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#19 (permalink)

07-17-2008, 03:47 PM

ItBites

CC Member

Join Date: Oct 2003

Location: Queen Creek, AZ

Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection

Posts: 906

Not Ranked

I use the Dynomax bullets with the 3" ID on my 540 cid that makes 540 rwhp. They are not any louder than the other BB cobras in Phoenix, until I pass 4000 rpm, then it just screams. I had a high compression (12.75:1) engine before; it was louder at idle - crackled... This new engine is 10.5:1 and runs on pump gas and the sound is more mellow. The exhaust sound level is not just a function of the muffler, but also compression and cam overlap.

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E. Wood
ItBites
10.69 @ 129.83mph - on pump gas and street tires

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