Alcohol Injection by Mike Marra.
I designed an effective alcohol injection system for my 1986 Turbo
I in
my Horizon. It should work just as well in any ‘94-87 Turbo I.
Here is a list of things you need:
(for the above I
used the rear washer/reservoir assembly from a 4 door
l-body, and
mounted it in the stock location, even though my car was
not equipped
with a rear wiper)
-
Windshield wiper line.
-
A boost activated pressure switch (I got one from Caroll Supercharging,
but I understand
that they are available from NAPA as Hobbes switches)
-
A two way toggle switch
-
Indicator light.
-
Electrical relay.
-
A spare vacuum solenoid
-
Some type of injection jet (something with a small orifice of .010-.030)
I first went about installing the reservoir and pump. Since
I had the stock rear wiper reservoir
and pump from an Omni in my pile of L-body parts, that is where I started.
If your car is equipped with
a rear washer, you can use that. Or, you can go to any parts store,
and pick up a small reservoir and pump.
Once they are installed, it is time for the wiring.
First, find a place on your dashboard to install the toggle switch
and the indicator light.
Find a place underhood to install the relay, pressure switch and vacuum
solenoid.
Make sure the relay and the solenoid are properly grounded.
Run a wire from an ignition-on source to the switch. then run the other
lead of the switch to the pressure
switch under the hood. Then run the other lead from the pressures switch
to the “switched” side of the
relay. Run another wire from the positive side of the battery, to the
“positive” terminal on the relay
(you may want to put an inline fuse here). This will ensure that the
system cannot be operated with the
ignition off, and the pump, solenoid, and indicator light are all getting
direct power from the battery without
overloading the switches.
From the “accessory” side of the relay, run three wires. One to the
indicator light on the dash,
one to the alcohol pump, and one to the vacuum solenoid.
Make sure that when positive power is supplied to the solenoid, it
switches from closed to open,
and not the opposite. The purpose of this is to make sure that the
injection media will not siphon into the
engine after the system has stopped pumping.
Now you can start plumbing your tubing for the injection media. Run
tubing from the outlet of the
pump to the solenoid, then out from the solenoid to the injector.
For an injector I used a small brass fitting with a small hole
in it (.010 to 0.030) Jeff Chojnacki uses welding jets,
which I intend to try next. I have the injector placed in the
top of the TB, sticking through a small hole drilled into the plastic elbow
on top. The injector is snug fitted into the hole and a small blob of solder
was placed on it to keep it from falling through the hole. Be careful with
this, cause if it does fall into the holes the first thing it will hit
is your turbo compressor. Also, make sure that the injector is placed directly
over the throttle butterfly, and not in the center of the plastic elbow.
Now, you should be ready to try it out. Now, I have discovered, this
did not really add much power, to my engine until I raised the boost beyond
14 psi. In doing this, the A/F ratio was just right, and the alcohol provided
enough fuel for the extra boost. This means that bleeds are involved,
and that means you are taking the fate of your engine into your own hands.
If you are not familiar with safely using bleeds, please contact somebody
who is.
marr0841@kutztown.edu