exhaust pipe set up differences
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Senior User
Joined: Mar 2004
Posts: 145
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From: Houston, Texas
exhaust pipe set up differences
does how the exhaust pipes are set up make a major difference?
ive seen some trucks with the pipes coming out behind the rear tire, infront of the rear tire, straight out the back, out the back but at and angle outward, out the back but at and angle outward AND downward. i was wondering does how the piping is set up make a difference in performance? what does having fewer bends in the pipe do? more bends? how bout shorter pipework (like when the pipe comes out infront of the tires)
ive seen some trucks with the pipes coming out behind the rear tire, infront of the rear tire, straight out the back, out the back but at and angle outward, out the back but at and angle outward AND downward. i was wondering does how the piping is set up make a difference in performance? what does having fewer bends in the pipe do? more bends? how bout shorter pipework (like when the pipe comes out infront of the tires)
Super Moderator
Joined: Oct 2002
Posts: 8,547
Likes: 6
From: MA
Well the optimal performance exhaust will be a straight pipe (or no pipe at all...think dragsters). A bend in a pipe is nothing more than a point of restriction. Mandrel bends help this versus standard pipe bends. The best exhaust system will allow for high exhaust velocity. The way that most systems keep the velocity up, is to reduce the pipe size. As for tips, that is sometimes just purely for cosmetics. You might see downturned tips on offroad trucks (that way, constant exhaust pulses, keeps the engine from hydrolocking while fording a river, etc). As for a shorter pipe, logic tells me it would be preferred, because it would eleviate the exhaust pressure more rapidly than a long pipe. Most dont run it before the tire because of noise, smell, and sometimes legal concerns (here in MA, you cannot have an exhaust outlet something like 6" away from your last functioning window).
Rich
Rich
Elder User
Joined: Jul 2004
Posts: 560
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I just put a Flowmaster 40 series delta flow SI/DO on my '88 F-150 5.8L and turned the pipes out in front of the passenger wheel with 3" tips. I like it. Looks different than most, saved me money and I think that's about the only way I can hear my exhaust inside the truck.
Good news, I'm running my AC less.
Bad news, I'm having trouble keeping my foot out of it listening to the pipes.
This has been a short term thing, but I have seen no downside yet. Had it for a month and no ill effects from the exhaust exiting where it does.
Good news, I'm running my AC less.
Bad news, I'm having trouble keeping my foot out of it listening to the pipes.
This has been a short term thing, but I have seen no downside yet. Had it for a month and no ill effects from the exhaust exiting where it does.
