Ive recently got my twincharged ( m90 and 69mm gt45 ) 2jz running again. This time around its got 10:1 compression on 25psi boost. Ive been tuning it on 98 and 50/50 water/methanol.
Total 98 flow is around 1500cc to 2200cc depending on rpm ( 5000 to 7000 ). I started spraying 1800cc/min, 1500cc direct port and 300cc pre turbo but still had slight signs of sparkles on the plugs ( no audible, well by ear ), so I upped it to around 23-2400cc by adding a second pre turbo nozzle and upped the pressure a little which has seemed to work.
It had me thinking how much you would have to inject to keep up with E85's knock limit. As at the moment I'm injecting technically M30, M40 plus the water. Or over 100% water/meth to fuel.
https://www.youtube.com/watch?v=awHJHKUOx_g
Cheers