If you keep a little water in the mix you can lean it out a little with out an issue. I run my truck at about 11.5 A/F with meth normally but I have leaned it out on the dyno before just to test it and it is a huge difference in power. From 10.9 to 12.0 A/F was about 40rwhp on my truck at 13psi. I also have my timing set to start pull timing at 100 degree IAT in case something happens to the meth setup. I had an injector clog up on me at the track running 17psi and it didn't hurt the engine since it was pulling 8 degrees of timing.

 

I retuned back to 11.5 on mine.

 

Im running a DO10, DO14, and a D07 nozzle..
it will suck 3 gallons down fast if im not careful!
Comes on 10% at 4-5psi and 100% at 15psi, straight M1? or M2 methanol. i cant rem, we have a 55gal drum of it.

My target AFR is 11.2 from 4000+rpm

 

thats a lot of meth. i think you might have a problem. ever thought of getting help. my DO 7 and 10 together will go thru it fast, can't imagine a 14 on top of that.

 

I had it setup to start spraying at 2psi and 10% and it would suck it down some kinda fast towing.
retuned it so it will only spray at the highest boost with my cutout closed. Last a whole lot longer!!!

Stock48 is spraying equiv to 3 DO14 nozzles.