Super dumb but I have to ask.. testpipe
09-22-2009, 07:39 PM
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Re: Super dumb but I have to ask.. testpipe
No thanks haha
09-22-2009, 08:02 PM
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Re: Super dumb but I have to ask.. testpipe
So it sounds like you need a resonator in your exhaust somewhere, not a test pipe. Gutting a cat would not do the same thing.
09-22-2009, 08:19 PM
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Re: Super dumb but I have to ask.. testpipe
with the cat there is no rasp at all. only with the test pipe in there was
09-22-2009, 08:27 PM
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Re: Super dumb but I have to ask.. testpipe
The cat is smoothing out the exhaust flow, which is the difference. Resonators have a RPM band that they are tuned for (you might say it's the 'resonant band') and they don't work as well when you are above or below that band. The raspy area is a hole in the resonant response, and the cat is smoothing out the individual exhaust pulses enough that the resonator doesn't respond the same way.
If you have a fairly stock B16, the cat probably isn't doing too much to hurt power output, and if you like the way it sounds with the cat, keep it.
If you have a fairly stock B16, the cat probably isn't doing too much to hurt power output, and if you like the way it sounds with the cat, keep it.
09-22-2009, 08:47 PM
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Re: Super dumb but I have to ask.. testpipe
The cat is smoothing out the exhaust flow, which is the difference. Resonators have a RPM band that they are tuned for (you might say it's the 'resonant band') and they don't work as well when you are above or below that band. The raspy area is a hole in the resonant response, and the cat is smoothing out the individual exhaust pulses enough that the resonator doesn't respond the same way.
If you have a fairly stock B16, the cat probably isn't doing too much to hurt power output, and if you like the way it sounds with the cat, keep it.
If you have a fairly stock B16, the cat probably isn't doing too much to hurt power output, and if you like the way it sounds with the cat, keep it.
http://www.youtube.com/watch?v=gAQ_k...om=PL&index=40
http://www.youtube.com/watch?v=4qgN1aVvPkE
09-23-2009, 04:43 AM
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Re: Super dumb but I have to ask.. testpipe
Frictional losses from an exhaust? What?
So putting on a test pipe gains 5HP, but then something else takes away 4HP? So if you gain 1HP, you didn't gain 5HP because you wouldn't be able to measure the 5HP if you only gained 1HP.. So you gain 1HP. Not 5.
And why would you lose 80% as friction anyway? That would mean a B16 makes 800HP but only puts out 160 because of friction (do the math, it's the same ratio). Something about the tiny size of the OEM radiator doesn't make sense all of a sudden if 640HP is lost as friction (heat).
So putting on a test pipe gains 5HP, but then something else takes away 4HP? So if you gain 1HP, you didn't gain 5HP because you wouldn't be able to measure the 5HP if you only gained 1HP.. So you gain 1HP. Not 5.
And why would you lose 80% as friction anyway? That would mean a B16 makes 800HP but only puts out 160 because of friction (do the math, it's the same ratio). Something about the tiny size of the OEM radiator doesn't make sense all of a sudden if 640HP is lost as friction (heat).
09-23-2009, 09:52 AM
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Re: Super dumb but I have to ask.. testpipe
The cat is smoothing out the exhaust flow, which is the difference. Resonators have a RPM band that they are tuned for (you might say it's the 'resonant band') and they don't work as well when you are above or below that band. The raspy area is a hole in the resonant response, and the cat is smoothing out the individual exhaust pulses enough that the resonator doesn't respond the same way.
If you have a fairly stock B16, the cat probably isn't doing too much to hurt power output, and if you like the way it sounds with the cat, keep it.
If you have a fairly stock B16, the cat probably isn't doing too much to hurt power output, and if you like the way it sounds with the cat, keep it.
someone need to +rep Fabrik8 for this.....i would ..again...but cant
this statement he made is very enlightening..