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I have water injection. Running a bottle of NOS racing formula octane booster and 80% meth/20 % water, I have had good success holding HOM. Also, running the w/i with a mix of 100 octane, HOM holds good. I have heard of some stage 3 cars running just a bottle of Torco and no W/I and holding HOM.
Please Note: where I live the max octane is 91. However, I have found a station selling 100 octane at the pump.
w/i baby steam cleans the head whhoooooo hoooooooooo.
Yes, I was wondering about this and the comment about torco leaving deposits on the head. My guess with the W/I the head would remain
free of deposits.