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One dude said 14:1 compression is like 280 psi not sure how accurate this is,haven't tested it yet cuz i still need parts. I'll let u know how many psi it makes when it's finished?You will have the added bonus of your engine running cooler though. It's a shame race gas is so expensive. As a side note do you know how many pounds of compression you have? I have saws running close to 200lbs on 98 octain. I don't know what it comes out to in compression ratio.