Popping Exhaust Question
Road Captain
Joined: Mar 2008
Posts: 517
Likes: 0
Let me clarify, He said "a tune it would be 4-5 hours of labor at $125 an hour" That's alot more than a PCV and if you change anything in the future it means another tune at the dealer meaning; more $$$. I highly recommend Fuel Moto, They've done all the research and have manufactured they're own quality stuff so yes I'll get, give and send them business every chance I get.
Novice
Joined: Jun 2010
Posts: 19
Likes: 0
From: new york
if you have a fairly open exhaust with not much back pressure you are going to spend hundreds of dollars trying to get rid of the popping with no cure. Popping could happen when the engine is running very lean when the throttle is suddenly closed, however it is a normal condition on high flow pipes. you can buy a fuelpak, SERT, PC-V and even put on the auto tune and you will still have the popping. my glide was dyno-tuned with a power commander 111- perfect air fuel ratio of 13.6 from idle thru 6000 rpm and it still popped due to the characteristics of the exhaust design. if you want to get rid of the popping install an exhaust with some good back pressure design.
Thread Starter
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Tourer
Joined: Jun 2010
Posts: 404
Likes: 3
From: St Louis, MO
if you have a fairly open exhaust with not much back pressure you are going to spend hundreds of dollars trying to get rid of the popping with no cure. Popping could happen when the engine is running very lean when the throttle is suddenly closed, however it is a normal condition on high flow pipes. you can buy a fuelpak, SERT, PC-V and even put on the auto tune and you will still have the popping. my glide was dyno-tuned with a power commander 111- perfect air fuel ratio of 13.6 from idle thru 6000 rpm and it still popped due to the characteristics of the exhaust design. if you want to get rid of the popping install an exhaust with some good back pressure design.
One hangup I would have with dumping the SERT and going with a PCV and map from Fuel Moto, is that all my knowledge of what was done to the bike is second hand info. I am not the one who did any of the mods, so I really do not know for sure everything that has been done.
Thanks again everyone for the help.
Phil
Road Master
Joined: Nov 2009
Posts: 760
Likes: 6
From: Central Wisconsin
Let me clarify, He said "a tune it would be 4-5 hours of labor at $125 an hour" That's alot more than a PCV and if you change anything in the future it means another tune at the dealer meaning; more $$$. I highly recommend Fuel Moto, They've done all the research and have manufactured they're own quality stuff so yes I'll get, give and send them business every chance I get.
Stellar HDF Member
Joined: Sep 2007
Posts: 2,458
Likes: 671
From: Vancouver Island B.C.
13.6 everyware is far from perfect. You can be as lean as 14.5 in cruise areas and should be 13-13.2 at wot. Adding fuel in 20% Map column on the afr table is one way of eliminating decel pop. Sometimes you may have to go as rich as 12.2 to eliminate the pop. As a rule of thumb it will not affect fuel mileage as you are only in this area of the map while deacellerating. On rare occasions the odd build will cruise at this low of a map value in the lower rpms, but that is easily determined by doing a data log.
Last edited by Lonewolf176; Jul 18, 2010 at 12:11 PM.
Road Master
Joined: Oct 2007
Posts: 808
Likes: 1
From: so.jersey
+1 on this i had to do this on my last bike and it worked wonders.remove your slip-ons and put a good amt .of the copper sealant around the surface where your pipes connect let cure for 24 hrs. should do the trick .at least this way you will know if it's a leak .before you spend money for a tune.
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Supporter
Joined: Aug 2008
Posts: 1,272
Likes: 1
From: North East Ohio
Mine was popping after my last long trip. Mufflers were both leaking @ Tailpipes. Ultra Copper sealant fixed that. Both header pipes needed re-tightened at engine. All 4 manifold bolts were loose.