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#1 |
![]() Join Date: Nov 2016
Location: Florida
Posts: 66
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I hit a little bit of a roadblock with my Watson headers on the passenger side. I have removed the manifold, which has a triangular flange on the end of the manifold pipe. I had to hammer this off, but this flange wont fit on the longtube header. Keep in mind at some point in time the manifolds were switched to '95 manifolds; my car is a 91. Here is a pic.
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#2 |
![]() Join Date: May 2007
Location: Addison IL
Posts: 241
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The three bolt flange was used at the factory for '90 to '92 exhaust systems. In '93 the flange was eliminated and the connection to the exhaust manifold is a slip fit. The '91 flange was installed on your '95 manifold so that the '91 exhaust system would still fit.
With headers a roughly 10 inch long adapter pipe is needed on the right side. I believe that all of the Watson adapter pipes had a three bolt flange to connect to the exhaust system. A Jeal adapter with a three bolt flange will probably fit with a little modification. The currently available Stainless Works adapter pipe will fit except that it has a '93 - '95 style slip fit to the exhaust system. You will need to weld on a three bolt flange to fit it to the '91 exhaust system. |
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#3 | |
![]() Join Date: Nov 2016
Location: Florida
Posts: 66
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Thanks for the reply Marc! Im trying to fit a smaller tube into the header then sliding the flange onto that same tube to connect them but no one carries 2 3/4 pipe. Im wondering if I can cut that manifold pipe and use it as such.. the bend in it may complicate things though. Sent from my iPhone using ZR-1 Net Registry |
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#4 | |
![]() Join Date: Nov 2016
Location: Florida
Posts: 66
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Also; on the passenger side it looks like someone spliced the o2 sensor wire to the crankshaft sensor wire? It is very odd and im wodering if it can be a problem? The car runs fine as is. Sent from my iPhone using ZR-1 Net Registry |
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#5 |
![]() Join Date: Jul 2012
Location: Allentown, PA
Posts: 309
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Auto Zone usually has 2 3/4" straight sections (around 18" long) of exhaust tubing on the shelf. Swaged on one end to slip over 2 3/4".
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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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#6 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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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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#7 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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You might be able to use a flex pipe from a local auto parts store until you can get an exhaust piece made; the crank sensor and O2 come in through the same area from the front of the car, I don't think its spliced
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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