Why do the touring models pop and backfire?
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Intermediate
Joined: Aug 2009
Posts: 42
Likes: 1
Why do the touring models pop and backfire?
Just curious as to why my EG will pop and backfire when I put straight pipes on it, but the sportster I had with straight pipes you couldn't even make it pop or backfire? Does it have to do with that cross over pipe?
I have a fueling box and tried setting it every way possible with same results.Most popping is when I shift gears.
I have a fueling box and tried setting it every way possible with same results.Most popping is when I shift gears.
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
They all need some backpressure unless you're willing to give up performance in the low - mid range. They're called drag pipes for a reason, they are designed to perform at WOT (wide open throttle) only. Who knows why your Sporty didn't backfire, maybe enough restriction at the head pipe, either way, drag (straight) pipes suck if you're looking for streetable performance.
Road Master
Joined: Jun 2009
Posts: 1,117
Likes: 5
Low end torque.....lower back pressure reduces low end torque but increases flow and HP at the upper rpm ranges. Also has to do with length of the exhaust and pipe diameters in comparison to engine displacement.
Road Warrior
Joined: Jan 2008
Posts: 1,405
Likes: 6
From: Portland, Oregon
My sporty will backfire a little if I am coasting or not on the throttle.
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Road Warrior
Joined: Sep 2006
Posts: 1,379
Likes: 13
Typical dealer reply, ''aw, they all do that''. 
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unburnt gas in the exhaust. when you decell pop pop. a sert will help but not fix. my good friend has the thundermax and he get no poping at all and our bikes are set up the same way. 95cid se heads reinharts.