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I see from HPA’s Introduction to Engine Tuning course, that I’ve just purchased along with their Tuners Starter Package, where Andre had stated that using a high octane fuel like VP Racing's with a 120 octane rating can add 50% to 100% more power to even a stock engine! Of course, that’s what Water/Meth Injection can also do as it can raise the octane rating of even 87 octane pump gas to over 118 octane—the power increase coming in both cases from advancing the ignition timing.
Note that with Water/Meth Injection I will be able to match, or even exceed the power gains of forced induction, and all without the added expense.
I’ve installed a Snow Performance Stage 4 Injection System on my car, with port injection, and haven’t activated it yet because I need to finish my HPA courses first and learn how to integrate the Snow Performance Stage 4 Controller’s stand-alone ECU tune with my HPA-correct tune for maximum, and safe, power. And that implies incorporating some sort of fail-safe mechanism which I hope to learn about here.