Just as a point of reference, on my Early Olds, we ran 14.25 to l compression on straight alky. We then dropped the c. r. two points and lost 55 h.p. Then we put 25% in it and gained back the 55 h.p. plus 65 more. This was with a 435 cu in (394) olds. It ran 219 on methanol, and never made a full pass with the nitro without bearing problems, which is another story that took 5 years to solve..............Bob