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1Greyteg · 03-13-2002, 08:59 PM

Ahh and then we could develop this into the ever popular exhaust velocity and backpressure post of SHO version 3!

As an addition to Tuan's posting.

Since we are thinking of the Cat as an addition to our catcack or header/cat/catback,

Think of it this way, If you got a header of larger or similar diameter as that of stock, all header dynamics aside, doesn't it make sense that since you are freeing the exhaust gas flow that you would want to free the flow from the header collector to and through the cat and on to the catback exhaust and ultimately out through the muffler?

In reality the cat will only assist in a mere 1-3 HP, "not even a noticeable difference" but, just as I and Tuan stated, you are Not getting the Cat alone for HP/TQ gians. You are getting it to complement your H&E setup and allowing the highest amount of exhaust gas to exit at it's highest possible velocity.

This is in simple terms, and Not trying to confuse it with completely explaining or understanding the exhaust gas velocity & backpressure theory or the need or design of a high performance header, cat and catback exhaust.

Like he said, don't just add up different mods and think that since they might individually gain as much as 12HP that if you combine 2 or 3 or more that you will gain 50 or so HP. It ain't gonna happen, especially with bolt on's.

Good luck,

A.

03-13-2002, 08:59 PM	#6 (permalink)
1Greyteg S Zero Racer Join Date: Feb 2002 Location: Phut, the Shuk Up! Posts: 2,812 Car: Mods:	Ahh and then we could develop this into the ever popular exhaust velocity and backpressure post of SHO version 3! As an addition to Tuan's posting. Since we are thinking of the Cat as an addition to our catcack or header/cat/catback, Think of it this way, If you got a header of larger or similar diameter as that of stock, all header dynamics aside, doesn't it make sense that since you are freeing the exhaust gas flow that you would want to free the flow from the header collector to and through the cat and on to the catback exhaust and ultimately out through the muffler? In reality the cat will only assist in a mere 1-3 HP, "not even a noticeable difference" but, just as I and Tuan stated, you are Not getting the Cat alone for HP/TQ gians. You are getting it to complement your H&E setup and allowing the highest amount of exhaust gas to exit at it's highest possible velocity. This is in simple terms, and Not trying to confuse it with completely explaining or understanding the exhaust gas velocity & backpressure theory or the need or design of a high performance header, cat and catback exhaust. Like he said, don't just add up different mods and think that since they might individually gain as much as 12HP that if you combine 2 or 3 or more that you will gain 50 or so HP. It ain't gonna happen, especially with bolt on's. Good luck, A.