Sorry guys, but this is one of those myths i mentioned in the winge thread.
Race fuel will actually lose you power. You only make power by running more compression or timing or boost that the octane allows.
The MINIMUM octane that your engine will handle gives the most power....
Racer I can't see how any fuel of a higher octane will actually lose power. Totally disagree. If you don't need the octane then the worst you will experience is no gains, but certainly no drop in power.
I've installed an MSD timing control also, and am dialling up my timing to what the fuel is allowing. Probably about an extra 5deg over what I could run before on PULP, and the results are phenomenal.
I'm putting the cooler running and smoother idle down to it just being a better / purer fuel, and nothing to do with the octane increase.
Cost me $400, after I settle down a bit will run it 50:50.
I know what 'Racer' is saying, sort of.
Let's say a given engine has say 10:1 CR and runs say 36deg total, if it runs fine on 98RON fuel and doesn't detonate, then moving to a higher octane fuel will achieve nothing.
If said engine pinged on 98RON fuel and needed it's timing retarded 4deg from the optimum 36deg, then in this case moving to BP100 will yield better performance because you could then advance timing to the optimum 36deg without detonation.
Going over and above the octane which the engine needs to run at peak performance/timing, can lead to decreased performance in some cases.
The performance loss is to do with fuel densitys.
4L I6, naturally aspirated producing 173.5rwkw.
14.410 @ 96.49mph with street radials.
What's that?..... Did I hear you say TQE power?
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