If you know the max duty cycle of your injectors and their flow rate you can work out the max fuel flow, normally you want to inject around 15% of water based on your max fuel flow.
Best bet`s trial and error with some tuning, what works for one engine may not be the best for another.
Good idea to try more ignition advance, the WI may allow you to do this without knock.
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VW Mk2 Golf 16VG60 - Mitsubishi GTO TT
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