As many have learned the hard way, trying to use an MSD rpm chip with fuel
injection as a launch control doesn't work. The engine goes rich, the cylinders
go cold and the launch is junk.

The cause is that you are on 100% barrel valve opening and the pump is
putting out whatever gpm it does at that particular rpm. Check your flow
sheets for verification. Basically you are drowning the engine.

You could install a solenoid to bleed off some fuel at stage but why not use
the injection the way it was intended? That barrel valve spool acts as a
restrictor for part throttle use and doing it this way allows tailoring the
secondary circuit if your injection is so equipped.

This air operated throttle control is the answer. The butterflies only open
enough to create the rpm you set and the barrel valve stays in it's working
zone. Your foot is flat on the floor and once you release the trans brake
button or the clutch the injector slams open instantly or at a slower preset
rate. The rate adjustment feature is handy for total junk starting lines or
controlling ET.
This is a stouter version than you see on carburated cars. It can be set up to
pull or push the Hat lever without bending. It also has enough travel for fuel
injection which has a longer throw than carbs.
Notes:
This is NOT legal in some classes. Check your rules before ordering.
There is no returning it.
Can also be used on Carburators.
This is a single stage control.
It will not do a down track "stutter" or rpm control.
# 89 .... Dual Action Throttle control kit .... 279.95
Overall length open: 8.5"
Overall length closed 10.5"
Throw: 2.5" (carbs are 1.5")
Overall width with slide bar: 1-7/8"
Cylinder diameter: 1-1/8"
C02 Bottle
# 20 .... 10 oz bottle ........... 84.95
Co2 Regulator
Dual gauge adjustable 0-150 lb,
shows bottle and line pressure.
# 40 .. regulator .... $89.95
Extra Air Line
# T1410B ,,,... Co2 1/4" air line, 10 ft .... $9.95
# T1420B ,,,... Co2 1/4" air line, 20 ft .. $19.95
air operated fuel injection throttle control
All Text and images on this website are copyrighted by David Koehler 2000 and beyond
All sales are final. Items and services provided by Koehler Injection are intended for off road use only.
No responsibility whatsoever will be accepted by Koehler Injection for any damage, injury or loss resulting from their use.
Nitrous Master.
Urbana IL, USA    217 469 7663     M-F  9 - 5 CST
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Kit includes the air cylinder, air solenoid,
air fittings and 10 ft of air line.

You will also need a Co2 bottle, regulator
and bottle mount to complete the
project.

Installation-wise, this is not so bad.
You will need to move and remount your
current cable clamp to a different
position.
Tap the throttle lever to 1/4-20
Mount the bottle and solenoid in a
convenient spot.
Connect the solenoid power wire to the
trans brake or clutch pedal circuit.
That's it.
See Instructions here
Air operated throttle control
10 oz co2 bottle.
Push to connect tubing.
machine shop engine industrial balancing, fuel injection flow tesing urbana IL
Urbana IL, USA 
217 469 7663  
M-F  9 - 5 CST
Many Photos may be enlarged
by clicking on them.
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Nitrous Oxide
Fuel Injection
Bottle Bracket
Mounts 10 oz bottle to 1 1/4"  to 1 3/4" tube.
# 50 .... bottle bracket ........... 44.95