Sotenacious Posted January 1, 2013 Share Posted January 1, 2013 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. Quote Link to comment Share on other sites More sharing options...
Xnke Posted January 1, 2013 Share Posted January 1, 2013 L28's are regularly bored to 89mm, it's nothing to worry about. Quote Link to comment Share on other sites More sharing options...
aarang Posted January 1, 2013 Share Posted January 1, 2013 .75mm Quote Link to comment Share on other sites More sharing options...
Sotenacious Posted January 1, 2013 Author Share Posted January 1, 2013 .75mm So this means my pistons are 86.75mm? Im Quote Link to comment Share on other sites More sharing options...
aarang Posted January 1, 2013 Share Posted January 1, 2013 Most likely yes, .75mm is appx .030 Quote Link to comment Share on other sites More sharing options...
roger280zx Posted January 1, 2013 Share Posted January 1, 2013 Exactly. 1mm= approx. .040 so... .75mm=approx. .030 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.