fo0manchu wrote:fuel pumps will rust or corrode. Perhaps that marvel mystery oil trick might help?? I'm not sure how the seals in the pump will hold up as well.
Not even MM will save a stock in-tank pump once it's submerged in water...lol. You'd be way better using two washer pumps or inline-fuel pump. If you use a pump ment for fuel you'll have to be very cautious with keeping an eye on flow etc. If the internals start to corrode it will simply slow down before it quits. This would obviously be a bad thing. Any loss in pressure will lead to the water spray becoming far less atomized when it leaves the nozzle not to mention you're spraying far less water as a whole.
In short, not worth the risk at all IMHO. Save for 2 months and buy a Shurflo pump that will work for years and flow enough to support 500whp.
I wouldn't even use a single washer pump, dual pump setup or nothing. Then you run into the problem, what if one of the pumps fail. The second won't be enough if you've properly tuned the system. Then again, I'd be using the water injection if a dual nozzle setup. That way I can use 2 smaller nozzles and increase the amount of boost.
For a low boost kit that uses a smaller nozzle, the higher flow washer pump would probably work fine for someone on a tight budget. The water would let you run an easy 10 psi with no timing retard at all. So you'll make quite a bit more power then say 8 psi and a slight retard in your base timing. Probably 40 horse power, which is pretty good considering the $$$ per HP ratio