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If you’re not going E85...stay in the 9-10:1 range. If you are going to do E85...then you’d be smart to be in the 10.5-11:1 range.
There’s a good highly technical article out there somewhere that explores what’s better...more compression and lower boost...or lower compression and higher boost. The conclusion of it is that your always better lowering compression and turning up the boost. Some argue that’s old school and that these new engines and heads are so efficient that you can up the compression. But most people also want E85 too.
Fun topic to research. Tough to answer. I’m contemplating the same thing.
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