Quote:
Originally Posted by RodKnock
File this potentially under "old wives tales" but I was "taught" that for every compression point "lost", going down numerically, you lose about 4% of your potential gross HP.
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I'd say that's probably pretty close in most examples, give or take a few percent. From what I've seen, going from around 9.5 to 10.5 is negligible. When you go from 10.5 to 12.5-13, the gain is substantial, like 40-45 hp on a 680-700 hp engine.
Ed, many companies offer billet pistons. They are getting to be pretty commonplace. When you order a custom from any piston company, you can also get them in .001" increments.
Not trying to knock Gibtec, but just saying that there are others that offer the same options.