Tune and blower type. Centrifugals can run more total boost than a screw which can run more boost than a roots, mainly because of how they operate. But generally the lower the compression the better, since all things being equal it lets you run more boost and make more power. But there are a lot of 9:1 engines that are EFI running over 10psi with intercooling on pump gas. Blow through carbs and intercooling can run upwards of 15psi or more on 9:1 without issue.
My view is if you're building for boost, you might as well shoot for 8:1 and run more boost, though a stock block would split long before you ever hit your boost limit on an 8:1 pump gas engine.
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Who cares how much horsepower it has, all that matters is how fast it goes!
13.20's with 2.25-2.30 60's, 40+ year old suspension sucks!
Best trap 107.11mph, we'll see what the new intake/carb setup does.
12.80 at 110.5mph NHRA DA corrected
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Compression ratio help
