08-28-2013 | #11 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,699
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Re: Never ending quest for the best C4 ZR-1 exhaust system- Stainless Works
Quote:
1. A too flabby (rich) tune will give the exhaust more of a blub blub blub sound particularly on an incline when the MAP goes higher and RPMs drop. I like a bit of a leaner AFR for cruise. Found it tightens up the exhaust sound bringing it into a higher frequency. 2. I think the double walled construction of tips like the Z06, Corsa, MagnaFlow also help. The exhaust opening of these tips is shaped more like a trumpet while the outer portion of the tip is cylindrical. IMO, this cuts down any resonating the tip would generate. The B+B for example are single wall. AL has driven my car and BobGs car, different CIDs but both using the Z06 tips. Meanwhile Pete and Al use the B+B tip w the control valve. AL has noticed that even tho each car uses the control valve, Bob's and mine seem quieter and less resonance. 3. I think the tips should extend at least just a bit past the rear valence panel. This avoids dumping the exhaust towards the rear panel and setting up a resonance. The above are strictly based on observations involving my car and some of the other FBI ZRs. Your results may vary. Also, I have used: 1. stock exhaust 2. B+B 3rd Gen 3. Magnaflow C4 catback both w and w/o resonator 4. SW Xpipe w Magnaflow mufflers and tips/no resonator 5. Current system is Watson headers, 3" SS pipe, SW Xpipe, DynoMax Ultraflow muffs w Z06 tips and exhaust control valves. I have posted vids of the exhaust previously.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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