Quote:
Originally Posted by G35guy84
Probably an oversight on my part, but if Lou is going TT, then why get a 2.5" exhaust versus 3"? I wanna know because I've got the F.I. 2.5" exhaust and I plan to go TT in the future and wanna know if I could get away with it without having to buy a new exhaust system.
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Quote:
Originally Posted by NYBladeZ
2.5" is sufficient but 3" is ideal its possible Lou just preferred the sound of the 2.5" but with turbos the bigger the exhaust diameter the better
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You're both right. In most cases, we recommend a 3" diameter exhaust to be used with TT applications. Most turbocharged vehicles from sports cars to diesel trucks benefit from larger diameter exhaust, mainly because turbochargers flow a much greater volume of exhaust gases than a naturally aspirated engine. So under full boost, the turbocharger needs flow as much exhaust gas as possible to continue to spool as quickly and efficiently. However, some customers prefer the 2.5" look and sound to the 3" True Dual, and they may sacrifice small amount of top end power, but the smaller diameter exhaust usually produces a bit more low end torque than a 3" exhaust car.
Short answer, both 2.5" and 3" work perfectly fine with turbocharged cars.
Quote:
Originally Posted by roplusbee
Not sure how much of an impact a 3" exhaust will have on a 3.7L 6 cylinder, but when I installed a 3" (upgrade from 2.25") on my S13 (CA18DET), I lost all guts down low and it went bananas while in boost. That being said, I am sure the 3" exhaust will have benefits once in boost. Not sure how it will affect low RPM though.
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You had a CA too?? That's awesome! I had a CA in my old S13 Fastback, and I loved that engine! My "baby RB", as I called it.
^Ahh, memories. The turbo feel, high revving, signature CA "tilt"...
Sometimes I really miss that old car.