Hello gang!! I have a J35A8 engine which I am hoping to rebuild. I would like to make minor improvements over stock, but no forced induction at all. My question is: What is the max bore these blocks can reasonably handle? One cylinder has pretty good vertical scratches (local repair shop put a heli coil in the spark plug hole without removing the head....grrrr) which I was able to MOSTLY hone out, and this cylinder now measures 89.08 +/-mm.

 

A J35 block can be bored out to 90mm safely. I would consult P2R for additional info, as they have probably done a lot of J-series work for drag racers.

Also, see these threads for more info:
https://acurazine.com/forums/3g-tl-p...etrain-908987/
https://acurazine.com/forums/3g-tl-p...bility-913726/