Quote Originally Posted by Super-DA9 View Post
well from reading some of the U.S. forums and a post or two from here it seems 180-220 is healthy for B18C2/1.

the helms manual states "must be no higher than 270PSI and no less than 135PSI"

270 would not be stock compression. pretty sure stock compression is about 220 on the B18C2 and about 250 on B18C7. I think helms is just stating that it should not be higher than this on the stock engine. (assuming 270 is the max the stock block and pistons can handle maybe?)

it'd be good to get some more input from some of the admins or tech experts on our compression results and testing
most likely if it's higher than 270, it has arrived in ping city.