Quote:
Originally Posted by steve25
Thanks much for the added CC info on the 12s and 16s!
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We Whistler'd the RAIII in the '70 Formula 400 whose engine is still 100% factory original with 47,000 miles, and never been apart, except for a new timing chain/gears/cover and fuel pump. It measured 10.0 SCR cold (60 degrees) and 10.5 SCR warm (150 degrees). A compression test yielded 175 psi average (170-180). It has the original 068 cam & lifters, jamb nuts on the rockers, etc. down to the factory jetting and beefy advance springs in the distributor.
These readings sure give credence to the #12 heads 68 cc chamber sizes from the factory and we have no good reason to not believe them on the RA engines.
Dennis