Dudemaaanownsanrx7 your design looks pretty simple but what sort of protection does it offer if you run out of water, or have a malfunction ( like a hose comes off )? Also I have sequential turbos ( BNR). How would you adapt your system to the twins?

 

I don't have any specific protection built in. A low level sensor could easily be added. I check mine regularly so this isn't a big deal for me.

There is really no way to know if a hose comes off, but the system can be pressure tested to make sure it can handle more pressure then you run. It's relatively low pressure so it's not any more likely then having a vacuum line come loose from the UIM. Just make sure you clamp them down good or use the push in quick fittings that are used for air brakes and such.

Another method that would work on the air side is connect the pressure switch on the airline going to the tank or have another line come from the tank to the switch. Then install an LED inline with the switch so you know when the switch is activating.

Then it only comes down to the water line and solenoid. If the system is built right none of this should be an issue though.

I also have considered moving my boost gauge to water tank to monitor the pressure going in. I rarely use the gauge since my profec B displays boost, this would let me know if anything changes in the system and also give me an idea of how much boost the turbo is making vs the manifold pressure.

My tune is also on the conservative side and the AFR's wont change if the water stops. This gives me a safety net so the engine won't instantly blow from no water.

 

I have a different setup but I made it work with twins by using a dual-intake kn filter installed in a M2 airbox. I drilled a small hole at the center of the filter's top cap and installed the nozzle there. The water spray gets shared between the turbos.

 

Yeah either one nozzle in a box between both intakes. Or two nozzles being sure that the second is activated when the second turbo comes online if sequential.

 

yep now i know who you are, thanks for all the help in gettin my car started too, , what split timing do you run?

 

I had a little question on the subject of changing a turbos efficiency range. I'm buying an S14 and the car makes 278whp on the T28, and is common fact that this turbo just kisses the 300hp range. If i got this clear would the pre turbo AI will make the T28 a little more efficient? (like the 35r you were talking about) how much water would be require for that task??

 

Yes it will. I did a back to back dyno and picked up 20awd hp on a EVO using the stock turbo. It was around 250cc pre turbo only, car was making 400+ hp though @ 25psi( can't recall exactly off hand..)

 

You could also use a Peter Farrel airbox to spray preturbo on twins. It would work nicely because of the metal endplate.
Barry

 

That looks good.

 

Since reading this thread I've converted my WI setup to pre-compressor, and its MUCH better. Im running a huge K+N with a flat end plate, so was easy to install jet there.

Feels more powerful and free revving and ignition problems have been elimintated.

Now to add another 0.5bar boost.

 

evos run maf sensors right??.. Sr20s too, i'm kind of scare of water near the maf, but i guess it all depends on how you place the nozzle.

by the way, was the 20awhp at the same boost level?? if so; did you tried turning up the boost figuring out where the turbo will stop making power?

 

StavFC what size jet are you running and what boost are you currently running.

 

Incredible job bro! Sorry I didn't see this thread sooner....Major accomplishment!

 

0.7mm Aquamist jet and only 1.05-1.1 bar at the moment. Soon to be more boost and probably more water too.
Got a big Escort Cosworth WRC water inj pump (3 gallon per min IIRC) if the little Aquamist pump runs out of flow before.

 

Get the water up it. Dont be scared.

Thats ErnieT. I honestly did not think it would get this far. I want to do another setup that is similar to see if i can do it twice. The other setup will have slight improvements. See how it goes.

 

Be interesting to see how much water I can go for, the 0.7mm jet was just a best guess as I had it lying around. Im going to flow test it in the next few days, at mo going purely by what Aquamist say that setup flows.

Here's a few pics of my setup, need to tidy it up now I know it works...

 

thats a neat filter.

 

.7mm is around 200-250cc.

You want around 500cc at least.

 

i got a meth jet in a intake pipe i got. how do i find out how many CC's it is?

 

Put a measureing cup under it and see how much it fills in one minute.

 

at exactly 100 psi, to compare it against other standard M#'s

 

with zero pressure running to it? just screw it into a milk jug cap and tip the jug upside down and let it run out into a cup

 

That wouldn't work. You have to have the system hooked up and working with the pump u plan on using. Pressure effects flow. There's is a chart that shows the flow rates of several different sized nozzles at like 100 and 250 psi. It's just as well to test your own system though just so you know for sure what it flows.

 

If you cant run the test, take a pic of the nozzle opening and post it here, I could give you a rough estimate of what size it would be.

 

Damn, now you say that and looking at what you've found best, you're dead right

I'll flow check it ASAP and upgrade. I think the Aquamist pump is all out of flow at about 500cc so I might be upgrading the pump afterall!

Thanks for the info, well, for this whole thread, seems youve opened a lot of eyes