Fuel Moto's Pwr Pkg. & Decel Popping/Backfire
#11
08-18-2010 | 02:01 PM
I appreciate all of the responses and iclick is right in that I have not altered my idle settings. As I said in my original post, my current map setting of 15 from 1500-5250 RPM has pretty much resolved the decel popping. I was trying to resolve the backfire occurrence when shifting. I found it interesting that a map setting of -10 resolved the backfire but brought back the decel popping and a positive map setting of 15 eliminates the decel popping but brings back the backfire when shifting. Interesting phenomenon.
I think I will try Jamie's suggestion and go to a positive 20 and see what happens. If I get enough ambition, I may take the whole exhaust system apart again and replace all of the gaskets. I had originally just replaced the crossover gasket and left the head pipe gaskets as original because they looked ok.
But I would rather just be riding.
I think I will try Jamie's suggestion and go to a positive 20 and see what happens. If I get enough ambition, I may take the whole exhaust system apart again and replace all of the gaskets. I had originally just replaced the crossover gasket and left the head pipe gaskets as original because they looked ok.
But I would rather just be riding.
__________________
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
#12
08-19-2010 | 11:52 AM
Tourer
Joined: Jun 2010
Posts: 391
Likes: 0
You can probably bribe your local smoker with a pack of his/her choice (or just this once ........ light up yourself) and use a cigarette to gently blow/let the smoke drift around the exhaust joints with the engine running to see if there is any leaks.
If you do find some, and/or just decide to go ahead redo the exhaust connections, get a ~10" piece of 1.75" O.D., and minimum 1/16" wall thickness, steel tubing.
Use a table sander, file, or grinder to bevel one edge at about 45º angle, to make up a mandrel, and then pound it into the 'large' exhaust slip fit (where the torca clamps secure it) and use a ball peen hammer to to take out any dents the torca clamps may have made in the exhaust pipe, and to ensure the flanged areas of the joints (not the header flange) are round again.
If you know somebody that has a set of FullSac TD's see if they might let you borrow the one that comes in that kit.
It's drawback is that it's only 4 inches long and as such .... can be a bit of a hassle to remove once it's in there (hence the recommendation to make up one about 10" long).
It's advised to use new torca clamps any time they are removed, but I have gotten away with using the same ones again ....... YMMV.
If you do find some, and/or just decide to go ahead redo the exhaust connections, get a ~10" piece of 1.75" O.D., and minimum 1/16" wall thickness, steel tubing.
Use a table sander, file, or grinder to bevel one edge at about 45º angle, to make up a mandrel, and then pound it into the 'large' exhaust slip fit (where the torca clamps secure it) and use a ball peen hammer to to take out any dents the torca clamps may have made in the exhaust pipe, and to ensure the flanged areas of the joints (not the header flange) are round again.
If you know somebody that has a set of FullSac TD's see if they might let you borrow the one that comes in that kit.
It's drawback is that it's only 4 inches long and as such .... can be a bit of a hassle to remove once it's in there (hence the recommendation to make up one about 10" long).
It's advised to use new torca clamps any time they are removed, but I have gotten away with using the same ones again ....... YMMV.
Last edited by flyer91; 08-19-2010 at 11:54 AM.
#16
08-19-2010 | 10:26 PM
Cruiser
Joined: Feb 2010
Posts: 119
Likes: 0
From: Oregon
Thanks for the info in this thread. I have been chasing decel popping ever since I bought this bike. In other posts I was trying to really find out why it happens and never received any satisfactory replies. I took my whole exhaust off today, replaced the gaskets, put on new clamps and put the the seal on the muffler joint. I will try it out tomorrow, though because of past experiences I am skeptical about a fix.
#17
08-19-2010 | 11:15 PM
Road Captain
Joined: Aug 2009
Posts: 505
Likes: 0
From: Utah
Not to hijack the thread but has anyone seen damage from installing pipes without fuel management i/e running lean? These bikes have oxygen sensors and can make adjustments while in closed loop. I know they are in open loop at WOT but seriously I haven't read any posts about engine damage from adding pipes/a/c without after market fuel management.
#18
05-12-2013 | 11:45 AM
Tourer
Joined: Jun 2005
Posts: 463
Likes: 0
From: Des Moines, IA
Bumping from waayyyyy back...
This is an old thread but it still applies to me and hoping that since this topics birth others have had the same issue and/or a fix.
Since this thread I have tried several maps and had two dynos done. The best so far is the one I had completed in Sturgis last fall by Speeds.
Bike runs well but yet I still have the popping during up shifts no, absolutely no popping during decel in gear clutch out. When in neutral and rev'ing there is almost no popping there either. Also yes the gaskets were all replaced as well as the clamps.
I tried the smoke from an incense stick to check for leaks and nothing.
Someone chime in here and help out. Thanks!
Since this thread I have tried several maps and had two dynos done. The best so far is the one I had completed in Sturgis last fall by Speeds.
Bike runs well but yet I still have the popping during up shifts no, absolutely no popping during decel in gear clutch out. When in neutral and rev'ing there is almost no popping there either. Also yes the gaskets were all replaced as well as the clamps.
I tried the smoke from an incense stick to check for leaks and nothing.
Someone chime in here and help out. Thanks!
#19
01-24-2015 | 11:33 PM
Road Master
Joined: Apr 2014
Posts: 895
Likes: 95
From: Post Falls,Idaho
decel popping
This thread is handy.I have enjoyed reading it.I just put on Full Boar slip ons on my bike and get decel popping just as the throttle is almost closed.Once its closed it stops.I went from screaming eagle street thunders to 2" open baffles.The throttle response and power are noticeable but would like to get rid of popping.Bike already has a 49 state stage one download.Screaming eagle ac.
#20
01-26-2015 | 06:39 AM
Tourer
Joined: Nov 2008
Posts: 480
Likes: 0
From: Conover, NC
I had this problem and tried a couple of new maps Jamie sent me. They helped but didn't completely solve the problem. I decided to check all exhaust gaskets and found a new crossover gasket was leaking causing the problem.... not visually evident. I took the crossover apart and re-tightened and problem gone. 