BMW 502 Race Preperation

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Make It Purdy, As We Say In Texas

Wheels are a dress-up item but also potentially a performance enhancement item. The 502 came with a 41/2 inch wide wheel, not the right path to modern handling and stability. The wheels needed to be steel and not aluminum, to withstand the rigors of Mexican potholes and 'topes', or speed bumps. Carrera rules specify a maximum wheel size of 6" X 15", but what should they look like? As a matter of personal preference, I decided that they should be of period appearance—they should look like they belong on a car from the '50s. I chose CRAGAR wheels (a rare, back-of-the-factory-parts-book option: stands for Complete Rim Assembly: Groovy, As Required) because they looked strong and had round spokes to go with the roundness of the car. After buying eight wheels and having a machine shop modify them to fit the 502 bolt circle, I talked to some drag racers who tell me that the Cragar centers are not steel and that they are, in fact, brittle. Oh, well. They may not be great wheels, but they were expensive and we've got a lot of them. We also chose a set of high traction Hoosier tires and a set of Yokahama AVS Intermediate tires to mount on the wheels. 

     Body preparation was next. All 502s have rust, and this one was no exception. Rust repair was done at the bottom of the front fenders and at a few scattered other places. One such place was the firewall. The stock battery location is on a shelf at the firewall and 40 odd years of battery acid leakage had left little of the original metal. We cut out the remainder of the shelf and replaced it with an aluminum panel. The rear fenders required slight recontouring for tire clearance, and this was done by combining the original fenders with the spare fenders from our parts car. Careful welding allowed this to be completed with minimal body filler giving a finished look that's hard to spot unless a stock car is nearby. Another optional and unnecessary step happened at this time. We had the sunroof installed from our parts car, thinking that it would make the car cooler inside---interior temperature being a known problem with these cars.

With the car completely emptied, scraped and sanded, the inside of the body and trunk were painted a clean and bright gray color. Remove-able panels were also fabricated at this time above the transmission area and new seat supports were installed to hold some old comfortable Koenig seats we had at hand. Then the car was sent out for a month to receive a fresh silver paint job at Rob's Paint and Body in South Austin. At the same time the bumpers were sent out for silver powder coating.

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Terry Sayther Automotive ©MMIII. This page was last modified on  01/08/2007 01:59:56 PM   Questions?  Email eags