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Custom Vehicle Discussions => Screamin’ Eagle® Softail® Springer® => Topic started by: bcnu53 on July 09, 2010, 01:13:15 AM
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I read a lot here about people retuning remapping after exhaust change
my question is do you have to re-tune if you change the exhaust?
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Most probably yes, and definitely yes if you also change the air filter.
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Lolo
thanks for the reply. 100 people looked and no one had an answer. thanks again
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EPA requirements result in Harley motors that run right on the ragged edge of too lean... ANYTHING that alters flow for the better makes these issues worse. A less restrictive air cleaner and/or better flowing exhaust push lean motors towards a dangerously lean condition. Yes, you need to remap and give some extra fuel to go with all the extra air.. A little more fuel will result in a cooler runnning motor, more power, and better MPG if done correctly...
:2vrolijk_21:
jb
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EPA requirements result in Harley motors that run right on the ragged edge of too lean... ANYTHING that alters flow for the better makes these issues worse. A less restrictive air cleaner and/or better flowing exhaust push lean motors towards a dangerously lean condition. Yes, you need to remap and give some extra fuel to go with all the extra air.. A little more fuel will result in a cooler runnning motor, more power, and better MPG if done correctly...
:2vrolijk_21:
jb
That's exactly correct, you gotta remap....and dyno if possible to tune it all in!
napalm
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I just put Bub 7 slip ons and had mine dyno tuned today!!!
Definitely get it tuned or it will run even hotter. Mine was doing the rear cyl cut off all the time n the city. Mine seems to run cooler and better and today is a hot day here today.
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Re-map and Dyno are definitely worth the extra cost to get the most out of the bike. 8)