[keithmac]

I found after a bit of testing 75%methanol - 25%water mix was best for my engine to control knock (flowing 1.2l/min), I changed to a Shurflow pump. My engine must be octane limited by the looks of it, I run BP Ultimate petrol - 97 ron or slightly higher. 10psi and under it needs no det control, after that I need something to stop knock or else I have to retard timing 6 degrees which kills the power/ engine responce.