Water/Meth injection under FAST SFI TBI set up????

Depending on your; Dcr, cylinder pressure,and possibly quench, you may never need it

EG; If you get a big enough cam to put the Dcr under 9/1(sealevel) with aluminum heads, you will probably be able to run 87E10 on the street. IIRC I ran 185psi no problems