07 flhtp electra glide, 103 ci
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Intermediate
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07 flhtp electra glide, 103 ci
Can someone educate me as to why hd designed the exhaust system on this bike so that most of the exhaust flow goes out the right side. I see there is a "y" on the rear cylinder to supposedly direct some exhaust to the left side but from what i can tell about 75% of the exhaust and heat is directed out the right side. I just put on new chrome vance and hines twin slash round mufflers because the original right side stock muffler had a lot of heat discoloration. It appears to me that the rear cylinder pipe "y" is a waste unless there was supposed to be something installed that restricts some of the rear cyl exhaust from flowing to the right side. Is there simple solution to solve this problem? Thanks
Ultimate HDF Member
Joined: Jan 2009
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From: East Tn Foot of The Dragon
True dual head pipe with matched slipons will solve it, A 2 into 1 system will solve it and improve performance. There is a company that used to sell a non Y pipe for the rear cylinder that directs only to the left muffler, it is not a matched head pipe, but does split the output volume of the exhaust. Harley also designs the stock mufflers to be different in design to counter act the imbalance.
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Whiteoaks
Thanks to both of you for your comments. Checked out the FullSac pipe conversion and looks like that would do the trick. Not really into the 2 to 1 for this bike. Does anyone else make a kit similar to the FullSac system?
B&E Performance that makes Super Flow mufflers has their version of the kit which is virtually identical. Website shows it's $139 for 95-06 & $169 for 07-08. I'll be getting the same kit when I can save some $$$ for it. And NO I don't work for them.
http://www.superflowmufflers.com/products.htm
http://www.superflowmufflers.com/products.htm
Extreme HDF Member
Joined: Sep 2005
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From: Baton Rouge, LA
Can someone educate me as to why hd designed the exhaust system on this bike so that most of the exhaust flow goes out the right side. I see there is a "y" on the rear cylinder to supposedly direct some exhaust to the left side but from what i can tell about 75% of the exhaust and heat is directed out the right side. I just put on new chrome vance and hines twin slash round mufflers because the original right side stock muffler had a lot of heat discoloration. It appears to me that the rear cylinder pipe "y" is a waste unless there was supposed to be something installed that restricts some of the rear cyl exhaust from flowing to the right side. Is there simple solution to solve this problem? Thanks
Furthermore, several years ago when Fuel Moto did extensive testing on baffle design for slip-on mufflers they concluded that stopping up the left side even more helped performance across the board. In fact, it performs almost up to the level of a 2-into-1 system according to them. I've had 4" Jackpots on my bike for almost a year and the left side looks almost new with scant exhaust deposits, while the right side has a much darker tone.
I wouldn't worry about the inequality of exhaust flow, as I think you'll find that if performance is your priority you're in decent shape.
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Tourer
Joined: Nov 2010
Posts: 400
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From: Buckeye State
When my dyno tuner couldn't tune out the decel pop out with my stock head pipes he welded a washer in the left side to restrict it even more the id of the hole was 1/2 inch he tuned it again and my bike lost 5 ft lbs of tq can't remember hp lost but that left pipe does do something.
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The bagger rear "Y" pipe design goes back many years and as far as anyone knows, was done more for creating the dual exhaust look than anything else.
- due to the heat, most of the Y pipes eventually crack, mine did 2 times
- you can plug the LH pipe by driving a freeze plug or welding a big washer in the pipe
- I installed a V&H true duals set up
- many options for the exhaust on your bike
- due to the heat, most of the Y pipes eventually crack, mine did 2 times
- you can plug the LH pipe by driving a freeze plug or welding a big washer in the pipe
- I installed a V&H true duals set up
- many options for the exhaust on your bike
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