My DIY build?

Once upon a time......

I had found a formula, that you used to find out how many ml of alky the nozzle needed to flow per cubic inch per minute....

but I can't find it now.

I guess you have to start fat and slowly lean out.

What are you using for a spray nozzle?

 

My DIY build?

thanks for posting the pics dman, that was exactly what i wanted to see, you actually have more room between the coldside and dp than i thought. also how effective is the wrap you have on the down pipe?
thanks again

 

My DIY build?

realstreet- after driving to the dyno i popped the hood and could easily grab the dp. It was hot but I could have held it for awhile.

linc- I found this nozzle at a sprinkler supply house. I have no idea how much it flows and it may not work for shit. Besides that I need to put a pressure gauge on it to find out how high the pressure is when spraying.

 

My DIY build?

ok, did some testing saturday.

I have no idea what this nozzle will flow or what kind of pressure the pump is producing but with a 2:1 water/70% isopropal mix it's knocking my inlet temps down from around 180* to 120*. I was having to use a toggle switch to fire the system which was very much a pain in the ass but I now have a fuel solenoid from a nitrous kit and a hobbs switch. Hopefully this afternoon I can wire the system up properly and get some real test results... but so far it looks promising. I noticed if I spray it when i first floor it the car doesn't accelerate smoothly but when i spray it after it has reached full boost it really pulls good.

 

My DIY build?

Julio told me 1oz/sec is ideal for most simple setups. Basically, he told me to mark where the level is on the reservior, find a long stretch of road, get it ready and do a 4th gear punch and start counting. Do this several times. Then subtract from the new fill line, use math, yadda, yadda.

 

My DIY build?

yikes! that could put a hurtin' on the head gaskets if during all those 4th gear pulls you found out you weren't spraying enough.

I think the nozzle is way too small because while i'm just driving down the road at a steady speed I can run the system and the car only bogs down alittle. seems like it should bring it to it's knees when not under WOT.... but until I get everything hooked up properly I can't make assumptions.

i guess i could pull the inlet pipe off and hold it over a jug and fire the pump for 10 seconds and measure the amount that came out. but i seriously doubt i'll see 10oz's after just 10 seconds of spraying. anyway, thanks for the info, once again you've been helpful.

 

My DIY build?

"Turn down the alky until you smell coolant, then crank it back up a notch."



Seriously though, your not really depending on the alky at this point, right? Just a side-benefit of cooling? I should have added that test was in lieu of monitoring an EGT or a/f gauge.

As far as the nozzle, why not get an M10-15 nozzle from Grainger or Mcmaster Carr? They can't be more than $5-10 and its pretty much the standard with all 'kits'.

 

My DIY build?

hahahaha, yeah, i'm trying to prevent the smell of coolant!

No, I'm not depending on it for fueling, just cooling. But I do plan on turning the boost up and I just have no idea where to start.

There is a Grainger store up the road from me so i guess I could go get one. Since it seems to be a good starting point nozzle

 

My DIY build?

You know Darin I have some nice nozzles from a cushman spray rig. Its for golfcourse chemicals, puts out a good mist? They are small.

 

My DIY build?

Really??? do they have 1/8th inch pipe thread? sounds interesting, I was just on McMaster-carr's website getting ready to buy some of those M10 and M15 nozzles

 

My DIY build?

No there drop ins for easy calibration and changing. I have some others that are 90* that mint be threaded. You would prob be better off with what your going with. But I will look tomorrow.

They work really well at high pressure though.

 

My DIY build?

That sounds like a lot. Each combo is different.

there are some good water injection pages out there, There's a calculator on this page, but it is water only.

http://www.rbracing-rsr.com/waterinjection.html

also:

http://www.waterinjection.info/phpBB2/

http://www.geocities.com/rad87gn/tech/alcohol.html

http://users.frii.com/maphill/wi.html

http://www.dawesdevices.com/howto.html

Also this:

John Estill's calcs:
Water injection: 0.40 lb/min of water will vaporize, cooling the air down from 150 F to 109 F.

Methanol:
100%: 1.08 lb/min of methanol will vaporize, cooling the air from 150 F to 96 F.
50%: 0.55 lb/min of methanol/water will vaporize, cooling the air from 150 F to 107 F

Ethanol:
100%: 1.26 lb/min of ethanol will vaporize, cooling the air from 150 F to 100 F.
50%: 0.57 lb/min of ethanol/water will vaporize, cooling the air from 150 F to 108 F

Isopropyl:
70%: 0.76 lb/min of alcohol will vaporize, cooling the air from 150 F to 107 F.
91%: 1.14 lb/min of alcohol will vaporize, cooling the air from 150 F to 104 F.
100: 1.50 lb/min of alcohol will vaporize, cooling the air from 150 F to 102 F.

 

My DIY build?

My bad, your right that was kind of a bold generalization. I asked him usage for my application through a single nozzle. Disregard that.

Good links btw

 

My DIY build?

sorry Darin, I looked and all I have are drop ins and the ones that are threaded are way to big to ever shoot a fine mist.

 

My DIY build?

no problem Sam, thanks for looking.

I got my DIY alchy/water kit done last night. I didn't get a chance to try it out so hopefully tonight I can beat on it alittle and see how it works. Like I said before I think the nozzle I have is way to small so if anyone has a few spare M15's laying around they want to unload let me know.!! otherwise i'm going to order up a few from McMaster-carr.
There is a Grainger right up the road from me but I can't seem to find the nozzles on their website to get a part number.

 

My DIY build?

Cool, I always knew that water had the biggest latent heat of vaporization and Methanol had the smallest, but methanol had high vaporization velocity rates. Cool!
-bix

 

My DIY build?

ics?:

and cost? I want to build one as well

 

My DIY build?

Check the links i posted.....

I am under $100 for mine.

 

My DIY build?

Well I drove the car to work today with my trusty temp meter ty-wrapped to the windsheild wiper. Just driving down the road the intake temp was around 118-123*, when i rolled into the gas getting up to 3psi the temps would go right up over 150*+. I set the hobbs switch to come on just over 4psi. I did a WOT run thru 3rd and some of 4th gear making just under 5psi and temps stayed below 130* so it looks like it's working.

Alchy kit:
overflow jug from Advance Auto Parts $10
Fuel pump out of newer ford minivan $free
-4 stainless braided teflon hose 36" long $24~
1/4" barb to -4 adapter $2.95
1/8" NPT steel coupler $.60
2) -4 X 1/8" NPT adapter $2.49
-4 X 1/8" NPT 90* adapter $5.49
used NOS cheater solenoid (fuel) $ ??
small spray nozzle from sprinkler store $1.74
used Hobbs switch $free i think they are around $17
1/8" NPT brass "T" $.79

so far I have under $51 in my kit. But depending on how much you have to pay for a solenoid and hobbs switch your results may vary.

I will take a pic of my set-up but you really can't see the resivour and pump.

 

My DIY build?

No need.....

do a google search for " Alcohol Injection " there are plenty online