Question for you guys on big water systems

VMAX

VMAX

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Aug 18, 2009
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Last night I gave my new to me water system a quarter mile pass and it seemed to put out the fire around the top of 2nd. Truck bucked and cut in and out. I verified this being the issue by turning the water off on the next pass and had no issues. I have the option of cutting down pressure or nozzle size. I think nozzle size would be wise but looking for some verification here.

System is the schieds stand alone kit running 650 psi. It is actuated with a Hobbs switch at 50psi. 6 nozzles feeding intake runners. Not sure of the nozzle size I bought the kit used from a puller. I benched tested about 3 quarts should be injected on a 10 second pass.
 
I had a setup once that sprayed about that much (just for experimentation). I couldn't keep it from going screwy unless I was at absolute full power/wot.

I think smaller nozzles would work better, that way you can keep up your pressure and atomization (right word for this?). And they're super cheap. but If you can cut pressure first to test it for free, might as well try it.
 
Could you just restrict the feed line a little?

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Dunno, are they poppet nozzles or are they just open?

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Max see what size nozzles are in it. Ive got 2 spare sets at the house ill have to check size on them tonight when i get home maybe one them will be smaller than what you have.
 
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All I have is the 21 stamped on the side of them. 21gph is my guess? I did many test hits on the street with this setup and it did fine but I was no able to air it out as long as I did at the track. Apparently it does fine but actually extinguishes the burn after a while.

Thanks Chris, might hit you up to experiment some. Or just find a good nozzle builder and get a set made for my setup.
 
How did the track time compare? On the dyno what I thought was a reasonable amount of water pulled 100hp.
 
Joesixpack said:
How did the track time compare? On the dyno what I thought was a reasonable amount of water pulled 100hp.
Click to expand...

Honestly I don't have any good Data on this yet. But once everything is dialed in I should be able to do some on off comparisons.
 
Its most likely just to much flow, dropping pressure would be the quick way to check. But ideally I think that 650+ is where you want to be.
 
I get that it is too much flow. I wanted to make sure smaller nozzle is the best route compared to dropping pressure.

Do you guys think the 21 is GPH?
 
My opinion, keeping the pressure high would be more important than the flow.
I would drop nozzle size to cut the flow back, while keeping the pressure high. (Like mentioned, keep the injection in a mist state, instead of a droplet state. Atomization.)
 
21 is the size of the orifice in this case .21 You can order them in any size you want from http://www.goodvibesracing.com/Nozzle_Jets.htm at 600 lbs you will inject the right number in cc's of water over 15 seconds the left number is the size of the orifice.
13-90
14-100
16-110
18-130
20-180
22-195
24-210
26-300
28-300
30-380
32-390
34-560
36-560
38-690
40-740
42-750
 
JerrodGlover said:
21 is the size of the orifice in this case .21 You can order them in any size you want from http://www.goodvibesracing.com/Nozzle_Jets.htm at 600 lbs you will inject the right number in cc's of water over 15 seconds the left number is the size of the orifice.
13-90
14-100
16-110
18-130
20-180
22-195
24-210
26-300
28-300
30-380
32-390
34-560
36-560
38-690
40-740
42-750
Click to expand...

Well damn we are on the small side of that scale it seems.
 
But you have 6 of them, one at each port. I think you were doing just fine, that and it was 60 degrees cooler Friday night than must summer time racing you will do.

And those are alcohol nozzles,, lot more fuel necessary in an alcohol setup, than water you need....
 
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I would 100% agree with extended power. Keep the pressure high otherwise the mist will turn to droplets. I know drag racing is a lot different than pulling but we only use about 40oz in 15 sec in our puller. 96oz in 10sec is a ton!
 
Somethinfierce said:
I would 100% agree with extended power. Keep the pressure high otherwise the mist will turn to droplets. I know drag racing is a lot different than pulling but we only use about 40oz in 15 sec in our puller. 96oz in 10sec is a ton!
Click to expand...

The engines are pretty similar in both applications
 
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