I am about to buy a b13 turbo, and I plan run it normally aspirared on

carbs,Do I need to modify the motor.

Patrick

Not if you don't mind being down on power a bit. The rotors are lower
compression.

Paul, you had a chart on here some time ago that showed that the lower compression ratio really doesn't affect power all that much in certain speed ranges. Also, lower CR engines may tolerate more advanced ignition timing, restoring some of the "lost" power.

Jon

 
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