87 octane is a difficult one to estimate because not many people use it. I take a guess, W80/M20 at 10% W/F ratio will probably raise a 1 to 2 points. If you can 50:50, at 20% W/F ratio, you can gain around 4 octane point.
To work out W/F ratio, divide M5 by the total flow of all your injectors I cannot work out the flow of the M5 until I know your fluid pressure.
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Richard L
aquamist technical support
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