i bought a meth kit from
www.derekdevises.com and my friend has the same one on an almost identical setup to mine. so far he's been able to run 28psi on pump 91 octane and 100%methanol injection. 630rwhp and 500rwtq showed up on the dyno on that run.
after that we put in 110 octane and meth shooting, cranked the WG as tight as possible and it turned out 650rwhp 645rwtq at 30psi.
without methanol 18 psi would be the limit on pump gas.
also he has it setup to when the meth shoots the AEM advances timing 5 degrees. very worth the ~300 bucks for the setup