Tuning for water injection: fuel, ignition, and EGT

[Richard L]

Thank you guys for chiming in.

I often wonder how difficult is to to tune to towards MBT with different burn rate, bore/stroke and combustion chamber design. For day to day and non-crucial tune (based on a square bore/stroke ratio), I think I would work on pump fuel plus 50:50 methanol/water and try to get the best possible outcome, because all the ingredients are easily available. This is what we have been trying to do all along.

I am hoping to find a way improve the flame speed on 50:50 mix and gain MBT without over-advancing the engine, do you think a small percentage of nitromethane will alter the flame speed in the right direction?