Water/Meth Injection

[Intothenight19]

For those of you that are currently using and/or have used water/methanol injection on the 7m, I'd like to ask your opinion on the effectiveness of the system. Would you recommend it? If so are you running the sprayer off a pressure switch, and at what psi are you spraying? I make about 400whp now at 15psi and was wondering if water/meth might be a smart route to go? Im aware of its purpose and function, I would just like to get some opinions from current users to see if its worth it. Thanks all...

 

[peteyturbo]

You will see the most benefit from meth/ water/ alky on high boost or a really agressive tune, it looks like it would be great for your setup since you have an upgraded turbo..Look into the Perrin alky injection kit, it is new and I have heard great things about it running off of an injector driver for volume...You need to set it up correctly to avoid cyl wash out and afterburn..If I were you I would stary spraying at 10 psi and have the setup done right and dyno tuned..There are alot of lack luster kits out there so do your research..
BTW car sounds sick, what part of pa. do you live?

 

[mk3ukr]

Better use progressive kit instead of "on-off" system. I use Derek Devices kit with Snowperformance progressive controller, works great for me. Ran 1.8bar of boost on pump gas (70/30 meth to water mix) You will have to advance timing and lean out fuel map to take full advantage of MW injection.
Read WI forum http://www.aquamist.co.uk/phpBB2/

 

[Intothenight19]

Peteyturbo: Thanks for the reply, Im hoping to get a nice W/M kit as soon as I bolt on a few other things. I live in Douglassville btw bout 45 mins west of philly, and am always looking for some fellow Supra enthusiasts to cruise with.

Mk3Ukr: Thanks for the reply also, i was looking to go with a progressive kit, only because I believe it would be more beneficial than just spraying completely at a preset pressure number. Thanks for the info, I was looking into the Devils' Own progressive kit, looks to be a good deal for around $300.00. I will read the link you sent me and thanks again both of you!

 

[supra90turbo]

Paging Mr. Scott Henessey

look up hottscenessey (i think thats how it's spelled)

 

[logan]

Something i learned at that aquamist site ( damn that place is dead ) ... is that you have to increase the pressure by x4 in order to achieve twice as much flow .

The reason that is important is because if you want to spray meth at an increasing rate according to boost . Like 5% meth at 10psi , 10% at 15psi a progressive controllers flow envelope is no where near wide enough to achieve that .

Just figgured i'd mention my findings as staged should perform better , well , according to my math it does any way

" Garret T04R P-Trim " <------ please , do you have a dyno sheet from that ?

 

[Intothenight19]

No dyno sheet at the moment, I have no clue where my first sheet got to. Im not running a lot of boost, so its a minimum efficiency right now. And I have a stock intercooler with some hard piping so Im most likely blowing hot air. Once I get a couple other things on the car I'll definitely post up a dyno sheet. As far as the water/meth is concerned, I am surely looking into it as an option, and hopefully a progressive controller will do the trick.

 

[logan]

Here's a nozzle flow chart just for reference . When looking at the gain in flow vs psi you also have to factor in the max psi capability of the shurflow pump to see how much flow you can flow , or how much of a flow envelope is possible .

- from the devils own website


max psi
M2 nozzle with 1/8 ID hose 180psi
M3 nozzle with 1/8 ID hose 160psi
M5 nozzle with 1/8 ID hose 135psi
M14 nozzle with 1/8 ID hose 105psi
Open hose 1/8 ID 40psi.

 

[logan]

Yeah yeah , you'll probably be fine as alky is suppose to be very forgiving . If you want to chart how much your flowing though, those charts will come in handy .

When you find that dyno chart ....

 

[hottscennessey]

Paging Mr. Scott Henessey

look up hottscenessey (i think thats how it's spelled)

LOL, yes I'd definately say that meth injection is one of my favorite mods. I ran it on the 7M, as did Mike (Malloynx).

I ran a 14GPH nozzle, which allowed me to take out about 20% of my fuel w/ 550cc injectors, and an SP61GT at 21PSI. The fuel was taken out using the "trigger" setup on the MAF-T. Very simple setup. This was using a kit from devilsownonline.com

For my next setup I'll be using the same kit on my 2JZGE, but I'll be using dual 14GPH nozzles since usually people are pulling around 25% of fuel.

One thing to note.. alochol injection must be tuned (I used my WBO2). It will definately clean your internals.. I noticed smoking after a few months of running the shit out of my car. I think it was from cleaning the old engine of carbon deposits which helped my piston rings seal.. causing some smoke.. still I had perfect compression across the board. (Just speculation.. I also had a dead turbo.)

The meth I used was walmart's windshield washer fluid (the WINTER mix). It's roughly 40% meth 59% water (good combination). The rest is just detergent and blue dye which can't hurt! I know it works.. because I spiked to 26PSI one night when I was not tuned, and there were no signs of detonation.

 

[supra90turbo]

Yep, I heard that the blue windshield wash is the best stuff to use. Not only is it a perfect mix, but it's around a buck a gallon, and can be found anywhere.

I would like to be running meth injection on a DD supra in the not-too-distant-future. It is, hands down, the best way to run high boost on the street for cheap.

 

[peteyturbo]

Just a precautionary that everyone should know, injecting meth has long term effects due to it's corrosiveness..You want to be sure there is NO afterburn and noting is injected at all after you let off the gas..There are a few people in the evo community experiencing problems due to the long term effects of running meth, it does a number to your cyl walls, especially if you run a high concentrate or repetative use..Other then that, you need to be SURE the seals in the pump are compatible with meth, many pumps are not to be used with meth but ok for water and alky..

 

[hottscennessey]

Good point Petey. Running 100% meth will also void the warranty on some sureflo pumps, depending on the retailer. It's been proven that a 50% 50% mix is most ideal anyways.

 

[peteyturbo]

50% is ideal, but the evo guys just want to run 30+ psi and straight meth on they're daily drivers:aigo: You won't catch me doing that, thats for sure..I know some people can get carried away..

Good point Petey. Running 100% meth will also void the warranty on some sureflo pumps, depending on the retailer. It's been proven that a 50% 50% mix is most ideal anyways.

 

[SupraDupra500]

I have water/meth injection on my supra. i love it. right now im running 17psi and pulling hard. i also added a little bit of timing. working out great! mine is a devil's own single stage non progressive kit. i havent taken away any fuel as of yet. once i upgrade my turbo again ill get a progressive kit.

i know what you mean about the EVO guys. a friend of mine has one..
GT35R, 850cc's, AEM EMS, all kinds of other stuff.. he ran 29psi daily. had 2 "backfires" through the intake manifold.. one blew the manifold in 2 pieces and the other bent the throttle plate in half. He has since gotten rid of the alky injection and converted to E85 and has been running 30psi daily and put down 535AWHP.

I love this type of injection system. instant race fuel more or less! Very good mod

Josh

 

[Trojaneagle]

Has anybody tried to use WI to get cheaper gas at the pump?
This seems like a good idea but you're only saving a few bucks at the pump arent' you?

 

[SupraDupra500]

i use 89.. midgrade to save a few bucks because i live in the country and drive a while to work. about 40 miles round trip every day. I just have the injection set up to come on at like 7psi. EGT's are good, a/f ratios good. i dont see why not, unless someone proves me wrong. anybody have other input on this?

Josh

 

[tekdeus]

Does the extra cooling you get increase your HP at, say, 15 psi vs without using it at 15 psi?

 

[hottscennessey]

minimal power gains from cooling the charge.. cheap high octane fuel is the main advantage.