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Custom fuel injection conversoin for RX1 ideas... questions.

yeah, my floats bowls dump out, my pump is wired into my lights, so when the sled dies(killcord) its off. the I found that if I just run the pump on a switch I put in for a moment to fill the carbs, then hold it WOT and put the choke on it starts to burble and stutter and fire on 1 cylinder, and proper feathering of the throttle is required to get it to kick on... I have killed the battery LOTS of times trying to even figure out how to start it.. now I can get it done most of the time, but its a PAIN, my best luck is to let it sit for like 5-10 minutes then run the pump and start, that way all the fuel can evap out of the intake. this SUCKS as I find myself rolling a LOT with the type of riding I do. even when I fall off carving sometimes and it lays on it side it happens. it makes riding really not enjoyable as I dont want to take any risks and worry about killing it.

as far as the dual excel pumps., that sounds awsome, in my mind I want a sled that comes on HARD and fast when I ask it to, I ride lots of tight trees, normal 2 stroke only turf, and when I ask for power I need it. I dont think doing the ignition is worth it for me as getting the whole bracket and magnets done would be a pita as I dont have machining capabilities... thats the stuff that really eats into the budget for me.

I like the idea of spark control, but I think just a good running efi sled will more then make me happy, I am also working on going midmount turbo, which with my turbo and such should yeild STUPID fast throttle response along with efi.

I will have to wait to save some pennies, but am very certain I am going this route. Mulot, I really appreciate the insider knowldedge. The system seemed pretty stupid easy, I just didnt want to get in over my head. and my whole motor swap is all done this year, so I can start tuning on grass as soon as its all done and installed, thats NICE.
 

Ski-Dooin' it said:
yeah, my floats bowls dump out, my pump is wired into my lights, so when the sled dies(killcord) its off. the I found that if I just run the pump on a switch I put in for a moment to fill the carbs, then hold it WOT and put the choke on it starts to burble and stutter and fire on 1 cylinder, and proper feathering of the throttle is required to get it to kick on... I have killed the battery LOTS of times trying to even figure out how to start it.. now I can get it done most of the time, but its a PAIN, my best luck is to let it sit for like 5-10 minutes then run the pump and start, that way all the fuel can evap out of the intake. this SUCKS as I find myself rolling a LOT with the type of riding I do. even when I fall off carving sometimes and it lays on it side it happens. it makes riding really not enjoyable as I dont want to take any risks and worry about killing it.

as far as the dual excel pumps., that sounds awsome, in my mind I want a sled that comes on HARD and fast when I ask it to, I ride lots of tight trees, normal 2 stroke only turf, and when I ask for power I need it. I dont think doing the ignition is worth it for me as getting the whole bracket and magnets done would be a pita as I dont have machining capabilities... thats the stuff that really eats into the budget for me.

I like the idea of spark control, but I think just a good running efi sled will more then make me happy, I am also working on going midmount turbo, which with my turbo and such should yeild STUPID fast throttle response along with efi.

I will have to wait to save some pennies, but am very certain I am going this route. Mulot, I really appreciate the insider knowldedge. The system seemed pretty stupid easy, I just didnt want to get in over my head. and my whole motor swap is all done this year, so I can start tuning on grass as soon as its all done and installed, thats NICE.
Click to expand...


Your experience was exacte same as me when carbed on boost.
 
yeah. its fun in big open.. etc etc. I just dislike the need to change my riding style to acomodate the sled having issues, my favorite ride this year was on my 700 rev ski-doo in the spring, it had plenty of power for the conditions, and handled and did what I want when I asked. no questions asked. I miseed the power, but I LOVED just riding it and not having to ride around it.

mulot, do you have any pictures of your setup?? I would love to get a look see at how you ran your setup.
 
the throttle bodies rack have been fabricated by GForce they are billet throttle bodies.

I will try to take some pictures of this this week
 
we have been doing Standalone for years, we sell blocks that go behind your carb boots that injectors go into and I can show you how we gut the stock carbs and use them as T Bodys, with this set up all your current turbo system will work only moves the inter-cooler forward 1 inch.

you will still need to get a ecu working and tuned in, our ECUs will do just fuel should you want to go that way, but that would be a batch system
you are way better off to use the complete system, if you want to call me feel free, there is way more going on then just retarding the timing but will our setup we can give you better throttle response but even the base system is 4200.00..
 
OSP standalone is not in the same league as the sds...


Two more things on SDS you need to be aware:

Its a Batch injection firing.

Its a waste spark (two coils on 4 cylinder engines)


There is more ultimate potential on sequential injection and COP ignition but its much more expensive.
 
I think yall truely OVER estimate my goals with this sled, I really want just a good runing efi sled without finding an apex motor. I like the idea of all the cool benefits, but they just arent in the budget.

as far as the full OSP setup.. that is worth more then my sled, BUT I am interested in using the carbs as throttle bodies. and the possible injector plate type setup you spoke of. I will be giving yall a call here soon about it.

I like the idea of SDS.. simple.. thats what IM going for, a decent running efi system... not peak power, speed, etc. I just want a sled I can ride that wont die everytime I lay it to far on its side.
 
oh dear.. a fueling thought of mine has reared its ugley head again.. good old C3H8 aka propane. I have been really interested in a propane conversion for quite some time, BUT have been on the fence over it. I am going to run some numbers and if the costs look right I may head that route. I have some friends in the propane biz that do conversions on cars and trucks.. works great, runs great, and is CHEAP race gas. and propane runs upside down. but as far as tuning, there are only 2 screws to tune on the system I am looking at using.. and a common one at that. Its basically all the parts brad story uses on the propane conversions he does.

We shall see. the summer is still early.. lets see where it ends up.
 
yeah, working on that. I am mocking up a forklift tank to see how they sit. I got dimensions, and with a litte seat basically on the sled it shoulnt be to bad. it has its ups and downs, I have looked into it lots before, NOW im just actually going throught the logistics of a propane build now that I have the motor in and working in place, I had considered doing a propane swap right with the motor swap but didnt want to get in over my head, now that I have the motor in and working, im more willing to try and deal with it. In realitly, the systems are stupid simple. Just need to be able to get some parts to test and look at as far as spacing goes.

also as far as refueling goes, I will have 1 for the sled and 1 large one in the truck I can transfer fill out of, so I only stock up every couple weeks or so.
 
Be careful with propane, requires differrent valve/seat materials. Propane has no lubrication for valve seats. It's called a dry fuel for a reason. I have fuel injection kits for Apex and RX1's you can check them out on my web site. :flag:
 
If I know brads and others kits didnt work so well, I might worry, but I know WAY to many people who run it in sleds/cars/trucks/etc to worry, and my rings are the crappy 03 ones that burn oil, and my turbo seals leak a tad to, so it keeps it all nice and lubed.

as far as fuel injection, I just dont have the budget for it.. and I like race gas for less then 87 octane!! its lesss complex as far as the system goes as well... there is just less to mess with, and I just like things different.

Currently working with a fella who does turbo propane toyota trucks for offroading, so he is using the same size parts and such as me, so I have a good tuning reference. Im excited to get going on it, just working on trying to save money right now!!
 
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