When Driving a Model A?

All. Great ideas. I have installed new intake and exhaust manifolds along with the new stainless muffler system when I started working on the car back in February. I can't find any exhaust leaks at the exhaust manifold. I used the Hi Temp copper sealant. I could not get the copper gasket to fit and after trying several methods I called the supplier of the new tail pipe and muffler system and was told not to use the copper gasket or the tubular insert between the manifold and the exhaust pipe flange. They said you don't use either with the stainless system. Is this correct? The tail pipe is the stock dimension as the original length of the old one I took off. Should I extend it farther back like a newer car?

I will pull the manifolds and check for cracks and bad gaskets. Even though it's new it could still have a problem. When I reinstall the stainless exhaust system system should I use either the tube insert or the copper gasket?

The fumes I get is the same as when I run the car in the garage. I can understand getting the exhaust smell in the garage but not outside or when I am stopped at a signal.

I am starting to go down the route of the carb running to rich creating excessive unburned gas. The new flow tested jets should rule that out.

Again thanks to all. Truly appreciated.
 
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JOES31 said:
I could not get the copper gasket to fit and after trying several methods I called the supplier of the new tail pipe and muffler system and was told not to use the copper gasket or the tubular insert between the manifold and the exhaust pipe flange. They said you don't use either with the stainless system. Is this correct? .
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The angle of the new manifold and the angle of the pipe should be the same and should seal just right.


Try this take some aluminum foil, fold it over 4-5 times and make a strip a foot long. Before you clamp the manifold/tail pipe together wrap the joint and then install the clamp. Take it for a drive to see what happens. This will tell you if the leak is at this joint. This is not a fix but a troubleshooting tip.
 
The copper "gasket" is worthless, in my experience. The insert tube helps, as does the paste, but the muffler flange angle has to be correct (45 degrees is what I remember reading somewhere) and it must mate perfectly with the manifold. Also, the angle of the upper muffler pipe must match the angle of the manifold as viewed from the front. And of course the clamp has to be installed correctly and fit evenly all the way around. I use a mirror to make certain of the back side fit. A fellow in our club made a special three-piece and three-bolt clamp for his car. I wish he had put those into production. It worked perfectly and was very easy to install.
 
700rpm said:
The copper "gasket" is worthless, in my experience. The insert tube helps, as does the paste, but the muffler flange angle has to be correct (45 degrees is what I remember reading somewhere) and it must mate perfectly with the manifold. Also, the angle of the upper muffler pipe must match the angle of the manifold as viewed from the front. And of course the clamp has to be installed correctly and fit evenly all the way around. I use a mirror to make certain of the back side fit. A fellow in our club made a special three-piece and three-bolt clamp for his car. I wish he had put those into production. It worked perfectly and was very easy to install.
Click to expand...

There is a top and bottom.
 
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