everywhere i read and search comes up confusing as hell. i have a ls/vtec with pr-3 pistons and a b16 head. I read mixed topics claiming pr-3 are 10.1, 10.5 or 11.5 compression. My friend (dturbocivic) did a quick compression test wich hit 270 giving me the idea the compression is 11.5 range. what would you say is a safe boost range. im thinking between 3 and 6. Right now i barely have the boost turned up at all ;P waiting to get it tuned.

 

put that boost up to 10 get it tuned and call it a day. i bet it make over 300

 

Use this to calculate your compression ratio
http://www.c-speedracing.com/h...c.php

And then do as was stated before, just get it together and have a good tuner tell you when to stop. PSI won't break it, HP will break it. I would just be careful of how agressive the tune is because a bad tank of gas can kill a high compression motor a lot easier than a low compression motor, less room for error in the setup.

 

thanx thats good info to know.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dturbocivic &raquo;</TD></TR><TR><TD CLASS="quote">put that boost up to 10 get it tuned and call it a day. i bet it make over 300</TD></TR></TABLE>

i got a appointment friday with j-k ;D