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.
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.
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 .... 259.95
Overall length open: 8.5"
Overall length closed 10.5"
Throw: 2" (carbs are 1.5")
Overall width with slide bar: 1-7/8"
Cylinder diameter: 1-1/8"
Overall length closed 10.5"
Throw: 2" (carbs are 1.5")
Overall width with slide bar: 1-7/8"
Cylinder diameter: 1-1/8"
C02 Bottles
# 20 .... 10 oz bottle ........... 84.95
Co2 Regulator
Preset @ 85 lbs.
Comes with gage and connector.
Comes with gage and connector.
# 30 .. preset 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
Urbana IL, USA 217 469 7663 M-F 9 - 5 CST
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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.
No responsibility whatsoever will be accepted by Koehler Injection for any damage, injury or loss resulting from their use.
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.
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.
