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#11 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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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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#12 |
![]() Join Date: Jan 2015
Location: Illinois
Posts: 83
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#13 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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It's an FBI innovation. mike100 has added his own little spin on it w rpm and manifold pressure control. I'm using a console mounted On/Off switch.
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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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#14 |
![]() Join Date: Jan 2015
Location: Illinois
Posts: 83
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#15 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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I will let Dom explain his set-up but most the guys here have the NPP Valves with slightly different pieces:
One guy has a B&B with a Stainless Works X-pipe and NPP With B&B Mufflers/tips.. Another is B&B 3" pipes, Custom resonator/ X-pipe with Dynomax mufflers with NPP and Z06 tips Now I know most search out the Z06 muffflers and use the tips/valves, but I have seen the valves on eBay for about $100 each I am the black sheep of the FBI group.. motor is still mostly stock and I am using Corsa. I have no drone at all. Now, drone is very subject and depends on the person. Dom's car still has some drone ( to my ears) but not nearly as bad as without the NPP Valves. My ears are quite sensitive (genetics unfortunately) so for me the Corsa fits the bill and I think if you heard Dom's or any of the others here it would help you decide if that is the way you want to go
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#16 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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Edit: as Jeff said, my system is made up of Watson 1 7/8" headers, Stainless Works Xpipe, using 3" SS pipe and dumping into the aforementioned mufflers. I typically ride around w the valves closed. I flip a switch to open them up for performance reasons.
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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 Last edited by XfireZ51; 02-01-2015 at 11:27 AM. |
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#17 | |
![]() Join Date: Jan 2015
Location: Illinois
Posts: 83
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#18 |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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My first time around with this modification, I used C6 muffler parts -the entire tip and vacuum actuated exhaust flapper.
If I ever do another one, I would try to get the same type of valve used on newer BMW's. Quite a few models have them now. They are a better valve since they don't rattle. A lot of the used C6 NPP mufflers you find for sale are warranty repaired C6 units that were swapped out at the dealership due to noise (so buyer beware). Also don't forget the entire exhaust systems expands when it gets up to operating temp so make sure to leave room for that. mounting the valve to the side is the safest bet. |
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#19 |
![]() Join Date: Jul 2012
Location: Allentown, PA
Posts: 309
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In a few weeks I will have a set of B&B Fusion (dual mode) mufflers complete with solenoid valve and key fob wireless remote available for sale. One of the mufflers has an internal rattle that could be fixed by someone with access to a good TIG welder. The other muffler has been cut around the back face in an attempt to find a rattle in it. (And, no, it's not the valves rattling.) The tips are traditional B&B oblong shape but double wall, sharp trailing edge. Everything is polished. Very sharp looking! If someone is interested in either repairing the mufflers or using the tips, valves, wireless set-up, let me know and I'll send pics and a price. Switching to Stainless Works Turbo S-Tube mufflers.
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'95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP. |
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#20 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,696
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Dennis,
U coming to BG this year?
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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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