of something else!

[tracerbob]

All I can say is it works for me and I'm happy with it. 

[dmrdn]

I've been watching this thread since the beginning, and have not wanted to get involved in slamming the ems, but I feel I should give my experience with it. I purchased the precision early in the spring and had high hopes that it would eliminate a long trip out to a tuner that is competent. First trial didn't work-after about 5 miles of riding, it fattened up the afr so much it was running only with extra throttle added. Went through approximately 6 or 7 times of sending the ecm back to revperf for modification and it still wouldn't work. Finally sold the unit , and it works fine for that person.
Having said all this, Brian and Josh tried their hardest to resolve the problem, but in the end it was both my fault, and also the type of exhaust/ cam combination I have that was the problem. First, I had an undetected exhaust leak on the rear cylinder- couldn't hear it even when plugging the pipe with a rag, finally discovered it by passing smoke over the exhaust manifold and could see the smoke get sucked in. Second, I think the pipes I use have an inherent reversion problem at idle.
The precision should work on 99% of the bikes out there if everything is sealed up tight the way it's supposed to be, the bikes it won't work on need special tuning ie, some open loop tuning in the low rpm/kpa cells.
Just my 2 cents, I hate to see someone or thing get a bad rap when it's usually a fault of something else!

Glad you have a clear and understandng nature about your particular combination of pipes, cams, etc that could have caused the problem.  Thanks for the additional input.

[Thumper Buttercup]

Our pipes were sent to Rev-Perf to do the bungs, we pulled the pipes off
almost every ride, along with a oil change and spark plug change.  We
used Permatex gold to help seal the exhaust at the heads and the pipe
joints.

If you look at my old posts I have said nothing bad about Rev-Perf or
their attempts to help, during the two months we tried to get this system
to work.  Read our old posts.  I did my homework when we ordered this
unit, I know of all the guys running this with no problem, I really liked
the ideal of plug and play.

But when it came down to the end we were left to hang and they quit
responding to our communication attempts.

The 48N cams are not a radical cam and our build was a mild 95 build.

Josh knew something was wrong when they came here, Josh said this
bike ran like a dog.

We really wished this unit would have worked for us, but it did not and
we worked our butts off trying to get it to work.  Now we are having
to rebuild the top end our our bike because of the Rev-Perf EMS.

I wish the best to all running it but I will warn others that this unit does
not always work.  If you are running this unit I would have your AFR
checked to make sure you are ok.

This is the last I will post on these posts, but if there are new questions
about the Rev-Perf EMS I will post up a warning that you could have
issues like we did and that we are having to rebuild our bike on our own
because of it.

[mike 120]

Old guy, would you share the cam/pipe combo that might have been causing an issue?

[oldguy]

I'm using an s&s 640G, and was running two different sets of pipes, RB racing 2-1 with 2" head pipes, and Bassani RR B1's.
I used permatex to seal the headpipes with no results, ended up getting some Wurth exhaust sealing paste, which finally did the job. My bungs were perfect on both sets of pipes, there was no problem with the o2 sensors.
Nuff said.

[gabbyduffy]

Hmmm, perhaps all is not hunky dory with RevPerf as some would like everyone to think. Seems odd that after going to meet with you and work on your bike, that they would essentially unplug you and call it quits on you. Knowing what I now know, had this happened to me RevPerf would be standing in a court room and probably end up with a judgement against them. Sorry for your troubles, seems like you have them worked out now. -Ed

Give me a break. 1 person has a problem and the product is a POS. My bike runs like gang busters with the EMS. I have 10k on it and not problem 1. Others have the same GREAT story to tell. I am one that if it were a problem you would be reading about it on all the forums.  It would be interesting to hear Rev Perfs side but they have too much class to stoop that low

He's not the only guy that's having problems with the Revperf EMS.  Have you had your bike on the dyno yet? Let me know how your AFr readings look.

[gabbyduffy]

I've been watching this thread since the beginning, and have not wanted to get involved in slamming the ems, but I feel I should give my experience with it. I purchased the precision early in the spring and had high hopes that it would eliminate a long trip out to a tuner that is competent. First trial didn't work-after about 5 miles of riding, it fattened up the afr so much it was running only with extra throttle added. Went through approximately 6 or 7 times of sending the ecm back to revperf for modification and it still wouldn't work. Finally sold the unit , and it works fine for that person.
Having said all this, Brian and Josh tried their hardest to resolve the problem, but in the end it was both my fault, and also the type of exhaust/ cam combination I have that was the problem. First, I had an undetected exhaust leak on the rear cylinder- couldn't hear it even when plugging the pipe with a rag, finally discovered it by passing smoke over the exhaust manifold and could see the smoke get sucked in. Second, I think the pipes I use have an inherent reversion problem at idle.
The precision should work on 99% of the bikes out there if everything is sealed up tight the way it's supposed to be, the bikes it won't work on need special tuning ie, some open loop tuning in the low rpm/kpa cells.
Just my 2 cents, I hate to see someone or thing get a bad rap when it's usually a fault of something else!
[/quote

                        Old Guy, Im glad you spoke up. I'm going to have to check my intake seal and make sure its got a good seal. When I ran the ems with my D&D pipes the afr was perfect, Then I had some motor work done (Throttle body off) and I could not get a good afr reading after that. It never accured to me that the intake seal could be bad.
                        I'm going to replace the seals and run it on the dyno again to see where I'm at.  Thanks for the info, Old Guy. I'll keep you posted. Thanks, Duff.   

[dmrdn]

Hmmm, perhaps all is not hunky dory with RevPerf as some would like eveTyryone to think. Seems odd that after going to meet with you and work on your bike, that they would essentially unplug you and call it quits on you. Knowing what I now know, had this happened to me RevPerf would be standing in a court room and probably end up with a judgement against them. Sorry for your troubles, seems like you have them worked out now. -Ed

Give me a break. 1 person has a problem and the product is a POS. My bike runs like gang busters with the EMS. I have 10k on it and not problem 1. Others have the same GREAT story to tell. I am one that if it were a problem you would be reading about it on all the forums.  It would be interesting to hear Rev Perfs side but they have too much class to stoop that low

He's not the only guy that's having problems with the Revperf EMS.  Have you had your bike on the dyno yet? Let me know how your AFr readings look.

Yep. Had it on after about 5000 miles on the EMS just for S&G's. 13.2-13.4 across the board

[lonewolf]

  Yep. Had it on after about 5000 miles on the EMS just for S&G's. 13.2-13.4 across the board

And that's good?

[harpwrench]

Mine was 13.5 cruise and 12.0 very flat at WOT. Too rich IMO.

[oldguy]

Gabbyduffy- I had an exhaust leak, not an intake leak. However, an intake leak will also cause problems with the tuner as well. Start the bike, warm it up, and spray some carb cleaner around the intake manifold, being careful to not let any suck into the air filter (and be careful about breathing vapors). I f the engine speed changes, you've got a leak.
HTH

[gabbyduffy]

Gabbyduffy- I had an exhaust leak, not an intake leak. However, an intake leak will also cause problems with the tuner as well. Start the bike, warm it up, and spray some carb cleaner around the intake manifold, being careful to not let any suck into the air filter (and be careful about breathing vapors). I f the engine speed changes, you've got a leak.
HTH

Thank you for the advice, and how did you check for the exhaust leak? Did you use a cigarette for the smoke, and see if it got sucked in near the exhaust gasket?......

[oldguy]

Actually, I used some dried sweetgrass, a herb used by the aboriginals around here. You need something that will make enough smoke that you can actually watch where it goes without dispersing too quickly. I suppose a smoldering popsicle stick or tongue depressor could work too.

[gabbyduffy]

                   Just completed replacing the throttle body intake seals,..... the bike runs and sounds allot better, even idles better. its hard to tell without putting the bike on a dyno,..... throttle response is night and day.  ... I did not check for a intake seal leak I just went ahead and replaced the seals.... I think it did the trick, but only time will tell... Duff.