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Expert: - 12/30/2004


Question
I am building a 615ci (4.6" bore and 4.625" stroke) drag racing engine, compression: 15:1, I was wondering what type of supercharger to use (12 or 14 -71), also what gears should I use in my tranny (1-1.7) and rear end (4.56-5.57) for ultimate 1/4 mile performance, if you need more info ask, thanks.

Answer
Hi Jay:

Sorry I can't help you , but I have two suggestions.  

First get ahold of Summit Racing on their tech line.  Their guys do know their stuff.   Their web page is <<www.summitracing.com >>  Look for the tech line phone number.  It's a long distance call, but worth the trouble and cost. Also I have a distant friend who builds drag motors out west.  Randy Cooper, write to him at <<fastcash@cehighperformance.com>>  

Finally, there's a guy here locally that has worked in that end of racing, but he's going to be away for a couple of weeks.  If you still need help by then, write me again and I'll try to pick his brain a little.

Good Luck

Dan Liddy
Sarasota, Florida  

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Dan Liddy

Expertise

Anything concerning race cars, 20 years competition experience, Senior Competition Driver Instructor , car builder, mechanic, welding, fabrication, tuning , engine modifications, set up, suspension design. Specializing in Datsun/Nissan products. Please submit questions about RACE CARS ONLY. No street cars, no video game scenarios Thank you.

Experience

I have been racing for 20 years, I have been the Central Florida SCCA Regional Championship points for 5 years running, and won the championship in my class 2 times. During my first start in the 60's I won many solo awards and the State Championship Drags. I serve as a senior instructor for SCCA, and have taught in Mercedes AMG events at Daytona, and Dodge Viper Days at Sebring International. I have been in the thick of the competition for all of my career. At one time or another I have driven race cars at speeds nearing 195 MPH. It's quite a ride !

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