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I'm preparing to install some JE 9:1's. I agree with AzHeat's comments. The big concern is that running high boost X higher compression pistons means exponentially (a bit) higher compression at the top of the RPM band as compared to stock 8.5:1 compression. I will be running HKS 2530s. I guess my take - I plan to run water injection, which will help with detonation when running high boost. Timing won't be too radical. Will definitely run 93 - 94 octane in addition to water injection. My major concern is the actual cylinder pressure if I decide to run 23-25 psi of boost. I don't want to break engine internals or blow head gaskets. I haven't figured out how I will tackle this yet, but I'm thinking that if detonation is controlled, I should be able to run a high quality head gasket and be fine. The TT stock crank is obviously forged, I have eagle forged rods, and forged pistons. I guess I should consider main/rod bearings that will accept the additional load. Again, haven't figured out the fine details yet. AND - maybe this is overkill for running 9:1 and HKS2530s
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