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Discussion Starter #1
Does anyone make an aftermarket fuel injection system for sleds?
If not somebody should so we can get rid of the 1920's tech in carbs!
 

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Doesn't Polaris make a Performance sled with fuel injection?
Or were you thinking of something else?

Early 90's, a company called Independent Research Specialtys (IRS)
had some programmable fuel injection units available (limited supply)for the AC Wildcats and El Tigres.
required a lap-top computer to tune. Kind of primative, compared to todays Boondocker Boxes, etc.
 

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If you already have a carb sled, buy a tempaflow. Its not injected, but as close as you can get with a carb. Once you get it set up your jetting will be perfect all the time, every time. If you do a lot of elevation change, then go with the variflow (compensates for both temp and elevation). Best money you can spend on a carburated sled (IMO, tied with clutching)
 

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There is a company in Oswego, IL called Hahn Race Craft, he will custom one out for you, but it's not cheap... I had him do one for my drag bike, and it was almost $3000...
 

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Originally posted by cat-sass
[br]Doesn't Polaris make a Performance sled with fuel injection?
Or were you thinking of something else?

Early 90's, a company called Independent Research Specialtys (IRS)
had some programmable fuel injection units available (limited supply)for the AC Wildcats and El Tigres.
required a lap-top computer to tune. Kind of primative, compared to todays Boondocker Boxes, etc.
I believe your thinking of Imjection Research Specialists, they owned all the patents on the early EFI for two-strokes sled motors.
 

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Discussion Starter #6
My sled is an 06 600 Fuse, I have already installed a tempa-flow. I just hate carbs they are never tuned to the conditions (nature of the beast).
 

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Originally posted by anzak
[br]My sled is an 06 600 Fuse, I have already installed a tempa-flow. I just hate carbs they are never tuned to the conditions (nature of the beast).
You have to look at the weather reports and the elevation that you will be riding at.
I would normally do this the day before each ride on the mod sled.
I've normally found though that most people running a single pipe could run a basic set up for most temps in the areas that they ride in and not notice much difference.
If you look at your jetting charts, they are in 3,000 foot increments and that really is a ton of elevation change for a single ride day.

As to aftermarket EFI,
Not that I'm aware of. At least not something that I would want to foot the bill for.
I can buy a ton of jets for that 3K mentioned above.
 

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Originally posted by anzak
[br]My sled is an 06 600 Fuse, I have already installed a tempa-flow. I just hate carbs they are never tuned to the conditions (nature of the beast).
put down the x box controller and learn how to jet a carb then.
 

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^^^hahaha. There is much more benefit to fuel injection then just compensating for altitude changes... like better gas mileage, a more consistent running motor, and I know I am totally gonna get flamed for saying this from the carb lovers, but if setup correctly, you can get much better throttle response as well. plus, the ability to do data logging and know exactly what your motor is doing. 3k may seem like a lot (trust me, my checkbook agrees with you), but when you are racing every weekend, and your winning or losing is dependent on consistency, then it becomes worth it.
 

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The 06 fusion is very rich from the factory, down jet 1 size on the main, and even 1 on the pilot. what those sleds really crave is more air, check into slp and see if they offer and big horn air intake for it. as well the clucth weights are too heavy for that sled, goto a 10-60 polaris weight with an almond red spring, u will love your sled.
 

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Also check to see if the oil pump is is setup correctly, can't always trust the guys working on the assembly line. your dealer should have set it upon pdi, but u never know until u check.
 

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Why do the manufacturer's stick with carbs instead of going to injection? Seems like there has been a few models over the years (I have a 92 Polaris EFI) but none stuck... seems like there is many advantages... is it just cost to them or is there a big advantage to having carbs for most people who just want to ride and not tinker with jets?
 

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I dont think there is a perfect solution to the carb or efi. I think it was just a economic thing early in the debate between the two. But with better CPU/brain boxs it allows for tuning for temp, elevation, throttle position, gas on and on. So as time has went on the scales are tipping to the Injection. Look 10 years ago how many sleds were FI vs carb Its the way things are going to go.
 

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As to krappana, I would have to say the reason manufacturers are sticking with carbs over EFI would be the cost to produce, and the fact that you can work on carbs and don't need a computer to figure out why your machine is not running correctly, like EFI.
 
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