Ported LIM plus front PEM test data
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Originally Posted by hawkjet
Agrazela, could you elaborate on what you mean by "tuned"?
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Originally Posted by TJ'sblackbonne
Here is a link to a test done by someone on clubgp, http://www.clubgp.com/newforum/tm.as...mode=1&smode=1
I might've gone the PLog route, but:
1) $120 was too much for something that (til that thread) hadn't a shred of backing data
2) $30 for a home-ported PEM was more budget-friendly
3) I can port the EM I took off the '98 for the '04 (making that one effectively free)
4) I've gotta keep my engines looking absolutely bone stock because of the CA smog inspectors
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Originally Posted by willwren
Ag, High flow cat and PEM'* WITHOUT adding material under the chin on the front. He is an L36.
(Boldface added by me)
I wonder how much the aftermarket cat had to do with it...time to scour the CA regs to see if there'* any way a high-flow cat can be legally put on my car :?
#45
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Originally Posted by BillBoost37
Then the question is.. how much reduced backpressure are we willing to give up, because backpressure at the DP is being seen as torque to a degree.
Just want to clear up the confusion some people have here where they think some backpressure = more torque, this is completely untrue.
#46
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Jason, this is a fairly common term in the automotive world. A smaller exhaust WILL have a higher backpressure. Think about it. You have a 2.5" pipe flowing at 100cfm. Now open that up to 3" and feed it with the same 100cfm. Which has more velocity AND higher pressure?
Physics 101.
Physics 101.
#47
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We're saying the same thing, different terminology i guess.
I understand that too large a pipe will hurt CFM, and inturn scavenging effects of an exhaust system, but it'* my understanding through many sources, that backpressure is a restriction exclusively. using a 2.5" pipe over a 3" pipe doesn't give more backpressure, unless it'* too restrictive for the given flow.
I understand that too large a pipe will hurt CFM, and inturn scavenging effects of an exhaust system, but it'* my understanding through many sources, that backpressure is a restriction exclusively. using a 2.5" pipe over a 3" pipe doesn't give more backpressure, unless it'* too restrictive for the given flow.
#48
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You clearly stated above that you'd give up all the backpressure in the world. Go 4". That'll take care of it.
You are making corrections to terminology used in this topic, and are wrong in doing so. Backpressure, in the sense it was used in this topic, is the same thing as increased exhaust gas velocity. They are INTERRELATED. The author'* INTENT was correct.
Back on topic. I just needed to clear the air of some misconceptions there.
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Originally Posted by agrazela
Originally Posted by hawkjet
Agrazela, could you elaborate on what you mean by "tuned"?
You tune a guitar to get the strings to play the right notes. You tune a radio to hear the radio station. You tune an exhaust system to have the pipes the right length for the RPM. You tune an intake for the same thing. Or you can give your car a tune-up. You can even play a tune. :?
Exactly what is a "full tune"?
I'll stay tuned...
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Originally Posted by hawkjet
Originally Posted by agrazela
Originally Posted by hawkjet
Agrazela, could you elaborate on what you mean by "tuned"?
You tune a guitar to get the strings to play the right notes. You tune a radio to hear the radio station. You tune an exhaust system to have the pipes the right length for the RPM. You tune an intake for the same thing. Or you can give your car a tune-up. You can even play a tune. :?
Exactly what is a "full tune"?
I'll stay tuned...
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