Quote:
Originally Posted by iNs0mN1a
Firstly,thank you for taking you're time to respond in such a manner 
Secondly,I don't plan to take my supra higher than 700 hp(~600 rwhp).What would you recommand for this? w/m inj kit or alcohol inj kit ?
The windshield washer fluid is supposed to have ~60% water / 40% methanol... |
Glad to help.
By "w/m inj kit" I assume you mean a water/methanol injection kit. Methanol is one type of alcohol. So a "w/m inj kit" is the same thing as an "alcohol inj kit".
For 600rwhp I recommend pure 100 (motor) octane unleaded race fuel. A "w/m inj kit" should work fine too, as long as it's properly installed, well maintained, and regularly tested. If the turbo you choose is capable of more than 600rwhp (which I hope it is not), your boost control will have to be rock-solid.
Again, you don't want the soap and the bug-melting chemicals in windshield
washer fluid running through your w/m inj pump or your engine.
I recommend 90% alcohol/methanol, and 10% water for your optimal horsepower & octane boost. 60% water & 40% alcohol is cheaper, of course and perhaps slightly higher in pure octane boost. However, octane does not = horsepower. You loose too many BTUs of heat with 60% water...and therefore too much horsepower is lost along with that reduction in heat! 60/40 might be fine for some ricer honduh or 'billy rustang owner (no offense) trying to put a hitch in his giddyap, but for an Mkiv Supra Turbo running 25psi+ of boost, it just isn't anywhere near optimal.