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Forums -> C3 Fuel, Emission Control, and Exhaust Systems
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8/29/11 5:01pm - Original Message: 'My car is trying to kill me!'
Okie Dude Lifetime Member
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Eastern Oklahoma County, OK - USA

Vette(s):
1980 Black L48 T-Tops

Joined: 1/3/2006
Posts: 1560
Ok all, as you see in the pic, I have side pipes.  The last big trip we made (Eureka Springs, last fall) Jennifer couldn't stay awake and I had a really bad headache.  Figured out it was exhaust gasses. 
 
I bear bonded the bird cage rear holes in the rear fender arches and that helped.
71Shark and I glassed in the access flaps for the rear bolts and looked for other areas but couldn't find any. 
 
I am still getting exhaust fumes in the cockpit whether the windows are up, down and/or T-Tops are on or off.  
 
The only other place I can think of is that it is coming in thru the door latches as I can feel airflow through that area year round.  I am at the point of removing the side pipes for safety's sake. 
 
I really like the look of them but don't want to take a chance on getting gassed again.  Anyone have any suggestions before I go with 2 1/2" straight pipes off the rams horns and out thru flowmasters?
 
 
                                                                                                                                                                           
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8/29/11 8:14pm - Reply: 'Re: My car is trying to kill me!'
The Rook Lifetime Member
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Pittsburgh, PA - USA

Vette(s):
1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......

Joined: 12/4/2002
Posts: 600
Recently when I was changing my accelerator cable, I noticed a few holes in my firewall that were open(no plugs). Perhaps a peek up under your dash may reveal an opening into the engine compartment.
Just a thought........

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8/29/11 10:33pm - Reply: 'Re: My car is trying to kill me!'
Okie Dude Lifetime Member
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Eastern Oklahoma County, OK - USA

Vette(s):
1980 Black L48 T-Tops

Joined: 1/3/2006
Posts: 1560
Worth a look, Rook.  I'll see what I can find.

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Dennis Smith
C3VR Lifetime Member #103

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8/29/11 10:34pm - Reply: 'Re: My car is trying to kill me!'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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Corvettes have had sidewinders on them for many years, with no issues like that. Sounds like yer engine may be a tad too rich AND you have some exhaust leaking into the cabin.
If it comes down to it, you can keep the pipes on for the looks, and run a "regular" exhaust out the back. A chambered undercar system would sound just as b!tchin as sidepipers.
Are ya'll CERTAIN there are NO leaks in the exhaust from the manifold dog nuts, and the welded(I assume) "U"s from the manifolds to the pipes? Are your pipe outlets turned down, or out?


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Joel Adams
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8/29/11 11:24pm - Reply: 'Re: My car is trying to kill me!'
Okie Dude Lifetime Member
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Eastern Oklahoma County, OK - USA

Vette(s):
1980 Black L48 T-Tops

Joined: 1/3/2006
Posts: 1560
Joel;

The pipes are turned out and down at about a 45 degree angle.  The pipe connects at the bottom of the stock rams horns via metal dog nuts.  Those are double brass nutted on.  The pipe is one piece from there to the tip.  

I think I may like the idea of leaving the side pipes on, just have to figure out how to hang them and run the real ones out the back.  

Donuts have only about 3k to 3,500 miles on them max.  I'll check them tomorrow after work and see if there is any chance of loose or leak there.  They've been checked several times.

I've got the new carpet set to go in later in the week so I can check for holes then.

I think it is running a bit rich.  Just put a new Edelbrock carb and manifold on her a few months ago.  I'll have to figure out how to lean her out a bit.  


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Dennis Smith
C3VR Lifetime Member #103

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