back pressure.....
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Cargo Master
Joined: Sep 2003
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From: TX
back pressure.....
i have been hearin that not enough back pressure can wear down on ur engine quickly. well AFTER i cut out my glass pak ive been hearin this and ive never really understood what back pressure does exaclty for ur engine. can some one please help me understand what it does and also if not havin a glass pak will effect my engine. its the stock exhaust so its single and the tip ends amost flush with the back of the cab.
thanks for ur help
thanks for ur help
Elder User
Joined: May 2003
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From: Wichita Falls
someone correct me if im wrong. but i think back pressure is when the exhaust gases can't flow out properly and this keeps the engine from getting fresh air and etc. like it should and interferes with combustion.
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From: MA
Re: back pressure.....
I have never heard that. Backpressure is needed...to an extent. It all has to do with the exhaust gases maintaining enough velocity to make it to the tailpipe. How do you keep velocity? Run either smaller pipes, or a bit more restrictive muffler. Since you have cut the 'pack out, do you plan on putting anything else in its place, or run straight pipes? You should be fine either way with the stock exhaust.
Rich
Rich
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From: Copley, OH
Re: Re: back pressure.....
Originally posted by wheelMA1
I have never heard that. Backpressure is needed...to an extent. It all has to do with the exhaust gases maintaining enough velocity to make it to the tailpipe. How do you keep velocity? Run either smaller pipes, or a bit more restrictive muffler.
I have never heard that. Backpressure is needed...to an extent. It all has to do with the exhaust gases maintaining enough velocity to make it to the tailpipe. How do you keep velocity? Run either smaller pipes, or a bit more restrictive muffler.
Since pressure drop is a function of pipe diameter^4 and velocity is a function of diameter^2, small changes in diameter can yield big changes in pressure. An exhaust system that is large enough to give good flow velocity at 6000 RPM will be too large to give gooat 2000 RPM and low rev performancemay suffer. That is the origin of the "engines require backpressure" myth.
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Cargo Master
Joined: Sep 2003
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From: TX
yea im just gonna leave it a strat pipe. theres about 2 ft of pipe after it comes the 2 manifolds come into one pipe, if that makes sense. the pipe is 2 1/4 inch dia. so would what i have be better for high revs or low....this back pressure stuff is intresting.
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Posting Guru
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From: N. Florida - The "No 4x4
Well OK.
Then just . . . NEVER MIND.
I am completely at a loss now to figure out how this board works. Is there any list of common netiquite rules it is OK to utterly ignore on this particular board, or is it something you learn from experience around here?
Thanks in advance Guys.
Then just . . . NEVER MIND.
I am completely at a loss now to figure out how this board works. Is there any list of common netiquite rules it is OK to utterly ignore on this particular board, or is it something you learn from experience around here?
Thanks in advance Guys.
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From: N. Florida - The "No 4x4
Originally posted by Torque1st
Moved to proper forum from GC.
Moved to proper forum from GC.
It lead me to believe this was not the proper place to post replies.
However, more were posted even after it being pointed out that the thread had been moved. So I'm confused.
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From: N. Florida - The "No 4x4
Originally posted by modru2004
perhaps you haven't thought of the fact that maybe it was moved from another forum to this one?
perhaps you haven't thought of the fact that maybe it was moved from another forum to this one?
Duuuuuuh
I would have expected the Admin message to say: "Moved *here* from . . " because it addressed engine performance, I figured it had been moved to the "engines" area.
My most sincere apologies, Gentlemen. Really.
Last edited by ctfuzzy; Nov 3, 2003 at 07:16 AM.