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cutting 1mm off the head will INCREASE compression and make your valves closer to your pistons and if you run 20ve pistons you don't have valve reliefs
Notch the 16ve pistons deeper and get some head work done to deshroud the valves...this way you will increase the CC of the head and deepen the valve reliefs.
yes.. i porting the head as well doing the whole head job with the N1 cam and charles S/R
so i thinking to skim to get the higher compression if i use 20VE piston
but still not sure what the best option
overall people saying the shave the 16VE piston is best option i have apart from 20V piston
