Water Injection - THE FACTS!
04-22-2003, 10:53 PM
#1
1.5 BAR
Thread Starter
Join Date: Dec 2002
Posts: 1,495
Water Injection - THE FACTS!
I just FINISHED setting up the water injection kit and running it...
I have to say HOLY ----, even a half assed homemade kit makes a HUGE difference in power. My intake manifold is actually cold enough to touch even if I've been driving for an hour or two.
Not only does it seem to cool things down dramatically, but the burn is better and I've been able to advance my timing and raise the boost levels...
I haven't experienced ANY knocking at 8 psi with out intercooling, and with timing slowly advancing and using the AFC-Hack.
Water injection is a no ---- major upgrade, I'll be making a write up of how you can do your own half assed homemade kit here soon
I have to say HOLY ----, even a half assed homemade kit makes a HUGE difference in power. My intake manifold is actually cold enough to touch even if I've been driving for an hour or two.
Not only does it seem to cool things down dramatically, but the burn is better and I've been able to advance my timing and raise the boost levels...
I haven't experienced ANY knocking at 8 psi with out intercooling, and with timing slowly advancing and using the AFC-Hack.
Water injection is a no ---- major upgrade, I'll be making a write up of how you can do your own half assed homemade kit here soon
04-22-2003, 11:11 PM
#4
1.5 BAR
Thread Starter
Join Date: Dec 2002
Posts: 1,495
Re:Water Injection - THE FACTS!
I'm using a boost pressure switch (You can order tehse at napa) that has 4 preset intervals. 2, 4, 7, and 10 psi.
I used a saab intercooler as my reservoir, going ot have a box made to put around it so I can stuff it with ice. (Need to find an alumi-welder out here).
THe pump is gravity fed and directly below the intercooler, the drain plug has a hose in it that drips down into the pump, from there it goes through my trunk wall under the cabin bins (del sol) up my ash tray area and into the engine compartment where its seated right before the throttle body.
It's a misting head, .05 mm if I remember correctly.
I used a saab intercooler as my reservoir, going ot have a box made to put around it so I can stuff it with ice. (Need to find an alumi-welder out here).
THe pump is gravity fed and directly below the intercooler, the drain plug has a hose in it that drips down into the pump, from there it goes through my trunk wall under the cabin bins (del sol) up my ash tray area and into the engine compartment where its seated right before the throttle body.
It's a misting head, .05 mm if I remember correctly.
04-23-2003, 01:40 AM
#6
3.0 BAR
Join Date: Nov 2004
Posts: 5,101
Re:Water Injection - THE FACTS!
This looks nothing liek a fuel injector. its a little round tip on the end of hte hose that mists the spray out in to the charge pipe just before the throttle body. Its a very slick setup nad easy to do.
04-23-2003, 02:45 AM
#9
1.5 BAR
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Join Date: Dec 2002
Posts: 1,495
Re:Water Injection - THE FACTS!
We'll get pics up as soon as possible... I have a spare injector laying here by my computer from Aquamist that way I can show exactly how it is.
A fuel injector would work to some extent -> but the water has to become a mist or it can hydrolock. The nozzles that are used for water injection are never closed, its just a nipple with a needle pin point to spray whenever pressure is applied behind it.
Basically for water injection you have...
a 100 psi pump 12V DC (minimum)
an open/close solenoid
a boost pressure sensor
water jet (injector)
hoseing (fuel hoses)
a relay
and a reservoir
The pump is usually gravity fed (if you go cheap) so the reservoir has to be mounted above it and the hose can't be bent at all or you'll choke the fluid process. The pump builds up the pressure at 100 psi, and sends it forward into the solenoid, which is electronically controlled by the boost pressure sensor...say you set it to open at 4 psi, then the water will come through the solenoid with all that pressure behind it and hit the injector nozzle and sprays all over the intake pipe.
The relay of course is just to control the circuit
Tommorow I'll be advancing the timing slightly more, just to test the waters of ping reduction with this to its fullest... it will be nice to not have that wobble effect when you let off the gas!
A fuel injector would work to some extent -> but the water has to become a mist or it can hydrolock. The nozzles that are used for water injection are never closed, its just a nipple with a needle pin point to spray whenever pressure is applied behind it.
Basically for water injection you have...
a 100 psi pump 12V DC (minimum)
an open/close solenoid
a boost pressure sensor
water jet (injector)
hoseing (fuel hoses)
a relay
and a reservoir
The pump is usually gravity fed (if you go cheap) so the reservoir has to be mounted above it and the hose can't be bent at all or you'll choke the fluid process. The pump builds up the pressure at 100 psi, and sends it forward into the solenoid, which is electronically controlled by the boost pressure sensor...say you set it to open at 4 psi, then the water will come through the solenoid with all that pressure behind it and hit the injector nozzle and sprays all over the intake pipe.
The relay of course is just to control the circuit
Tommorow I'll be advancing the timing slightly more, just to test the waters of ping reduction with this to its fullest... it will be nice to not have that wobble effect when you let off the gas!
