need something cleared up once and for all.....
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Senior User
Joined: Oct 2005
Posts: 128
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From: mission, tx
need something cleared up once and for all.....
i have an f-250 sd 5.4, and im planning on doing some exhaust work.
does the truck need SOME exhaust restriction or not.....
ive heard both....and frankly, im really confused
does the truck need SOME exhaust restriction or not.....
ive heard both....and frankly, im really confused
Posting Guru
Joined: Oct 2003
Posts: 1,955
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From: Quesnel, BC, Canada
I would just worry about getting a good hi-flow system built, and not worry about scavenging, bacpressure and all the other exhuast fine tuning aspects. Your engine if far from a race engine, where these types of tuning would be more relevant.
Over the years between mustang boards, bronco boards, mazda mx6 boards, and the FTE boards Ive paid attention to the topics I mentioned and have concluded that unless you got some race-built engine, the benefits are minimal.
Now of course the same rules still apply to headers where long tubes help your low end, shorties help top end. Pipe size isnt something to go crazy about, on a moderate engine I would personally always side on the larger pipe due to the fact it will flow more, and when compared to stock more is ALWAYS better.
Over the years between mustang boards, bronco boards, mazda mx6 boards, and the FTE boards Ive paid attention to the topics I mentioned and have concluded that unless you got some race-built engine, the benefits are minimal.
Now of course the same rules still apply to headers where long tubes help your low end, shorties help top end. Pipe size isnt something to go crazy about, on a moderate engine I would personally always side on the larger pipe due to the fact it will flow more, and when compared to stock more is ALWAYS better.
Posting Guru
Joined: Jun 2002
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From: Rio Rancho USA
Originally Posted by pud
on a moderate engine I would personally always side on the larger pipe due to the fact it will flow more, and when compared to stock more is ALWAYS better.
Posting Guru
Joined: Oct 2003
Posts: 1,955
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From: Quesnel, BC, Canada
it would sound good and give you better throttle response than stock I would think, plus net you a couple more ponies and ft/lbs. No "upgrade" is going to decrease performance under stock levels, ie: better flowing muffler, headers, larger pipes etc...
I personally dont believe the velocity/scavenging argument all to much. All purpose built race engines run open headers. Monster trucks, sprint cars, many different types of 1/4 mile race cars etc...plus the more you can flow the more velocity you can build IMO.
I personally dont believe the velocity/scavenging argument all to much. All purpose built race engines run open headers. Monster trucks, sprint cars, many different types of 1/4 mile race cars etc...plus the more you can flow the more velocity you can build IMO.
Last edited by pud; Nov 19, 2006 at 02:04 AM.
