Methanol/Water Injection

[Subaru4Life]

Hi everyone, I've recently purchased a 1999 legacy gtb rev A, ej208, and am thinking of building a water/methanol kit for it. From what I've read the w/m injection can help keep your cylinders and pistons clean and also cools everything down A LOT. With this temperature reduction, apparently there's a gain of horse power as well. They also are supposed to prevent pre- detonation/knocking, while running on poop gas.

The spray nozzle would be put into the throttle body elbow.

Does anyone here have any knowledge of w/a injection on a stock EJ208 and the effects it has? Are these kits still useful on our lovely boxer engines? Hopefully (if others think its a good idea) I can install it and then others can install one because of this thread!

Edited April 26, 2015 by Subaru4Life

[Kiwi_Fozze]

i would imagine the only way to really get the most out of it would have to be with an aftermarket ecu, and i don't know of anything that works well with the twin turbo legacies unfortunately. would be a damn good excuse to convert it to single turbo then go from there

[Subaru4Life]

It would be a separate system and I would not touch the ECU. I don't know if the ECU on the 1999 REV A will auto adjust to the seemingly higher octane fuel or not. Like in modern cars... (I don't know if 1999 is "modern").

The only thing that would be connecting it to the car is a pressure switch connected to boost/vac source on engine.

[tydon]

i dont think you would see much of a benefit on a stock motor and ecu but hey you never know till you try lol

[Subaru4Life]

It just seems like it will help the engine stay healthier since it will always be cooler. I'm going for reliability more so than power gains. Haha.

[loner]

water injection is a huge can of worms... much better off with a really good catch can setup... 98 fuel, uprated intercooler.

[Guest]

Unless tuned correctly you could end up doing damage. Just add 5% eth in tank or whatever to bring it up to 98 spec.