Water Injection Idea

[rsunahar]

Although I have a water injection kit coming in the mail soon, I've come up with an idea for a simple water injection system that's boost dependent.

All you'd need to find is a cheap adjustable fuel pressure regulator.

Most water injection systems rely on high pressure to compensate for boost pressure, as well as to get good atomization.
However, some people have reported bogging under water turn on.

What I think would be effective would be to run a fuel pressure regulator with a return line and have that hooked up to a boost reference.

This would raise line pressure as boost increases.

Then to tune, one would just need to change injector nozzles.


This seems sort of simple but what do you guys think?

 

[blue1]

Rsunahar what you have said could work but what psi pump were you thinking of?
Ok my stupid idea! i have run staged injection for a while now with a standalone ECU. Some one has said on this forum to piss that off and go for bigger injectors, so i did i bought 1600cc bosch from injector clinic which leaves my staged injec' capabilites open.
If i run a fuel injector (190cc) before the intercooler off my staged circuit which is fully controlable and a separate pump for water/meth what do you think that would be like? best of both worlds! or would the water/meth stuff the injector?
Input Required!

4G64/1G head
272 cams
Cyclone mani' fully operational, 65mm trottle body "moded plenum"for RWD
wiseco's
crowers springs & tit' ret's
1G big rods (shotpeened, ARP's, full floater's,Narrowed for 2G crank)
Fuel system (BIG)
Rising rate FPR
Head' ported with use of Sunnen flowbench! (mild)
Big FMIC 3" in and out Plumbing.
At the moment Td05H 17c (but open to suggestions) please!

Now lets watch this thread GROW!

 

[rsunahar]

Rsunahar what you have said could work but what psi pump were you thinking of?
Ok my stupid idea! i have run staged injection for a while now with a standalone ECU. Some one has said on this forum to piss that off and go for bigger injectors, so i did i bought 1600cc bosch from injector clinic which leaves my staged injec' capabilites open.
If i run a fuel injector (190cc) before the intercooler off my staged circuit which is fully controlable and a separate pump for water/meth what do you think that would be like? best of both worlds! or would the water/meth stuff the injector?
Input Required!

4G64/1G head
272 cams
Cyclone mani' fully operational, 65mm trottle body "moded plenum"for RWD
wiseco's
crowers springs & tit' ret's
1G big rods (shotpeened, ARP's, full floater's,Narrowed for 2G crank)
Full system (BIG)
Rising rate FPR
Head' ported with use of Sunnen flowbench! (mild)


Big FMIC 3" in and out Plumbing.
At the moment Td05H 17c (but open to suggestions) please!

Now lets watch this thread GROW!

That sounds pretty much like an aquamist mapped system, which wouldn't be cheap.

I was just thinking of a cheap way to get a sort of "mapped" system so that the WI could be turned on early without bogging.

 

[Joesmoke]

The best ways to get around bogging at turn on point is:

1. Get a variable controller (www.alkycontrol.com as example)
2. Use a staged system. Small jet on low boost, larger at higher boost. Multiple switches and solenoids.

Those are standard ways. New ways could be found, but for me, why re-invent the wheel?

Cheap and good rarely go hand in hand. Those 2 ways above are going to be less expensive then a mapped system, and commonly used. Shaving more money off would likely result in a less then ideal performing system.

rsunahar, I am a little confused on your idea. Were you thinking that boost pressure would drive the water? Regardless, you want a minimum of 60 psi for good atomization.

blue1, Im a little confused on your post as well. If im reading it right, you're using 4 1600cc injectors and you want to run injection? Way too much fueling if Im reading it right.

Less fuel, more meth/water is key. Adjust boost,timing,fuel and water/alky until the car is happy.

Straight water will corrode a fuel injector. Same with meth. Stick with inexpensive, brass atomizing jets and you'll do fine.
Also, it is generally excepted that injecting pre-intercooler is not the best place. Stick to within 6" or so of the TB.

 

[Joesmoke]

Blue1, I just found one of your posts describing your fueling system. Thats pretty impressive and beyond my scope of experience. Sorry for over simplifying my statement that you are running too much fuel. Carry on!

 

[blue1]

Joesmoke, all i am trying to do is just cool the charge air with the water/meth and since i can control an extra injector/s with the staged capabilities i thought it might be a good idea!. i will be back on the dyno early FEB just to much happening around here at the moment with normal life will keep you's posted its an easy trial thing for me.