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I just got a water / meth injection kit, and after doing some research I think I've come up with a decent plan.... Just wanted to bounce it off the masses before I start drilling holes.

  • FP Big28 turbo (rated for 37 lb/min)
  • 660cc fuel injectors (not sure of IDC yet)
  • 20 psi (currently)

I've got a Snow Performance progressive controller. My plan is to install an M5 (6.7GPH / 422.7 ml/min) nozzle in the FMIC outlet pipe, and another 175ml/min (2.8GPH or ~M2) nozzle about 6-8" pre-turbo, all with a 50/50 water & methanol mix.

The pump will be mounted in the rear using the stock windshield washer reservoir, and I'll use a DevilsOwn check valve & dual-nozzle kit.


  1. Do these nozzle sizes sound about right for my setup?
  2. Any concerns about vacuum pulling fluid out of the short sections of tubing between the nozzles & check valve?
  3. Can siphoning occur through the check valve under vacuum (pre and/or post turbo)?

Thanks.
 
We didn't adjust the pumps when we send them out. They will vary. You will need to hook up a pressure gauge and adjust the hex key if your wanting a specific psi output.

"No, you can't use it because on the low end its not going to send enough voltage to power the pump. Thats the reason us and the rest of the alcohol injection companys use pwm to run the pumps. So the pump always has full voltage we just pulse it to slow down."

100% will sometimes make more power but there is also other things that need to be taken into consideration. these kits are designed for a 50/50 mix. Higher amounts will not hurt our kits nor should it cause them to wear quicker. the deal is the pumps we use along with all the other alcohol injection company's is the pumps are not explosion proof. It is possible for internal sparks and the flash point of straight meth is high enough that there can be issues. Now that being said many people do go against our recommendations and run straight methanol. Which is fine but we are not responsibility.

See the reason most make more power with the straight meth is too many people have that if a little is good more is better. So they tend to pop larger nozzles in than they should and end up with to much water getting in the cylinders, So instead of putting in the right size nozzle they change the % of meth and run more and the car starts to run better. then they look at there 02s and they are rich so they pull more fuel. then they decide to try and even larger nozzle. because its got to make more power, and its a cycle. Which for many does make more power. the deal is these systems are not like fuel injectors and precise measure the fuel as its injected.


the boost a pump starts out at what ever voltage it sees 13.5-14.0v and boosts it up to 17.5v with the knob full turn. it doesn't lower the voltage ! i have mine wired up so that the boost switch kicks on the boost a pump which turns the alky pump on and the solenoid at the same time ! seems to work for the first 8-10 runs little to no knock !
 
can i run 100% meth injection using the windshield washer tank? or will that mess up the windshield washer pump's?

i think that it would, but i figured i would ask
 
Ok this is a little wierd, My name is Chance too! From what I read when meth injenction was first talked about was that you could use straight windsheild wiper fluid. Doesn't it contain something like 50% h2o, 49%methenal, and 1% of other?
 
yea the -32 degree windshield washer fluid is 50/50 i believe.

ive been running 100% methanol for almost a year now with my EvoIIIGT Chinese knockoff 16g anywhere from 27-30psi and i tuned it quickly for a 10.9 AFR recently, timing is around 15 degrees with no knock. had it around 11.4 before i installed headgasket and studs to be safe and havent had the motivation to tune it since. feels pretty quick but ive lost 1st and 2nd with 235's attempting to hook up.

16g turbo, 550cc's at 80% IDC, 10.9 AFR (innovative wideband), one 10gph nozzle, pump at 150psi. should i be tuning for more timing with more fuel? or same timing with a leaner tune?
 
yea the -32 degree windshield washer fluid is 50/50 i believe.

ive been running 100% methanol for almost a year now with my EvoIIIGT Chinese knockoff 16g anywhere from 27-30psi and i tuned it quickly for a 10.9 AFR recently, timing is around 15 degrees with no knock. had it around 11.4 before i installed headgasket and studs to be safe and havent had the motivation to tune it since. feels pretty quick but ive lost 1st and 2nd with 235's attempting to hook up.

16g turbo, 550cc's at 80% IDC, 10.9 AFR (innovative wideband), one 10gph nozzle, pump at 150psi. should i be tuning for more timing with more fuel? or same timing with a leaner tune?

A 16G at 27-30 psi at 10.9 AFR, and 550's running only 80% IDC's?

Just out of curiosity, how much air are you flowing?
 
A 16G at 27-30 psi at 10.9 AFR, and 550's running only 80% IDC's?

Just out of curiosity, how much air are you flowing?

I'm not him but my S16G at 25-27psi at 11.0-11.5 AFR with 650's at 70% IDC is flowing about 36lb/min
 
Hope this helps you guys out
 

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Not really... That list is so old... Walmart doesn't even carry the Supertech brand anymore. Most of the MSDS sheets I have found online just by searching for the brand.
 
when in doubt get the cheap brand, Usually it has the most meth and does not have any of the extra crap.
 
Alright i have been looking into building a water or methanol injection for my car and have found a decent design. The only problem is i am worried about how to control the flow and how it will effect my car.
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The switch that they are using in this kit is a Hobbs pressure switch part # 701-1575, and is supposibly adjustable. and they are using a SHURflo pump #8009-543-236, along with a mcmaster carr water solenoid P/N# 7876K12. I have tried to do some extensive research and there is alot of information out there but i feel it is very opinionated, and need a little help bringing this setup to what will almost be a close to perfect setup in my car. Therefore trying to think of most of the possible problems that i may encounter before i install it since i am very new to the meth injection scene and don't feel confident enough to go into this blind and possibly water lock or destroy my motor at the moment. Any help from anyone that is running a meth kit or has done a little research on them would be greatly appreciated. I am very curious to find out how large of a nozzle people are running and how they are accurately controlling the flow and pressure of these systems without running digital injection.
 
Looks like you done you research on the basic, but just buy a kit to be on the safe side. A progressive controller that injects more or less according throttle and whatnot will do wonders.
 
the only problem is that a actual kit cost hundreds, say 400 dollars, I also looked into it a little bit more and i believe that the pressure switch that i have listed is vacuumed controlled, and adjustable so that would help to tune that in a little more closely depending on when i want it to come on. I'm curious as to weather there is a cheaper pump out there that would do the same. For example would a windshield washer pump be able to do this job and be more compacted and easy to hide then a big pump? I am just confused as to why the pump has to be so large.

I mean think about it when you spray your windshield that is a very good mist with good pressure but will the size of the nozzle determine as to how much will be sprayed at once or will there need to be some sort of pressure regulator for example on this.

i just looked into the windshield washer pump a little more and the pump that is listed above is a 1.8gpm pump which is very large, but on the other side i have found washer fluid pumps that go up to 3 gpm i mean is this possible? This is very interesting and confusing topic!
 
A windshield washer water pump isn't going to work. It's not powerful enough and won't spray into throttle body.

yea, that pump wont cut it

my methanol injection pump, is adjustable from 150 to 250PSI, i have it set at 200 psi.
 
k that's pretty reasonable. So is this setup listed above a reasonable design or is it way off compared to what you are running i'm trying to do this on a lower budget, if i had to money i would go with forged internals and so on but this is the only thing i can really afford to do at the present time.
 
what would you recommend for the lowest amount of psi for this to even be functional?

sorry bout before i for some reason didn't take into consideration that there would need to be that much pressure for this system to run operationally.
 
The injector nozzle will require a specific amount of pressure to spray correctly. (not unlike your fuel injectors.) The washer pump will not build enough pressure. GPH is measured free flowing not restricted, therefore a higher GPH pump is required for the nozzle to spray and to flow. I'm not sure how it's done, but the progressive controllers provide more flow at higher boost and RPM levels. That, to me, would be worth the wait (to save up) and the money. Good luck with your project.
 
ok on that note is anyone running a progressive setup and if so what was the price that you payed and the quality of the systems.

and how does the progressive system operate?
 
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