I have BMS meth kit with AEM nozzle. Used WW tank as meth tank.
I don't think it is worth the benefit. You shouldn't use meth while tracking anyway. No point in daily driving either.
I tried 50/50, 70/30, and now using 100% meth. You get 1 extra psi of boost for all the hassle. You can only benefit (probably ~30hp max) from it if you make a rolling race, that's all.
Go for e85 fuel instead and a custom flash with proper fuel map that goes with it. You'll make way more power.
P.S. Meth in WW tank makes me psychologically uncomfortable.
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2011 BMW E92 M3 ZCP - Jerez Black/Black/Carbon, Carbon roof, DCT, EDC, M Performance Exhaust
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