Author Topic: Stock Exhaust on a Mild Build?  (Read 987 times)

0 Members and 1 Guest are viewing this topic.

Offline WhipLash96

  • Full Member
  • Posts: 1687
  • Country: us
  • No Mobiling Like HarleyMobiling
Re: Stock Exhaust on a Mild Build?
« Reply #25 on: December 11, 2017, 04:07:02 PM »
Slip ons are the way to go, the cross over will allow more performance through the same size muffler compared to the VH head pipes.
The best set-up I have seen is the Stock Twin cam Dyna head pipes with the cross tube down by the muffler. They bolt right on an Evo and clean up the veiw of the engine. It also makes jetting a lot easier.

This is exactly where he has his crossover, right by the mufflers just behind the tranny cover. :smiled:
Thanks,
Whip

Offline 94wideglide

  • Member
  • Posts: 6
  • Country: us
Re: Stock Exhaust on a Mild Build?
« Reply #26 on: December 14, 2017, 09:41:32 AM »
I run this exact exhaust on my 94 FXDWG with a EV27 and SE II slip-ons and it made 94hp and 100tq. Nothing wrong with this combonation that I have found.

Offline tmwmoose

  • Site Supporter
  • Full Member
  • *****
  • Posts: 2732
  • Country: 00
Re: Stock Exhaust on a Mild Build?
« Reply #27 on: December 14, 2017, 02:11:49 PM »
I run this exact exhaust on my 94 FXDWG with a EV27 and SE II slip-ons and it made 94hp and 100tq. Nothing wrong with this combonation that I have found.

Is there anything else done to this motor at these numbers? :soda:

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #28 on: December 14, 2017, 02:21:30 PM »
I run this exact exhaust on my 94 FXDWG with a EV27 and SE II slip-ons and it made 94hp and 100tq. Nothing wrong with this combonation that I have found.

Is there anything else done to this motor at these numbers? :soda:

Me curious Tooo!    :fish:
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Hossamania

  • Road Glide Lover
  • Site Supporter
  • Full Member
  • *****
  • Posts: 14972
  • Country: us
  • No. No RoadGlides
Re: Stock Exhaust on a Mild Build?
« Reply #29 on: December 14, 2017, 02:28:23 PM »
That would be a gain of about 30 horsepower with just a cam change. Very impressive, but I had to do heads, a 2 into 1 pipe, and a bigger carb to achieve that type of gain.
I don't doubt that it runs very nicely. I saw your graph in the dyno section. It just seems optimistic.
Life, Liberty, and the Pursuit of Happiness.

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #30 on: December 14, 2017, 02:32:44 PM »
I am not going to start poowing, I just am doubtful.
I have done WAY more than that and would guess a 100 Hp as will pass  a F6B  like it is up on the stand.
I just dont see a cam and exhaust netting that kind of power .
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline 1FSTRK

  • Full Member
  • Posts: 7762
  • Country: 00
Re: Stock Exhaust on a Mild Build?
« Reply #31 on: December 14, 2017, 02:45:25 PM »
Looks like he listed the rest in the dyno section. It is only his 5th post here.

http://harleytechtalk.com/index.php?topic=101846.msg1198255#msg1198255

"Never hang on to a mistake just because you spent time or money making it."

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #32 on: December 14, 2017, 02:50:42 PM »
sORRY
.O40 AND SQUAT.

I do mean this most CORDIALLY.
Sincerely, I doubt it .
'That means my DM cam
port job, Aztell piston and cylinders, 10.5 to 1 , Double plug
TwinnTech and so much more.... was all a waste of time...............
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Hossamania

  • Road Glide Lover
  • Site Supporter
  • Full Member
  • *****
  • Posts: 14972
  • Country: us
  • No. No RoadGlides
Re: Stock Exhaust on a Mild Build?
« Reply #33 on: December 14, 2017, 03:03:09 PM »
That would be a gain of about 30 horsepower with just a cam change. Very impressive, but I had to do heads, a 2 into 1 pipe, and a bigger carb to achieve that type of gain.
I don't doubt that it runs very nicely. I saw your graph in the dyno section. It just seems optimistic.

I forgot, I also did a big bore kit with the cams, heads, pipe, and carb to gain 33 horsepower on a Twin Cam.
Stock Evos usually make about 60 horsepower at best. A gain of 34 horsepower on .040 bore and a cam, especially just a 27, is just hard to swallow.
Again, I'm sure it runs well, just thinking it was a happy dyno.
This is a tough crowd sometimes on this site when it comes to power claims. Don't take it personally, everyone here gets slayed.
Life, Liberty, and the Pursuit of Happiness.

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #34 on: December 14, 2017, 03:17:26 PM »
I thought we were being rather polite.....
i think it is purrfectly OK to disagree.
i have a friend out on the west coast that does Porsche cars on the dyno.
He says he can make a dyno say anything he wants,  .... if he wanted to be dishonest......
SOOO
that thought just turned on a light...
If i owned a shop and did dubious work but could amp sales with dyno charts...
AHEM
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #35 on: December 14, 2017, 03:30:11 PM »
http://www.nightrider.com/biketech/hdbuildstage3_95.htm

Its not posable to get a 100 HP rise without either Bumping the CR or going forced induction.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Deye76

  • Full Member
  • Posts: 7952
  • Country: 00
Re: Stock Exhaust on a Mild Build?
« Reply #36 on: December 14, 2017, 04:38:58 PM »
I had a 80" with STD heads, J&E pistons, 10.3 cr, DM.580 cam, S&S E, Supertrapp 2X1, 86hp/ 93tq. I spent way too much money it seems.  :wink:

In the Heads on a Evo thread he did indicate he had head work. I'd be interested in who ported them.
East Tenn.
2014 CVO RK, 2015 RGS, 1992 FXRP

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #37 on: December 14, 2017, 05:07:06 PM »
I guess I read it too wrong or too fast..even so
The CR would have to come up a couple of points.

It's all good.
I needed something to rant about tonight.
I need to dyno mine -
By this sited example, I must have about a 150HP...................
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline Hossamania

  • Road Glide Lover
  • Site Supporter
  • Full Member
  • *****
  • Posts: 14972
  • Country: us
  • No. No RoadGlides
Re: Stock Exhaust on a Mild Build?
« Reply #38 on: December 14, 2017, 07:06:14 PM »
I did not see that the heads were flowed either, along with an E carb. That would definitely help get the horsepower up.
Life, Liberty, and the Pursuit of Happiness.

Offline 1FSTRK

  • Full Member
  • Posts: 7762
  • Country: 00
Re: Stock Exhaust on a Mild Build?
« Reply #39 on: December 14, 2017, 07:17:49 PM »
Two things that stand out to me.
 At .040 over a 80" is now 83.57 ci so that comes out to 1.13 hp/ci which good but not at all unbelievable.
 The name of the dyno shop, if he did the work and tune I would say it's his mild build.
"Never hang on to a mistake just because you spent time or money making it."

Offline pwmorris

  • Full Member
  • Posts: 1953
  • Country: us
Re: Stock Exhaust on a Mild Build?
« Reply #40 on: December 15, 2017, 06:13:25 PM »
I run this exact exhaust on my 94 FXDWG with a EV27 and SE II slip-ons and it made 94hp and 100tq. Nothing wrong with this combonation that I have found.
Incredible......
Take a stock, crate from the MOCO, 8.5 CR 80" EVO, Add a flowing exhaust, and a "magical" cam, and pick up 30 plus HP and 25 plus TQ over stock! Wow!
Post the sheet as I am a big time fan!!!

Offline Hossamania

  • Road Glide Lover
  • Site Supporter
  • Full Member
  • *****
  • Posts: 14972
  • Country: us
  • No. No RoadGlides
Re: Stock Exhaust on a Mild Build?
« Reply #41 on: December 15, 2017, 06:32:01 PM »
He did post it in the dyno section. I can't link it from my phone.
It had flowed heads and an "E" carb as well.
Life, Liberty, and the Pursuit of Happiness.

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #42 on: December 15, 2017, 06:36:34 PM »
Yes, it was posted..But I don't believe it.
Here is one reason.

http://www.nightrider.com/biketech/hdeds3h1010.htm

it takes some serious work to broach a 100 HP from a little EVO
Yes it is done nowadays all the time, but a cam, exhaust, and ported heads will not do it.
Like said - the CR has to be bumped.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.

Offline pwmorris

  • Full Member
  • Posts: 1953
  • Country: us
Re: Stock Exhaust on a Mild Build?
« Reply #43 on: December 15, 2017, 06:59:06 PM »
Lol..
Damn I love the BS from these fantasy sheets....an EVO - crate - ( which come from the real world, not the "fantasy world"), the Stock 80" in the 1990's, is still at 8.5-1 compression, so........your engine is around 9.0-1 with a compression building cam like a EV13 or EV27 to get maybe 170 CR-

100 HP lol! Nitrous maybe???
Done this build many times.....
As said, better bump the comp with piston, big time heads etc....
Reality check- so now we are at a full rebuild, heads, compression pipe, etc...

LMAO....cam and pipe, my ass...

No Free Lunch-

Offline pwmorris

  • Full Member
  • Posts: 1953
  • Country: us
Re: Stock Exhaust on a Mild Build?
« Reply #44 on: December 15, 2017, 07:03:03 PM »
He did post it in the dyno section. I can't link it from my phone.
It had flowed heads and an "E" carb as well.
Bullshit-
Just a cam and pipe he said...now YOU say add worked heads, what else? You sure there is NO comp bump and Pistons?
This is getting ridiculous...

Offline Hossamania

  • Road Glide Lover
  • Site Supporter
  • Full Member
  • *****
  • Posts: 14972
  • Country: us
  • No. No RoadGlides
Re: Stock Exhaust on a Mild Build?
« Reply #45 on: December 15, 2017, 09:24:43 PM »
He did post it in the dyno section. I can't link it from my phone.
It had flowed heads and an "E" carb as well.

Bullshit-
Just a cam and pipe he said...now YOU say add worked heads, what else? You sure there is NO comp bump and Pistons?
This is getting ridiculous...


Those extra specs were listed in the title of his dyno sheet. 40 over bore, which means pistons (high comp?), flowed heads (shaved?), plus the rest.
 But not mentioned in this thread. Here he just said a cam and slip on mufflers.
So yes, it is getting ridiculous. Cams and mufflers did not yield 94 horsepower.

http://harleytechtalk.com/index.php?topic=101846.0
Life, Liberty, and the Pursuit of Happiness.

Offline JW113

  • Full Member
  • Posts: 1347
  • Country: 00
  • San Jose, California
Re: Stock Exhaust on a Mild Build?
« Reply #46 on: December 16, 2017, 11:25:58 AM »
Am I the only one that read the last post on that link?

 :scratch:

Ported heads, 10.5:1 pistons...

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Offline Deye76

  • Full Member
  • Posts: 7952
  • Country: 00
Re: Stock Exhaust on a Mild Build?
« Reply #47 on: December 16, 2017, 11:38:12 AM »
IIRC Andrews says 9.5:1 maximum compression for the EV27. If at 10.5, have to wonder how easily it will ping.
East Tenn.
2014 CVO RK, 2015 RGS, 1992 FXRP

Offline Hossamania

  • Road Glide Lover
  • Site Supporter
  • Full Member
  • *****
  • Posts: 14972
  • Country: us
  • No. No RoadGlides
Re: Stock Exhaust on a Mild Build?
« Reply #48 on: December 16, 2017, 06:21:42 PM »
Am I the only one that read the last post on that link?

 :scratch:

Ported heads, 10.5:1 pistons...

-JW

I think that got posted after my response. Seems a proper build.
Life, Liberty, and the Pursuit of Happiness.

Offline thumper 823

  • Full Member
  • Posts: 558
  • Country: us
  • If they say cant , it just means someone else will
Re: Stock Exhaust on a Mild Build?
« Reply #49 on: December 16, 2017, 07:20:14 PM »
IIRC Andrews says 9.5:1 maximum compression for the EV27. If at 10.5, have to wonder how easily it will ping.

I have double plug 10.5:1  Cr and a DM 530 Cam.
No problem.
D Troop 3/5, - C/16 ,162AHC, Mekong delta.
Amateur engineering with bad math.