Another Water injection thread.

[RipperXX]

Im looking at Engine Runups "150 PSI Pressure Switch Stage 1 Kit" And I am wondering if this is the best kit for me.

More so I am wondering if the H4 nozzle is enough? I plan on running 16psi daily, and then once I get a EBC, at the press of a butten high boost. Most likely like 24psi. I would want the water injection to kick on at like 18psi.

I have 750cc injectors FMIC and E3 turbo. going to toss in some HKS 264/264 cams soon. Looking to try to get 380whp.

 

[Talonguy5]

Any basic pump/single nozzle/pressure switch kit will work well for you.

Get at least a 7gph nozzle, and have it turn on ~12psi.

Do that, and you'll never run under 24psi again.

(I have the set-up you've listed, and the above has worked VERY well for me.)

 

[RipperXX]

12psi isn't that kind of early? You dont have any hesitation problems?

 

[MrBoxx]

You want the system to come online at about half the max psi you want to run. So if you want to run 24psi of boost, then you will probably want to start injecting at around 12psi.

 

[Mike1992]

Mine's set to come on around 10 psi and I run upwards of 20 psi on a daily basis, no bogging or hesitation. I run both a m4/m5 nozzle on that same kit your looking at. Estimate how much fuel your burning and try to shoot for 10-25% of that when injecting.

 

[Enraged78]

Im looking at Engine Runups "150 PSI Pressure Switch Stage 1 Kit" And I am wondering if this is the best kit for me.

More so I am wondering if the H4 nozzle is enough? I plan on running 16psi daily, and then once I get a EBC, at the press of a butten high boost. Most likely like 24psi. I would want the water injection to kick on at like 18psi.

I have 750cc injectors FMIC and E3 turbo. going to toss in some HKS 264/264 cams soon. Looking to try to get 380whp.

I run this exact same kit with the dual output nozzles. Use the calculator the he has set up on his site. It seems to be pretty accurate. I wound up going with an M2 nozzle pre-intercooler (stock sidemount) and and M3 nozzle just after the blow off valve. My injectors kick on at 8PSI, and I run a 50/50 mixture of water and meth. I run 780cc injectors, and also an EVO III

Needless to say, the car absolutely loves it. Before the kit, 16PSI with full timing was OK until I heat soaked the intercooler. This doesn't take very long. After the kit, I can now run 20PSI in the dead of summer all day with full timing and no knock. I have pushed the car with a couple of high speed 100% throttle runs with no knock at all. When the temperature outside is below 50 Degrees, I can squeeze 22PSI out of it, again with no knock. DSMLink recorded 315WHP with the 22PSI setup. You should have no problem getting close to your 380WHP goal with your front mount and some cams.

Get it, enjoy it. It's a great kit, and the customer service was great.

Matt.

 

[MrBoxx]

You're really not supposed to run any injection before the intercooler due to the condensation of the water when the air charge cools. I could be wrong about that. I remember reading it somewhere on one of the injection company's sites, but I can't remember where.

 

[Enraged78]

You're really not supposed to run any injection before the intercooler due to the condensation of the water when the air charge cools. I could be wrong about that. I remember reading it somewhere on one of the injection company's sites, but I can't remember where.

There are a few sites where I have heard the same thing. The main concern is that the mixture oxidizes the aluminum, causing it corrode. I've pulled my upper and lower pipes quite a few times and have seen no corrosion of any kind. In the long run, if it happens to cause enough corrosion to cause the intercooler to leak, it just gives me an excuse to upgrade to a front mount. In the meantime, injecting before the intercooler eliminated any heat soak I was getting, so I think it's worth it. Everyone has their own view on this, however.

Thanks,
Matt.