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914World.com _ 914World Garage _ Conversion "factor" for turbo's

Posted by: Mueller Jul 29 2003, 07:22 PM

Ben, or anyone else that might have this handy.....

What is the normal conversion factor used when placing a turbocharged car in with normally asperated cars?

I want to say it was in the 1.5 to 1.7 range. Is this also based on a specific boost level and VE of the motor?

Posted by: TimT Jul 29 2003, 07:38 PM

I think PCA uses 1.4. I cant find if there is a restriction on boost levels ( Im sure they dont care if you grenade your engine)

Posted by: seanery Jul 29 2003, 08:13 PM

Touring Car Club uses 1.5x displacement.

Posted by: Brad Roberts Jul 29 2003, 08:15 PM

You can run whatever boost you want. Ask Bob Stefanowics. Start the race with 800hp and end it with 500hp by turning down the boost.

B

Posted by: airsix Jul 29 2003, 09:08 PM

My local club uses a conversion factor of 1.4, so for me that means to stay in the "under 2500cc" class my turbo has to be a 1.7 (1679cc x 1.4 = 2350cc). Even a 1.8 would put me over.
-Ben M.

Posted by: Mueller Jul 29 2003, 09:21 PM

Thanks....

It would be nice if our local PCA had the same rules...right now, you add a turbo or supercharger, they stick you in a class that us working folk cannot dream of running with

It could be a 1 liter with a turbo, they don't care, so you might as well turbo a 3.6 if you want to be competive and run up front.....

Right now, I could really care less what group I'm in since I don't see doing any real racing out on the big tracks with it....fun runs and time trials and the occasional auto-x will suit me fine