Hello


Some of you may know me for being a DIY'er... And I havent done anything in a while so I figured you guys would love this one.


I have been hearing alot about using the stock windshield washer system as a pump and tank. Now alot of us have heard of using the tank. But the pump you ask yourself..? Yep, So first thing first was to test the pump and its psi capabilities.

My Pump tested in @ 35psi with a 37psi spike @ activation. So what the heck are we gonna do with a 35psi pump when everyone else sells 150-250psi pump for $100+..?

YouTube - Water injection nozzle testing on stock washer pump.

Hmmm that dont look bad at all. What alot of companies dont mention is the 3,5,7,10,15 gph nozzles there selling you are rated @ 40psi & 100psi (see below) now since im looking for about a 7gph @ 100psi im going to choose the largest of the three nozzles i listed. Its rated @ 9.49 @ 40psi since im pushing a little over 30psi thats the one i used.


So your gonna want to disconnect the stock washer line near the pass shock tower.


Then re-route the line towards the front hood latch area like so.


Then locate a spot for the nozzle and use the nylon hose to go from stock washer line to nozzle.



Then I used a fuse tap and ran power from the fuse box to one side of the Hobbs pressure switch. Then used another piece of wire and ran it to the stock + wire on the pump. I cut the red wire and kept the stock ground.







Parts list.


Hobbs adjustable pressure switch. Part # 701-1575 This switch IS adjustable! Pop off the rubber cap on one end and adjust away I set mine to 5psi. Price $30





McMaster Carr Small Nozzle P/N 3178K75 3.1gph@40psi, 5.0gph@100psi

McMaster Carr Medium Nozzle P/N 3178K76 6.32gph@40psi, 10.0gph@100psi

McMaster Carr Large Nozzle P/N 3178K77 9.49gph@40psi, 15.0gph@100psi

Price $5 ea. Can be oredered from McMaster-Carr




Female 1/8 Pipe Elbow (90*) Price $5

Male Quick Connect 1/4 OD to 1/8 Male NPT Price $2



Nylon Tubing 1/4 OD 10ft roll Price $5







Have fun! Im running 50/50 alc/water I DO NOT KNOW WHAT THE MAX % SAFE ON STOCK PUMP I figure winter -30 fluid is close to 40% alc so im thinking 50/50 will be ok.

 

My only question would be is how long will the pump last. If you think about it, the pump is really never used for that long on a car, nor that many times over all haha. If you think about the extended use/heat that it could generate from running for back to back to back / track use etc it might be to much for the pump but I don't know. Other then that thought, this looks amazing man and great idea haha. You always amaze me with the things you come up with haha.

 

So when you do that is it running all the time or how does it work? Noobie <<<<< Sorry lol.
I'm just very interested by this but then i wont have anythings to spray my front windshield anymore. What if a bugs hits its it I'm doomed lol

 

Nice work!

 

The reason for running the high pressure pumps is to atomize the fuel, not just spray in a large amount.

My Methanol kit is a DIY kit, but using a cooling mist pump.. same pressure switch and McMaster Carr nozzles though. =)

 

The pressure switch is what tells the pump to turn on. He has his set to 5 psi, so any time he boosts over 5 psi it will turn the pump on. Normal part throttle driving the pump will be off.

 

Nice write up! I have been thinking of ways to do this as well, but was trying to tap into the wires in the steering column for the spray activator. My problem was no matter what I did the windsheild wipers would go 3 times (or however many times they go when you use the spray) every time it activated, which of course wouldnt be a good idea when your WOT. But going straight to the pump is a good idea.

 

yep this is all things to consider. anytime an injection kit of some type is being used it is very important to have a way to monitor Kr. I use a interceptor with the annunciator set-up to monitor knock over 1* so if i had ANY type of failure and i was getting Kr i would instantly be alerted by the bright red shift lights. (I recommended this running inj or not)



That would be a great upgrade. Sometimes i just get bored, and i start tinkerin and this is what i come up with.

 

yep, go straight to the pump and even use the stock ground wire just cut the red and it wont do that anymore.

 

Very cool! I'm tempted to do something similar now except make it an intercooler sprayer. I live in Phoenix so I guess I don't need the windshield washer fluid that bad.

 

I did this first with No positive results. all my testing showed that i could complete a 1-3 pull before it even started to show a difference and i was already off the gas.

Then i turned it into a inj kit and saw almost 40* less of peak Iat-2 and was able to add 3-5* timing from 16* to 21* in the 4-7500rpm. This alone dropped my 40-110mph time by a good amount.

 

Cool. Well I am definitely doing this while my car is parked for winter now. Except ill be doing just straight water through a small nozzle simply for cooling purposed since im on E85

 

I wish i had E-85.. CA FTL

 

We discussed this already...it involved stealing a truck remember?

 

whats funny is i looked into it after that... closest spot to me is a little over 50 mi.

I can get a 55g drum for $15 and a hand pump for $35. I have a truck i could use to make the gas runs but then my cobalt would be limited to a short radius.

But from what i understand, i could just bring a laptop and my hpt and flash in a gas tune if needed.







So tempting for the huge gains but also a huge pain in the ass. I guess you could say im still thinking about it. I was thinking about making the nec changes to run E85 but run a gas tune for DD and have a E85 tune for the track/racing. Its not that big a deal to un hook the fuel line and jump the relay with a wire to drain the tank right quick.

 

Yeah if you have the patience to drain the gas and add E for track days it would be nice for that. Sucks that the closest station is 50 miles away though, sort of takes the daily driving possibilities on E85 away.

 

um, I have nothing to say about this, just shocked at the responses.
There is a reason the pumps are @250 psi.
but whatever, years of research by these companies don't mean much

 

not when you got cheap as kids trying to make methanol kits for 50 bucks paul, I forsee many lsj's going bewm in the near future

 

same here, just hope they don't bring em to me to fix lol.


things usually cost money for a reason.

 

i give an A+ for ingenuity. I do know alot of vdub guys do this with their 1.8t's... I suppose if you wanna be like them haha. But in all seriousness. The higher the psi of the pump the smaller the droplets and the more atomization. To the eye that spray may look sufficient, but under a scope those drops may be much larger than the drops of fuel coming out of the injectors...which will cause poor mixture and more unequal flow to all cylinders. Props for doing this though. Reminds me of hooking up a relay to the windshield wiper stalk. Flip a switch nitrous is armed, flip another switch for the relay and the wiper stalk no longer works the wipers hahaha. Seriously I did that. Dumb but worked...for a time. Guess thats what i'm getting at here, yes it will work, yes its cheap but it comes back to the three truths of racing.... cheap, fast, reliable, you can only choose two.

 

sooooooooooo atomization means nothing?

all these years i though it ment something.

thanks for opening up my eyes. TO THE BUICK CHOADO BOY! WE'RE GOIN TO HOME DEPOT!

 

A toast to all the Douchebags!! Happy Bird Day...YouTube - Kanye West - Runaway (Feat. Pusha T) Final Version [ New Video + Lyrics + Download ]

 

a meth kit is not something to cheap out on if you are running a good amount of meth and are pushing your car limits and it fails you will blow your motor if you dont notices in time