will the sound be different
Thread Starter
Teching In
Joined: Sep 2003
Posts: 27
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From: california.
will the sound be different on a dual exhaust system. if i use 3''inlet3''outlet dynomax bullets. will it sound different, if i use 2''1/2 inlet.2''1/2''outlet. and is there any power diff.?
Originally Posted by 00Z28 Camaro
whats the reason for 2.5 instead of 3inch 
Many (myself included) feel that running too large a pipe is not good for your car either. The gases flow slower through the larger pipe hurting you two ways. One, the lower velocity creates less of a scavenging effect, working against the virtues of having an x pipe to begin with. Second, the slowr moving gasses have much more time to cool off as they traverse your exhaust setup. Cooler exhaust is heavier exhaust and thus heavier to push through. There was just a post about a 600 RWHP car running 2.5" TDs and the backpressure was barely over 1 psi. Hardly choking the motor, id say. Also keep in mind that dual 2.5" pipes is about the same flow as a single 3.5" pipe. How many people really complain about how restrictive a 3" catback is, let alone a 3.5"?
TECH Regular
Joined: Feb 2005
Posts: 480
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From: Ft. Worth, TX
Originally Posted by GuitsBoy
Ground clearance, ability to route it over the axle, and one more debatable reason.
Many (myself included) feel that running too large a pipe is not good for your car either. The gases flow slower through the larger pipe hurting you two ways. One, the lower velocity creates less of a scavenging effect, working against the virtues of having an x pipe to begin with. Second, the slowr moving gasses have much more time to cool off as they traverse your exhaust setup. Cooler exhaust is heavier exhaust and thus heavier to push through. There was just a post about a 600 RWHP car running 2.5" TDs and the backpressure was barely over 1 psi. Hardly choking the motor, id say. Also keep in mind that dual 2.5" pipes is about the same flow as a single 3.5" pipe. How many people really complain about how restrictive a 3" catback is, let alone a 3.5"?
Many (myself included) feel that running too large a pipe is not good for your car either. The gases flow slower through the larger pipe hurting you two ways. One, the lower velocity creates less of a scavenging effect, working against the virtues of having an x pipe to begin with. Second, the slowr moving gasses have much more time to cool off as they traverse your exhaust setup. Cooler exhaust is heavier exhaust and thus heavier to push through. There was just a post about a 600 RWHP car running 2.5" TDs and the backpressure was barely over 1 psi. Hardly choking the motor, id say. Also keep in mind that dual 2.5" pipes is about the same flow as a single 3.5" pipe. How many people really complain about how restrictive a 3" catback is, let alone a 3.5"?
I guess what you mean by "Cooler exhaust is heavier exhaust and thus heavier to push through." is that cooler exhaust is DENSER exhaust and thus HARDER to evacuate. By all means correct me if i am wrong.
