Water Injection Video

[DSM97GST]

we tested the water injectin kit that we got and it seems like it is spraying a lot of water....I thought it was supposed to be a fine mist. the pump is 100psi and nozzle is the M3. When it pumps, it pulses. check the video, its pretty self explanatory....is that normal???

http://www.youtube.com/watch?v=nTARML7ROGE

 

[perley03]

Linky no worky

 

[blackrosenova40]

If you calculate how much air your engine is drawing, say at 3000 rpm, that amount of water will look like nothing compared to how much air your engine is drawing.

 

[donmagicjuan]

The water spray looks ok, but the pulsing is a bit strange. Is the pump being supplied with a constant voltage source? Also, what kind of kit is it?

 

[DSM97GST]

i was thinking the same thing...is it normal for it to pulsate though?

 

[DSM97GST]

The water spray looks ok, but the pulsing is a bit strange. Is the pump being supplied with a constant voltage source? Also, what kind of kit is it?

just hooked up the power and ground straight to the battery. its a coolingmist kit.

 

[blackrosenova40]

At 3000 rpm, your engine draws about 13.2 gallons of air per second.

 

[donmagicjuan]

I have a Devil's Own kit, so I can't say whether it's normal for that one, but I know mine doesn't pulse. Are you sure there are no kinks in the system? If it were mine, I would feel more comfortable with a constant flowrate. Perhaps someone with the same kit can offer their observations.

 

[DSM97GST]

I have a Devil's Own kit, so I can't say whether it's normal for that one, but I know mine doesn't pulse. Are you sure there are no kinks in the system? If it were mine, I would feel more comfortable with a constant flowrate. Perhaps someone with the same kit can offer their observations.

My buddy that was with me has a Devils Own, so we are going to connect his tomorrow and see what it does. I am just tripping because the kit is brand new.

 

[DSM97GST]

Has anyone ever experienced a pulsating pump like that. It tripped me out, I mean the pump is new. Im gonna call Coolingmist tomorrow.

 

[Defiant]

Other than the drip, that looks fine.

 

[Anonymity]

Other than the drip, that looks fine.

thats what id be worring about

 

[HustlerTalon]

I have a coolingmist kit also and it pulsates like that also. I always thought it was normal so I never paid any attention to it. But that is how mine sprays the only difference is that I have the 150psi pump. Fix that leak!

 

[VanIsleDSM]

maybe some more expensive pumps are different and pump smooth outa the box, you my friend need an accumulator, that kit should have come with one, I wouldn't be down with that pulsing at all...

http://www.shurflo.com/pages/Marine/marine_categories/water_sys_acc/accumulator.html

something like that.

 

[EngineRunup]

The pulsing is completely normal. All Shurflo pumps come with a pressure switch on them, which regulates how much pressure the pump outputs. The cycle is about 15 psi. So if you have a 100 psi pump, it rapidly cycles between 85-100 psi. This is completly normal. The larger the injector used, the quicker the pressure will drop from 100 to 85 psi, so the faster the pump will pulse. The reason Devil's Own doesn't cycle is that they have removed the pressure switch, so the pump outputs its maximum possible pressure, all the time. This might sound great, but the pump is not designed for these pressures, and will lead to early failure. This comes straight from Shurflo, as we inquired about selling our pumps like that. We were told if we wanted our pumps to keep working, don't do it.

Thanks,

Greg
Engine Runup

 

[VanIsleDSM]

the best way to do it is to use an accumulator, I'd feel more confident knowing that it was a steady stream, not to mention the fact that it's way easier on the pump and will make it last a lot longer.

 

[donmagicjuan]

The pulsing is completely normal. All Shurflo pumps come with a pressure switch on them, which regulates how much pressure the pump outputs. The cycle is about 15 psi. So if you have a 100 psi pump, it rapidly cycles between 85-100 psi. This is completly normal. The larger the injector used, the quicker the pressure will drop from 100 to 85 psi, so the faster the pump will pulse. The reason Devil's Own doesn't cycle is that they have removed the pressure switch, so the pump outputs its maximum possible pressure, all the time. This might sound great, but the pump is not designed for these pressures, and will lead to early failure. This comes straight from Shurflo, as we inquired about selling our pumps like that. We were told if we wanted our pumps to keep working, don't do it.

Thanks,

Greg
Engine Runup

Greg,

I found your post a little unsettling, so I called Chance at Devil's Own today to get the real story. I'm afraid what you're saying is untrue. Devil's Own does not modify their pumps by removing the pressure switch. They simply dial the hex adjuster down to the lowest setting, which results in the highest pressure output within the design limitations of the pump. I doubt that this adjustment would adversely affect the longevity of the pump, since it's an incorporated feature, but I've not done any long term testing to confirm this. Furthermore, I understand that the pump has a pressure relief valve that will recirculate the output back to the pump inlet if pressure reaches unsafe levels. I will forward this thread to Chance so that he can post his experiences, which I'm sure are a good bit more extensive than my own.

I hope that clears things up a bit.

 

[Devilsown]

Hello,


All alcohol injection pumps can pulse, ours, or coolingmist and Snow. Us 3 are the only 3 companys that i know of that buy CUSTOM pumps thur shurflo. EngineRunup has an agreament with coolingmist pumps and other product lines. So its going to test the same as an coolingmists pump.

Our design is a tad differnt than Coolingmist. And will have differnt results. We believe ours works better. What do you think donmagicjuan?

But straight from the horses mouth. Our pumps DO have a pressure switch. And we would never do anything to the pumps to risk loosing our account with shurflo. It would put us out of business if we could not sell pumps with our alky kits

Yes, there is a check valve built into the pumps. So if you dead head a pump you will not see 300 psi for example.

 

[EngineRunup]

My mistake about the pressure switch. But what happens when you screw the little hex screw all the way in, is basically turn the pressure switch into an on switch. Meaning, the pump will not turn off when it reaches a set pressure, it will just pump at its maximum possible output until power is removed (via a controller or boost pressure switch). My information, that this will lead to premature failure, comes directly from Shurflo, the manufacturer. If it works, great, but if it fails, then it's not so great.

This debate has happened many times on many forums, so I will not respond to anymore posts regarding this topic. If anyone wants to argue otherwise, simply contact a Shurlfo representative and ask their opinion.

Thanks,

Greg

 

[Devilsown]

No problem Greg, I just am clearing things up. I have looked into things to far myself sometimes. But I ask you to have a look at the adjuster on the pumps you sell. I bet the hex is turned all the way down from coolingmist. I can't say how they show up to coolingmist but we don't touch ours. This is how they show up to us from shuflo.

I am not trying to debate you. Just want to point out that your have the hex turned down to.
Like i said before our pump is a tad differnt than coolingmist.

 

[EngineRunup]

Nope, ours are definitely not screwed all the way down, they are roughly in the middle, maybe a little more, but no where near all the way.

Greg

 

[donmagicjuan]

Chance, I've had nothing but positive results with your kit, and it proved to be a big help in reaching my goals for the car. However, I don't have any experience with other kits to be able to say with certainty that it can outperform the others. I do know that you stand by your products, and I will continue to recommend them to other members.

Like I said, I don't think the adjustment screw would have any bearing on the pump's life expectancy, but since there seems to be two schools of thought, I'd be interested in hearing what the manufacturer has to say on the subject. I will attempt to contact Shurflo to speak with a representative, and I'll be sure to post the feedback I get from them.

Thank you Greg and Chance for your input.

 

[Devilsown]

Sorry i ment DSM97GST. he has the buddy with our kit and he has coolingmist so he should have no problem comparing.

Your welcome, if you have any questions let me know. Don't like posting here because I don't sponser this forum. I don't want to step on toes, Just wanted to clear things up.

 

[91etalon]

Sorry i ment DSM97GST. he has the buddy with our kit and he has coolingmist so he should have no problem comparing.

Your welcome, if you have any questions let me know. Don't like posting here because I don't sponser this forum. I don't want to step on toes, Just wanted to clear things up.

hi, im the friend he was referring to. We tested my devilsown kit and it doesnt pulse at all. I have yet to really put the kit to the test since my turbo isnt in the car at the moment but so far the kit looks promising. . From what im reading in the difference in shuflo pumps, it seems as thought pulsating is normal for aquamist and enginerunup.

 

[donmagicjuan]

Chance,

I respect your stance on posting in the forums as a non-sponsoring vendor, but in this case I invited you into the discussion to ensure the information here was accurate. Don't feel bad.