There is no "SET" amount of additional boost you can run with the addition of meth. Every forced induction system produces a different amount of pounds per minute of air. The thing to do is start tuning at a safe level of boost and keep bumping up timing until your Air/Fuel guage starts to show lean or better yet tune on a dyno so all engine perameters can be monitored. Your tuner should know all of this,and I doubt he would provide you with a tune that would be dangerous to your motor. You'll know exactly how much boost you can run once you see the dyno graph! Methanol has an octane rating of about 105 so it won't really matter if you run 100 octane vs 93! Obliviously you'll make more power on a race gas tune vs. a pump gas tune but are you will to pay for the luxury of race gas 24-7? Just make sure your fuel system is up to the task of such a big blower.
Last edited by bluebeastsrt; 04-28-2015 at 12:38 AM.