please share your views on meth/water injection.
 

I have heard some mixed reviews on meth, some people swear by it others say its ok for a short time and then some say its not worth it. So im just wanting to hear some arguments on why or why not to use meth.

awesome stuff, i cant say enough about it

I run 100 percent water usually, but once in a while i add some methanol. I dont notice any difference except i can smell the meth for some reason, lol. I have blown 2 motors in the last year and a half without the water injection, and this one seems to be all good running even more boost with the water injection.

Also if possible post a pic of you meth/water tanks. I bought a kit awhile back and im trying to get some ideas. if i install it that is.

I'm just going to be running my set-up through the factory washer fluid tank.

My opinion is that a properly tuned engine shouldn't need it. It's a crutch. The water is just taking up space that could be used by fuel and air.

That being said I guess water injection has it's place in certain hot rod applications.

Are you looking for some good facts on this subject or do you just want everyones i know whats best. Because there are alot of peeps on here that will give you their two cense. I don't know whats the best, if i'm correct, both methods are used basically to help move the heat out. If your running cooler, your making more power. I'm sure there is someone who can throw some numbers your way, if thats what your looking for.

I run 28 lbs of boost in my EV08 with alky injection and pump gas. I know its not the same as a rotary but it lets me run 9 more lbs of boost over stock boost levels. Its similar to running race gas but cheaper.

Jason

just a blanket, but f*ck why not?

It was good enough for World War II fighters. Intake air at 20,000 feet is def cooler than what we're dealing with. Water injection has always been viewed as experimental. I'm considering it as a cheap bastard IC replacement. At least until I can afford a big one...

I run 100% water from the washer fluid tank. My car is fully tuned with sufficient mods so I dont use it as crutch, it just like how it keeps the intake temps down. Ive seen my intake temps drop up to 10 degrees C. by just getting into boost once or twice. Apneablue dynoed his FD with and without it and only lost 4hp with it on his setup. You can probably find the thread if you search. Hes also got some nice pics of his setup in the thread.

Ben

I run straight meth through my coolingmist injection system. My car isn't fully tuned yet because I have no clutch, but I have noticed that it drops the intake air temps up to 70 degrees F. So I pretty much use it to drop the intake temps.

Jason, I guess you tuned for it since you are running more boost? I read on a water injection forum that the methanol can make measuring the a/f ratio difficult. How did you get around this?

Oh and did you get more torque as is claimed for running methanol/water injection?

Yes I tuned for it and didnt notice any problems reading the A/F. I street tuned it and havent been on the dyno, so Im not sure about the torque gains.

Jason

COol! Good info!

Go to turbobuick.com, read about the results and make you're own decision. To me, getting the same results as running 110+ octane with a well sorted WI kit is amazing, but some see that as a bandaid.

A perfect tune can't always prevent detonation. I've read cases when an engine over boosted several psi due to a non opening wastegate and the engine still survived because of WI. I call it extra insurance. It also allows you to run more boost on pump gas safely. The below link has the engine in question that survived.

https://www.rx7club.com/showthread.p...ighlight=29psi

Heres the thread, some pretty good info with dyno testing:
https://www.rx7club.com/showthread.p...ht=coolingmist

At one of the tech seminars at Sevenstock, I asked this question to Rick Engeman. He said something along the lines of "I don't know why you'd need this on a car that is tuned well."

Personally, I think it would be interesting to test water injection as a replacement for an air-to-air intercooler. I've heard of at least a couple turbo Miata guys who've done this.

-s-

I know a few people here in NZ running with the PINZ VapourJet system rather than an aftermarket intercooler.
Even after beating the cars hard, the intake manifolds are still cool to touch. Generally setup to use the rear window washer tank for water storage - keeps it away from the warm engine bay.

http://pinz.acasa.co.nz/index.php?op...d=16&Itemid=27

Will certainly be getting one myself when I rebuild next month.

I am running 21psi on 94 pump gas with WI. I am running a 50/50 water/meth mix and plan on tuning to 25psi. It does not matter how well you tune once you start exceeding 16psi on pump gas you start asking for trouble.
WI is as much of a bandaid as installing an ignition amp for spark break-up or a single turbo for more boost

I've been putting Meth in my engine for a while now. The car seems to run great, but the people begind keep running into things and actin all crazy..can't figure out why...

OOHHHH...you ment Meth-anol. Oh nevermind then.

- Phillip :bigthumb:

i guess everything can be tried in moderation. . . just be careful, and dont get yourself hooked. . .

really, i dont know why people like to call it a bandaid. . . well i could understand this. . . but when people have purpose built cars and they add this type of injection. . . its different. just like bluetII said. . . ya know, i guess porting is a bandaid too. . . cause you can make more power with larger ports.

beyond that. . . i think its funny how people throw the bandaid thing out there. . . like theyre pros of tuning and car building!!! this car NEEDS bandaids. . . piston engine powered car owners laugh at us because we run an engine that blows so easily. . . i think the entire engine needs one gigantic bandaid to wrap up in so itll just stay together.

I don't need it, so it's not "band-aiding" anything...resists carbon build-up is that a myth? or is that another bandaid?