na with the decompression plate your car should run fine at 15-17 psi just run it rich and pull the timming a bit for those hot summers we had a dsm and we ran it at 20 psi 270 hp on 91 octane with 100+ degree weather out here we just ran it rich. its all about tunning when it comes to higher HP you could have a engine that could hold 3 gazillion hp and blow it up at 100hp if its tuned wrong
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