how much HP for this setup.
10-25-2003, 04:10 PM
#81
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Join Date: Jan 2003
Posts: 73
Originally Posted by SXN
i didnt say take off the Y pipe... i said everything AFTER the Y
N/A cars need some backpressure.
Turbo cars need no backpressure.
S/C I think need a little backpressure
Just the y-pipe is not enough pressure.
10-25-2003, 04:36 PM
#82
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Join Date: Jul 2003
Location: San Bruno, CA (SF Bay)
Posts: 3,747
Originally Posted by Nazgul350r
N/A cars need some backpressure.
Turbo cars need no backpressure.
S/C I think need a little backpressure
Just the y-pipe is not enough pressure.
Turbo cars need no backpressure.
S/C I think need a little backpressure
Just the y-pipe is not enough pressure.
http://www.ford-trucks.com/dcforum/exhaust/925.html
http://forums.audiworld.com/s4/msgs/706103.phtml
"Atmospherically inducted cars that use a tuned length system to improve cylinder scavenging (via extractors, for example) are sensitive to exhaust diameters within the tuned length part of the system. This means that the maximum effect of exhaust pulsing may come from an exhaust system that is small enough that some exhaust back-pressure is developed. However, that is a quite different concept to saying that engines "need" exhaust back-pressure! "
always been under a different impression
10-25-2003, 05:34 PM
#83
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Location: Ontario, Canada
Posts: 2,404
Originally Posted by SXN
i didnt say take off the Y pipe... i said everything AFTER the Y
i know it have something to do with resonance, but...why?
10-25-2003, 10:57 PM
#86
Guest
Posts: n/a
I really doubt resonance has anything to do with it. It's already out of the engine and there are no sensors to detect the resonance. Think of it this way, if you blow through a small diameter straw the air has more force than if you blew just as hard through a straw with a bigger diameter...
10-25-2003, 11:11 PM
#90
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Posts: n/a
I guess it's backpressure then. What I'll do, sooner than later, is get one of those exhaust cut outs from ebay. I'll install it right after the CAT. Run a 2.5-3" pipe from there
to the left side of the car where a tip will be slightly visible in front of the rear wheel...
to the left side of the car where a tip will be slightly visible in front of the rear wheel...
10-26-2003, 05:46 AM
#94
10-26-2003, 06:06 AM
#95
10-26-2003, 08:11 PM
#96
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Join Date: Jul 2003
Location: San Bruno, CA (SF Bay)
Posts: 3,747
"An old hot-rodder's tall tale: Engines need some backpressure to work properly and make torque. That is not true. What engines need is low backpressure, but high exhaust stream velocity. A fast-moving but free-flowing gas column in the exhaust helps create a rarefaction or a negative pressure wave behind the exhaust valve as it opens." lol so ivelweyz was wrong and i was right?
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