Originally Posted by
Nepharius
The guys down at HPF did me a solid and played with it for a bit to get the meth going at the right PSI, then did some bonus dyno runs. They did play the tune to see what hp gains could be made. I've got a dyno graph with 3 runs on it as follows
Tuned for 98 Octane
Meth Running
Meth Running Timing Advanced 2 degs
With timing advance I got about 3 kw, without timing advance but meth running the car is pretty much the same, maybe a tiny bit lower.
As for power gains due to reduced evaporation before entering cylinder, isn't that one of the advantages of the DISI engine? My understanding is the fuel is injected directly in instead of mixing beforehand.
If you just want meth for hot days and to help cooling then go for it, but I just thought I should give you a realistic idea of what meth can and can't do for your car. It probably won't give you any more power, but it will prevent you from losing it as the system heats up. Could change depending on what you run in your system. I'm a lazy guy so mixing 50/50 by weight is a hard task so I do it by volume. I'm also running methylated spirits (ethanol) instead of methanol due to the fact it is substantially less poisonous and much easier to acquire. If you do use actual methanol be really careful and only mix outside in a well ventilated area because of fumes.
Also your car will smell a bit like a drunk homeless dude if you drive it hard with meth injection going :P