removing efi from a CFI. what to use?

[Wheel House Motorsports]

My buddy has a 08 800 CFI motor which is going back into a custom tube chassis. we are doing a propane conversion on it, so want to eliminate the giant wiring harness and crap which will control nothing considering we are ditching most of the parts.

would it be possible to put an older 800 carbed wiring system it it from say an edge or something? we just need a stator/pickup/cdi/harness to make it work, dont need all the extra wiring, we dont run lights, and we put in aftermarket grip wiring and such so want as little wiring to be in it as possible.

any ideas, please feel free to bounce em around.

 

[LoudHandle]

My buddy has a 08 800 CFI motor which is going back into a custom tube chassis. we are doing a propane conversion on it, so want to eliminate the giant wiring harness and crap which will control nothing considering we are ditching most of the parts.

would it be possible to put an older 800 carbed wiring system it it from say an edge or something? we just need a stator/pickup/cdi/harness to make it work, dont need all the extra wiring, we dont run lights, and we put in aftermarket grip wiring and such so want as little wiring to be in it as possible.

any ideas, please feel free to bounce em around.

That is essentially what they do for the race sleds. The cases and all are CFI Based so the stator / flywheel and all would be a bolt in. Minimal Engine electrical harness. May need a re-flash of the CDI (but with running BBQ gas you probably need that anyway) that is how they do the 600 race / 800 mono-conversion I believe. I'm sure there are others with more complete knowledge but I see it as very doable with currently available parts. No need to go completely old school for this.

 

[diamonddave]

Interesting.....What do you use to inject the propane and where on the motor? Is a TPS or any other sensor needed to help meter the proper amount of propane into the motor?

Will the old BB 800 stator fit in place of the CFI 800 stator? Is that what you were thinking?

I won't be able to get this out of head the rest of the day.

Sounds cool...

 

[Wheel House Motorsports]

the propane is its own carb type system.. requires only a 12v power signal to open the lockoff valve when it starts.. thats it. stupid simple. i just need a ignition system to do spark, and it could even be solely RPM based. we have LOTS of octane to spare so the timing can be dumb aggresive as well.

 

[TurboM700]

I hope its going be to be a turbo sled or that thing will be a dog. NA 2-stroke on propane arent exactly a good thing.

 

[Wheel House Motorsports]

what is a non turbo sled?

 

[RPS]

I built two 800 carb motors a couple years ago and yes you need to use the 600R ignition parts to make it work (seamlessly). The big block plate and flywheel are very different and I wouldn’t recommend it unless you’re up for a challenge. Unless they changed the cases some since then you will need to machine the case in a couple of areas but anyone with a Bridgeport can pull this off for you and I might even have the prints of the case still if you’re interested? As far as the map if you want to send the cdi to me I can flash the 800 SB map in it to get you a little closer then you are now. Hope this helps. RPS
(Motors were killer when they were done!)

 

[4Z]

At -40*F propane won't flow worth a darn unless the bottle is heated. You are not in Fairbanks are you? hehe