Corvair Exhaust Systems and Components

 

I have been interested in tuned exhaust headers for some time. Most of the widely available header design information focuses on peak horsepower for drag racing. Since I have always been more interested in autocrossing, my focus was on maximizing the area under the torque curve over a broad range of engine speeds. This led to much longer than normal primary pipes. I started with 44 inch long primary pipes and later shortened the primary pipes to 40 inches after a changing camshafts. The primary pipes for drag racing headers tend to be 32 to 34 inches long. The primaries were made from 1-1/2" diameter tubing, the smallest diameter tubing I was able to find at the time. I have since learned that 1-1/4" or 1-3/8" tubing would have been more appropriate for the 164 cubic inch engine.

Here is an early version of the headers I made for the Deserter. The glasspack muffler was race only because of the noise level. I used a "turbo" style muffler on the street.

Here is a more recent version with SuperTrapp mufflers. The SuperTrapp mufflers weigh only 4 pounds each compared to 12 pounds for a turbo muffler.

Here is the drivetrain out of the car showing how the headers wrap around the rear suspension area.

Rear view

This is a concept for shorter length tuned headers with merge collectors for the Deserter.

This is an equal length tuned header system with merge collectors designed to fit in a late model Corvair.

The stainless steel components and a lot of hand fitting make these systems very expensive.

Here is a modified commercial header for comparison. These are short and not equal length, but should produce a power increase over the stock log manifolds and are more likely to fit the average Corvair owner's budget.

 

 

 

Those who say it can't be done, should get out of the way of those who are doing it.

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Last Update:   May 18, 2009 5:26 PM
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