I have a b16 block with a b17 crank and b17 crower rods, i'm sending the block to get sleeved and was going to purchase some pistons what bore will make good horse power is 84mm to much is 82mm to little is there a sweet spot for the bore size. Help would be appreciated.
BTW it's going to be a turbo motor and i want to keep it a high reving motor.

 

If I was you I would go with the 84mm to start with, that way you leave some for future rebuilds. I have the same, B17 crank/rods, someday I will have mine sleeved and go for the big 84mm/85mm max sleeves.