Quote:
Originally Posted by kern417
I'm struggling with that, because you need fuel for boost and E (octane) for timing. So I don't understand how adding more boost in the 19-20psi range would limit your timing. MHD OTS maps run 17-18psi on stage 2 93 already. There's more capacity in the turbo with the fuel to support it, i.e. hpfp.
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You aren't fully understanding it. Boost needs octane too. We know the turbo can do 20-21psi with an E mix if you have proper fuel pressure. If you run 20-21psi on 93 you would have 0 or negative timing so you don't blow up your engine due to knock. So what I'm saying is that you do run out of octane before your run out of fuel pressure when on 93 only. If you are on 93 and have no fuel pressure issues, why would a hpfp upgrade help? Why else would people be running E30 if you could max out the stock turbo on 93?