High Performance Questions 96 Sportster

[mayor]

Yeah, I know.... I have been looking at pipes all over the place and I just haven't been able to find anything that I LOVE other than what it is that I have on. So I went to a custom pipe builder and had a long conversation. I think that I may have found the answer...

if they are going to build you a set of pipes for show.....save your money.....ask them about how they handle reversion and if they believe in pulse wave tuning, if they give you a good answer....you might be ok. 

[WhipLash96]

Yeah, I know.... I have been looking at pipes all over the place and I just haven't been able to find anything that I LOVE other than what it is that I have on. So I went to a custom pipe builder and had a long conversation. I think that I may have found the answer...

if they are going to build you a set of pipes for show.....save your money.....ask them about how they handle reversion and if they believe in pulse wave tuning, if they give you a good answer....you might be ok.

I think that i found a way around all issues that i am faced with. i would explain here but it would take a lot of time.. lets just say that I found a way to keep the look that i have now, but have also found a way to add performance added by a better system...

[mayor]

ok, but keep in mind there are no magic beans.  If you are keeping the look that you have now.....you won't find a giant beanstock at the end. 

[WhipLash96]

ok, but keep in mind there are no magic beans.  If you are keeping the look that you have now.....you won't find a giant beanstock at the end.

With a custom pipe you can do what ever it is that you want.. Not sure that I understand your magic bean analogy though???

So are you a pro wrench??

[mayor]

With a custom pipe you can do what ever it is that you want..  

that's my point....doing what ever you want may be the same or worse than you have now.  There's more to tuning exhaust than shear flow.  There's pulse waves, tune the pulse waves and you will end up with better results.   

So are you a pro wrench??

no, just a fictional internet politician.   

[WhipLash96]

that's my point....doing what ever you want may be the same or worse than you have now.  There's more to tuning exhaust than shear flow.  There's pulse waves, tune the pulse waves and you will end up with better results.
[/quote]

I will be talking to my Indy today and getting some better idea's on what it is that I can or cannot do with this exhaust. This isn't set in stone but it is an avenue that I want to explore a lot more. A lot of this is going to come down to money. Is this going to cost me more than what a set of catalog pipes will? I guess I find out...

[hotroadking]

Custom made pipes for the bike are
not going to be inexpensive, it takes
time testing and extensive knowledge
of how a pipe flows. 

Couple of guys here have home built pipes.

[WhipLash96]

Custom made pipes for the bike are
not going to be inexpensive, it takes
time testing and extensive knowledge
of how a pipe flows. 

Couple of guys here have home built pipes.

Really?? Home built pipes is pretty much what I have now. Doesn't look like there was much science involved in those. To a point, I think you are making this sound way more complicated that it needs to be or than what it really is. My bike isn't a drag bike in any way shape or form, I don't need to have the best of the best like some people we know...

[WhipLash96]

I got my carb parts in today.  It is time to get this beast running well.....

[hotroadking]

I don't need to have the best of the best like some people we know...

All the more reason to get it right the first time, cost's less LOL

[WhipLash96]

I will be taking the carb apart to replace the needle with a N65C. I am anxious to see what it does.

HRK, Have a Great Time at Biketoberfest!!!

[hotroadking]

Found some pipes for you there




Sent from my iPhone using Tapatalk

[WhipLash96]

Hey there HRK. Listen, I owe you an apology. I now understand why you and Major are saying that I am to heavy on the pilot. I did a little research and I found that I am on my pilot until 1/4 throttle. I have heard this before, but for some reason, and I have no idea why, but I was thinking that I am off the pilot until just after off idle. I found that it can last up until about 2400 rpm. It makes sense to me now and I will change that pilot jet down.

Thank You HRK and Major for the information that you have given. I am a rookie at this stuff in this much detail. I only want to learn, not to offend anyone. I ask a lot of questions but not always the right ones. Aging, thanks and I will keep you posted..

[hotroadking]

Well we coulda explained that a little better,
got used to just offering a solution (possible)
than going into the details.

Its a great learning curve, and didn't you tear that
carb down and find some more information you should post here?

[mayor]

I did a little research and I found that I am on my pilot until 1/4 throttle. I have heard this before, but for some reason, and I have no idea why, but I was thinking that I am off the pilot until just after off idle. I found that it can last up until about 2400 rpm. It makes sense to me now and I will change that pilot jet down.

Based on the AFR meter testing I've done, the pilot jet affects a wider range than just the first 1/4 throttle and the needle comes into play aooner than at 1/4 throttle. There's actually an overlap where the needle and pilot are both factoring in on what the afr will be.  The n65c needle was designed in 1988 for a cv carb that didn't have a accelerator pump/nozzle.  That needle makes the transition from the pilot to the needle area richer, so that's why you will likley need a smaller pilot than the 46 you are running now.

here's a good read that discusses the real life affects of the various circuits on a CV carb (it's of a cv44, but the transitions are the same):
http://harleytechtalk.com/htt/index.php/topic,26210.msg267218.html#msg267218

[hotroadking]

Mayor he found an unshimed N65, vs the shimmed needle that he thought he had
and I think he said it had a modified accel pump but ICRS so Whipster will have to chime in and give us details,  Remember him saying the hole fit a 3/32 bit, which converted is 6/64 if my basic poor math skills are correct so the hole is fine (supposed to be 7/64)

Yep with the rich needle he needs a smaller pilot and to adjust the screw to
get the air mix right, then work on the main.

I wonder what Needle jet tube is in this bike as well as what spring is
on the slide. 

Makes tuning fun when ya have no idea whats in the darn thing to begin with LOL

[WhipLash96]

Mayor he found an unshimed N65, vs the shimmed needle that he thought he had
and I think he said it had a modified accel pump but ICRS so Whipster will have to chime in and give us details,  Remember him saying the hole fit a 3/32 bit, which converted is 6/64 if my basic poor math skills are correct so the hole is fine (supposed to be 7/64)

Yep with the rich needle he needs a smaller pilot and to adjust the screw to
get the air mix right, then work on the main.

I wonder what Needle jet tube is in this bike as well as what spring is
on the slide. 

You are right, I did find an N65c needle with no shim. Not sure where you got that I had a modified accel pump though? As far as I know there has been no other modifications to the carb. I bought a new slide spring, a 45 pilot, an N65 needle thinking that I needed one, and I bought main jets, sizes 190-200. I am set to go. I just got the carb cleaned up tonight along with my garage.  The carb was especially dirty.

Makes tuning fun when ya have no idea whats in the darn thing to begin with LOL

[hotroadking]

and expensive when you buy stuff twice

[WhipLash96]

and expensive when you buy stuff twice

You know what, I did have a rebuild kit put put in the carb right away because the first indy I took the bike to put one in. I have no idea what it is that he put in it though. The reason why I had it in is because I was getting a real dead spot when I would roll on the throttle. After the kit went in, the dead spot went away..

[WhipLash96]

Today I should be able to get you guys an update on how my scoot runs.. Haven't been feeking well lately. talk at you all later..

[WhipLash96]

I have a dyno appointment scheduled in two weeks. I put the new main jet in and I think that I am really close to what it is that I need. My bike feels so much better than what it did. I am looking forward to what the dyno has to say..

[Caper]

I have a dyno appointment scheduled in two weeks. I put the new main jet in and I think that I am really close to what it is that I need. My bike feels so much better than what it did. I am looking forward to what the dyno has to say..

Be interesting to see what the AFR charts say too!!

[14Frisco]

I have a dyno appointment scheduled in two weeks.

Assuming you are putting it on a Dynojet dyno, bring a USB memory stick with you and ask for the run files when you are done.
Then go to http://www.dynojet.com/downloads/software.aspx and download and install WinPEP that allows you to view and manipulate those run files.

[WhipLash96]

I have a dyno appointment scheduled in two weeks. I put the new main jet in and I think that I am really close to what it is that I need. My bike feels so much better than what it did. I am looking forward to what the dyno has to say..

Be interesting to see what the AFR charts say too!!

You know that I will post them too!! How have you been my friend? Actually I think that I have some small issues to work in the mean time. I am going to be taking out that 195 and [utting in the 190 and resetting the idle mix. I am going to leave the 46 pilot in and go from there.

[WhipLash96]

Well, I got new pipes in here this week and they are basically installed. I changed the main jet down from a 195 down to a 190 and I am going to run it there for a little bit to see how WhipLash responds to that. I asked my indy if I should change my pilot right away as well and he just does not want that pilot touched. So I left it..