Hey guys, been reading up on this some, and I think I might put a water/alky injection system on the 20B car. However, im cheap and im not paying for it, i'll make my own. My rough plan as of right now is to use a small sized (~200cc maybe?) fuel injector and my LTX12s's auxilary injector controller to control the amount. I havent seen anyone using this method, is there some reason why it wouldnt work?

thanks
Pat

 

i take it by your small injector sizing that you plan to run water. . .

it's my understanding that the only thing you'd have to do to make it work, would be to find a specialty injector, compatible with whatever injectant you are using. basically, you'd just need an extra fuel setup running a different fuel . . .

provided you could find said injector (and associated fittings of course) i'm pretty sure it'd be about as easy as you think it'd be using an auxilary PWM output from your EMS. . .i was gonna do this until AQM came up with there latest and i was able to get in for so cheap. i'm hardpressed to believe that i could get it done for less any other way

good luck and keep us posted with your findings, i know you'll figure something out frugally
ryan

 

well anything should be compatible with water... i was thinking about a 50/50 water/alcohol mox tho. I might just try a small stock injector from whatever I can raid one from and see how it holds up. maybe even a 460 from a NA rx7, i have a whole stash of those. I dont suppose mounting location makes much difference, as long as its before the plenum splits, and after the intercooler, right? i guess I'll try to get it as close in as possible, maybe just before or after the TB. I'll have to look up the settings from my ECU, but I think a spare injector is a pretty easy thing to wire in...

pat

 

yeah it ought to be. . .i know it is on the haltech, and i can't imagine the microtech being all that different.

sorry for the laziness, but somewhere in here there is a discussion why standard fuel injectors are incompatible. . .i'm too dumb/lazy to elaborate. if you've got the means to, a bench test on how viable and effective a standard fuel injector is for water, alcohol, and mixes is would be a valuable addition to the community knowledge pool.

sorry for the overall worthlessness of my posts, i'm all woozy from post-surgery drugs.

ryan

 

I have pondered and mentioned this as well. It seems that one problem would be rusting of the injector. The way I was thinking of doing it would be a regular fuel pump (also an unknown on compatibility) and the injector would be ran directly with the secondaries.

 

i think the incompatability is with methanol, since it eats rubber, it would kill the seals in a standard injector. but what im thinking is, if the methanol is strongly diluted with water, i wonder if that might avoid that problem... i was also thinking of using a standard fuel pump. probably not a stock rx7 one tho, those things are big and bulky. I think a smaller one would be ok, i gotta look thru my junk stash and see what i got.

big rizzlah sorry about the surgery u get shot or something?

 

why not use a standard AI pump?

 

haha . . .it's all good, i'm not as thugged out as i lauhgably present myself in the avatar, that's funny, i actually laughed and it hurt you f*cker. . .just got hernia surgery

 

lol i was just kidding.

not using a standard AI pump because im not spending money on this. i think i can get it going for somewhere between 5 and 20 dollars, so thats my goal.

 

OT
yeah, i remember my hernia surgery, and then the recovery after- more fun than pissing broken glass.

Good times. enjoy!

 

any updates with your 5-20 dollar system patman?

 

It is a great idea, and I really hope you find some way for this to work, but my logic keeps screaming at me. If it was possible to do that so easily and cheap, TONS of people would have done it by now. But, I REALLY hope you find a way for this to work, I love the idea!

 

The issue is that an injector which see's constant contact with water will rust in no time.

Using the system with 100% meth with a meth compatible injector should be fine.

read this link: http://www.rbracing-rsr.com/waterinjection.html

 

http://www.magnusmotorsports.com/fuel/index.htm

2200cc methanol injectors....scroll part way down.

 

Well he's consistent. The big prices match his big head/ego...lol

 

eh... i never got around to it, ended up rebuilding the 20b and adding a 42r and all kinds of other ****. Ive just recently been kicking around the AI idea again, as I'd like to make 650 whp in dd form... we'll see what comes of it...

Pat

 

I don't know about doing it the way hes speaks of, but I've added auxiliary injector for free several times. You just have to be creative...

 

Not on mine!! the first AI system cost $5!! i want a refund!
J/J. That first system was defintily creative

 

Ok, no one mentioned premixing the AI? Maybe use MMO or the same 2 cycle for our motor in the water/methanol mix. That will prevent anything from rusting. And instead of connecting the injector to your EMS, try using the secondaries that way the water/methanol injected is proportional to the amount of fuel injected. All you would need that I can think of is:

Boost switch for fuel pump
Tank
Low level sensor
Fittings
Filter and anti clog

 

Good luck finding premix that will mix with a water methanol mix, with any significant amount of water.

 

haha, oil + water!

seriously though, it looks like you can probably find a water soluable oil to go into that mix

 

or......... oil + methanol? muahaha.