Advantages of higher PSI for Water Injection?

Haisely has one on there site for $1632

When using a pressure over 200 psi please be careful and make sure all fittings are rated for the pressure.
 
Wow thats pretty high. Hardly no one running any mix of meth or is the drive preassure a bigger concern at higher preassures?
 
Then you have to pull the head to mod it, add lines nozzles ect.....what a PITA, then if you have to pay to have it done......what 3K for a water injection system.

Jim
 
I have been told we are waisting time putting nozzles in the head. My setup has 4 nozzles 2 in the CAC and 2 in the intake plenum.
 
There was a guy on DTR that was puttint water/meth and nitrous on his 3rd gen and said he was putting a pre cac jet for nitrous and the rest in the intake horn. Seemed like an odd setup. Lots of people said it wouldnt work. I never saw the outcome of that one.
 
tristan21 said:
Wow thats pretty high. Hardly no one running any mix of meth or is the drive preassure a bigger concern at higher preassures?
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tristan:

On my 1996 Dodge CTD 12 valve, I cannot run any methanol with my water because I get bad "detonation" in the engine with the high "mechanical/fixed"
timing with the P-7100, Cummins 12 valve engine. I found that the higher my timing was, the worse the detonation was. This "detonation" sounds much like "spark ping" on a gas engine. With that being said, it does not seem to be a problem with the 24 valve or CR engines as they have the "variable timing" and I guess that helps the condition, as alot of guys are running the water/meth systems on those trucks.

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John_P
 
Begle1 said:
Anybody with a fluid dynamics background know how much PSI a 3000 PSI hydraulic pump will put out if it's pumping water?
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I would guess 3000 psi if you can get the pump to live. Probably also lubricated by the pumped fluid. A critical thing you need to look at is volume the pump can produce. Make sure it exceeds your minimum flow needs or it will likely not make the pressure you are expecting.

Jim
 
Anyone ever pressurize the water resevior to offset the pressure gain in the intake from boost? What I mean is to run a boost line to a sealed resevior which will actually increase the pressure of the water before the pump increasing the pump's output by the same amount thus keeping the same flow and atomization at the nozzle where you are injecting the water?
 
Most hydraulic pumps flow on the order of gallons per minute at 3000 PSI; they're all overkill.

If you used your turbo to pressurize a water reservoir, you would be neutering yourself in terms of spool-up... Think of all the energy and time the turbo would spend pressurizing the air in the reservoir instead of the air in the intake.
 
As long as the system is sealed there would be no flow, it would be about as detrimental to performance as a boost gauge.

But my question, does raising the pressure of the system (water) before the pump increase the total pressure in the system (ie. does the pressure after the pump rise the same amount)?
 
It isn't a question of flow, it's a question of volume.

A turbocharger has to pressurize all of the air in the intake before the engine starts seeing pressurized air. Imagine if you welded a 55 gallon barrel into your air intake system in place of an intercooler. The system wouldn't be leaking any air, but turbo response would be terrible because the turbo would have to pressurize all of the air inside of the drum.

For a boost gauge, the only volume of air that you're adding is the volume of the itty-bitty sender line.

But if you were plumbing a reservoir into your intake system, that would be quite a bit more volume, and as you used the water the volume of air would increase.

Would it increase pressure of the water throughout the system? I would think so, but that's another one of them fluid dynamics questions...
 
Ken in AZ said:
Anyone ever pressurize the water resevior to offset the pressure gain in the intake from boost? What I mean is to run a boost line to a sealed resevior which will actually increase the pressure of the water before the pump increasing the pump's output by the same amount thus keeping the same flow and atomization at the nozzle where you are injecting the water?
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yes, a lot of the home-built systems we made back in the day were plumbed like this because the pumps we were using were pretty weak. Granted, this was on cars making 15-25psi, but pressurizing the front end of the resovoir took that differential out of the equation.

it definately works! :D
 
Begle1 said:
Most hydraulic pumps flow on the order of gallons per minute at 3000 PSI; they're all overkill.

If you used your turbo to pressurize a water reservoir, you would be neutering yourself in terms of spool-up... Think of all the energy and time the turbo would spend pressurizing the air in the reservoir instead of the air in the intake.
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you'd have to have one heck of an empty resovoir for that to be an issue!!!

which could be overcome with a simple one way check valve
 
How would a check valve work?

How large of reservoirs are we talking? A 2 gallon water reservoir with 1.5 gallons in it would be fine... I'm sure a 20 gallon reservoir with 4 gallons in it would be pretty noticeable.
 
Alright. So you'd build up turbo pressure once and have the pressure stay in the reservoir, so you'd only have the bad spool up the first time.
 
you wouldn't have bad spool up with a full tank...

I doubt you'd notice an effect on spool up with an empty 5gal tank, but that's beside the point
 
It's all besides the point if you use a pump that moves 3 GPM at 3000 PSI...
 
Be careful with the ratings on those pumps. I have found that you get about a 1/3rd of the flow when using water in a hydraulic pump.
 
JerrodGlover said:
Be careful with the ratings on those pumps. I have found that you get about a 1/3rd of the flow when using water in a hydraulic pump.
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I'm still trying to find the answer to that one, 1/3rd is the first number I've seen. I even asked a couple chemistry grad students about that the other day and they had no idea...

So in your experience you get 1/3rd the flow at the same pressure? Or do you loose pressure too?
 
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