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#41 | |
![]() ![]() Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
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Brett!
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1988 KOH Prototype EX5023 sold 1990 ZR-1 #444 Convertible 1990 ZR-1 Black #966 1991 ZR-1 Quazar Blue #296 1957 Duntov SS Project |
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#42 | |
![]() Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,384
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Wasn't much of a run. Frenchie never really got on it. Wish they would have let me drive. Of course there's no way to keep up with an F16 in clean configuration in a max, afterburner takeoff.
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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#43 |
![]() Join Date: Jul 2010
Location: Woodstock, Ontario, Canada
Posts: 1,275
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Even a 0-60 or 0-100mph run? I can see a car leaving harder than a jet.
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peace Paul ZR-1 Net Registry Member #1494 |
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#44 |
![]() Join Date: Feb 2014
Location: AZ
Posts: 860
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Anyone know anything about the Magnaflow mufflers that Corvette Central has? They have the black LT-series tips, so they'd match the appearance of a later Z, and they're a "straight-through" design. These on a stock system plus an X-pipe in place of a resonator would be pretty free-flowing, eh?
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#45 | |
![]() Join Date: Apr 2013
Location: South Dakota
Posts: 85
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Interesting, I was always curious how that combo worked out.
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Dr. Pete "Frankenstein's" Ported and Polish combo Cam retiming & Chip Tune Corsa Exhaust No Cat SW Stainless Long Tube Headers MSD Coils DRM Coil Overs Hurst Shifter ZF Doc Beam Plates Center Force Dual Friction |
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#46 |
![]() Join Date: Feb 2014
Location: AZ
Posts: 860
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Well, I had my stock 90 resonator replaced today with an H-pipe and I am SHOCKED with the result: there is virtually ZERO difference in sound. I don't detect any drone anywhere in the range or popping on decel, which is good, but there's certainly no additional sound. Not sure about power, as I only got to rev it to maybe 4500 afterward but I didn't detect any SOTP difference.
Looks like the mufflers do all the work on a stock 90 system. Driving it back to back, I don't see any reason for the resonator in the first place. Sure am glad this little experiment was cheap. ![]() |
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#47 | |
![]() Join Date: Nov 2011
Location: Dunbarton NH
Posts: 7,354
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#48 |
![]() Join Date: May 2005
Location: Georgia Mountains
Posts: 926
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If you had a totally stock 90 exhaust system then swapping the resonator for an H or X pipe (using at least 2.75" pipe) will free up a good bit of restriction but the remaining restriction is the stock mufflers, necked down to just over 2" and only one tip open. Changing to later C4 mufflers will free up more of the restriction without changing the sound dramatically (i.e. still stock quiet with no resonance).
For LOUD without resonance you should check out Corsa ... again, the best thing is to listen to and/or ride in Z's with the systems you're interested in. Since I first installed Corsas in a 94 LT1 I thought it would be the perfect system for my 90 Z ... wrong assumption. Once I put headers on and deleted the cats the Corsas were now too loud for my taste even though there was no resonance. I know Z-owners who love Corsas and other Z-owners that absolutely despise Corsas ... bottom line, put on what YOU like. |
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#49 | |
![]() Join Date: Feb 2014
Location: AZ
Posts: 860
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#50 |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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The kind of hp cat-backs open up is mostly over 5000 rpm on these cars. Headers help the mid-range torque situation much, much more.
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