toddk911

I would even try Ebay and just get a good used fuel pump.

All you need is volume, pressure is NOT an issue with IC sprayer.

Just get as much of the IC sprayed as possible.

Dark Lightning

Fuel pumps have a tendency to rust and/or seize up since they're not designed to handle water. Beyond that, pressure IS an issue because insufficient pressure causes a nozzle to simply drip.

You can get a ShurFlo pump for under $100. I know quite a few of us are on a budget but these are proven pumps which do exactly what we're looking for. And if/when you decide to move up to a water injection system it'll have the flow to run the IC sprayer AND the WI system.

toddk911

If it can handle gas, it can handle water. And running a fuel pump you could add alchol/antifreeze and run a cooled charge

Of course you need enough pressure to get the water to spray out of the nozzle; I thought that was obvious But you do not need any where close to the same pressure as needed on a WI system.

Although I agree if you start with the high pressure pump, it makes for easy upgrade to WI.

toddk911

But then you are almost up to cost of WI system kit. No, not an Aquamist kit, but there have been many in here discussed and reviewed that work just fine for $200 range with 2x to 3x the benifits of sprayer.

I guess if you are gonna spend that kind of money on a sprayer, might as well just do WI.

NZ951

I just bought an electromanetic ERL pump

I will do a WI system oafter I do this IC sprayer.

Dark Lightning

NZ951

I just need to add this note:

In case anyone is thinking this, DONT use the washer pump for a WATER INJECTION kit. Do a search on atomisation and you will find out why.

NZ951

PS a WI kit costs a more to install and is a LOT more complex. Its not just about pump and nozzle. Consider where your nozzle will go for WI for example! You cant tap the stock pipe its too thin. Now, think about how much water do you install? Is it linear based on load? AF? MUCH more complex...

macnewma

I have seen some guys tap the output of the IC as that is thicker. If you have custom pipes, you can always have a bung welded.

Controlling it is more complex. Some just use a boost activated switch to trigger the water to flow when a boost threshold has past. Some claim this is adequate. It is probably not optimal though.

I know of a very complete and well performing kit that sells for US$300 that is boost switch activated (they also sell the same kit with a variable controller for $400). Only about $100 of this is the controller, the rest the plumbing, pump, etc. I would just do WI myself if you have to buy a $100 pump.

Dark Lightning

A controller like what Mac is describing: http://www.snowperformance.net/prodd...p?prod=auto030

macnewma

In fact, the snow kit is exactly what I am referring to.

I think it is the best kit for the money unless you want to go crazy with port injection or very precise control via a standalone.

NZ951

Yeah thats $129, but assumes a linear relationship between boost and required water. Here are some more resources. The Snow control unit may be enough and I have been considering using it for a while as its the most developed cheap controller ie not just a pressure on off switch.

http://www.rbracing-rsr.com/waterinjection.html

http://www.aquastealth.com/index.asp...PROD&ProdID=89

http://www.coolingmist.com/categorie...n=set&res=1400

NZ951

Max the problem with in the IC and not in the pipe is that its then before the BOV... I imagine you want it after.

macnewma

Andrew, I agree that their controller isn't perfect, but short of a full standalone controlling it, nothing is perfect (and even then you need to figure out the science of a perfect mixture). I feel that although you might have slightly diminished returns from WI with this coarser tuning, it is far more economical. You probably just can't push the limit of boost as far.

I had not thought about the BOV being an issue. I am not sure if it does matter. Would the BOV ever be open when water is injected? Shouldn't it be completely atomized by then?

B951S had his in the intercooler output: https://rennlist.com/forums/showthre...ater+injection

NZ951

I would have thought there would be some water in the instant on the gear shift... but I cant tell for sure obviously, but I suspect there is a good chance there will be.

I think Davinder moved it to after the BOV as well after having it in the IC output.