Right chaps need a bit of help am currently running 15 psi with the following mods on my series 2, piper cam & pulley, stage 3 turbo, stage 2 gasflowed & ported head, grs front mount with twin 9" spal fans, turbosystem's chip, k&n, magnex exhaust and bailey breather. Rebuilt not long ago with oversized pistons etc, question is i want woodford garage to turn the boost up am i right in saying 20 psi would be ok?? everything has been checked and all is in good order, any help would be much appreciated.