Is there anyone that would know the what the dynamic compression ratio is on a ls/vtec with 83 mm bore 11.5:1 cr pistons a milled b16 head and a spoon headgasket. Just curious whether it will be safe to run 93 octane in this thing or go higher. Thanks for any advice or answers.

 

i got 11:1 wit milled head and spoon headgasket and runs fine. 13.5:1 then u should worry..

 

what is the dome volume of the pistons...?