Anyone ever try water injection??

A friend of mine recently posed this question to me, and after a little research it sounds like a feasible approach to a high compression ratio and lack of high octane fuel (91 in my area).

I'll post links to sites I've found and researched later tonight.

Thanks in advance.

 

water injection...

i used to use it on my 84 turbo mustang....of course I was pushing 26 lbs. of boost :laugh: and went through 3 motors o No: ......but it really did help stop the detonation. Man did that thing fly !!!


Mark

 

Now that I have a turbo motor I have foung a lot of information on water alcohol injection. The turbo guys love it. try this linke http://turbobuick.com/forums/forumdisplay.php?f=14

 

A technique used on some WW II aircraft engines.

 

I used it on a jet boat with a 427 L-88 12.5 to 1 it worked great.You could hear the difference in the motor. Would like to try it again.But i have not seen it.

 

My one grandfather flew in a B-24 during WWII. He told me they had turbo chargers, and would water-inject them to keep detonation at bay.

 

Never used water but have used steam injection but not for detonation, for gas milage. Don't know if it would work for detonation or not?

Dave B

 

Links I've found.

This is the one I'm contemplating on...

What I will probably end up doing. :Brow:

Another do-it-yourselfer

Explanation.

I don't have a turbo, and can't afford one in the very near future.

Has anybody heard of someone trying it on a naturally aspirated vehicle?

There are kits available, so I guess it can be done. I'm just wondering if it's worth it.

Thanks for all the replies so far... :TU:

 

I think Smokey Yunick tried it, and I can remember "Kits" from JC Whitney in the 60.
Oldsmobile used to include a bottle of "Rocket Fuel" (Alcohol I think) with the 215 Turbo 215.
Found a Base plate at the Local Speed Shop a while ago (they still have it under the counter) that has the connections to hook it to the windshield washer pump, and use the washer tank for a resovior.
JR

 

I used Edelbrock's VaraJection (no longer available) with great results on my 436 in the '80's. You can find the kits on ebay on a regular basis.

The Edelbrock Varajection system used 2 inputs, RPM (from the distributor) and manifold pressure (internal sensor). It uses a standard OEM type windshield washer tank with built in pump, and a couple of different nozzles that you can install in the top of the aircleaner. It has a small check valve in the water hose to prevent water from draining back to the tank. It has 3 pots for setting it up:

RPM threshold - keeps water off until RPM setting is exceeded. This keeps water injection off at lower RPM's.
MAP threshold - keeps water off until manifold pressure drops below setpoint. This keeps water off at part throttle + cruise.
Volume - this controls the maximum pump speed, and thus the max volume of water injected.

I used to add methanol to the water for the helluvit.

Devon

 

The Edelbrock Varajection was the best of the "old" water injection systems.Spearco was another fairly good setup.I used them both on small block Chevies,and on the BB Buick.I never looked at them (re normally aspirated motors) as giving you any power,just restoring most of what you should have had to begin with if there weren't a compression problem,bad cam choice ,hot spots or whatever.
The new systems are even more sophisticated and apparently are used by a lot of the turboed and supercharged crowd with great success.
Rod

 

Great Info!

Excellent information Devon and Rod!

I was curious what the three dials were on that Varijection unit. I saw two different ones go on Ebay for $75 and $125.

Hopefully I can make something that will be just as good.