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Hello i have a question i have a 240z with an l28 swap that the previous owner didn't do engine work correctly on, any ways when the previous owner put the head on he didn't set the timing correctly and the valves hit the pistons. So when i got the car i pulled the head of and replaced it with a performance head and it runs great, but now thinking back doesn't .75 overbore seem a bit much because .040 is ideal and that is 1mm overbore then that means that a .75 overbore is equal to 19mm which is insane or is the .75 overbore already in mm but even if it is it seems insane. I shouldn't be two worried about it because my car runs great but i was just wondering. Heres a video i made of t a while back. I know it sounds really raspy but since then i put a resonator on it and it sounds way better.
