4 - 4.5 should work, start with the timing low on 4 FDR, give a good few minutes on track then temp the motor. I use my fingers but you can get those IR guns pretty cheap now. if it's getting hot already increase the FDR and try again. When I'm happy with the temp I start adding the timing. You really need to race it now to put the motor to the test before adding or removing anything else
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