michaeladams
New member
whats your take on them?maybe it's like everything,some good points and some bad.which is more likely to burn down?
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efi or carbs on a 2 stroke
- Thread starter michaeladams
- Start date
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Are you talking new or used? Are there even any new carbed sleds to buy? Carbs are getting to be a dinosaur. EFI = no choke, no elevation corrections, no temp corrections. Don't know of any good reasons to buy carb sled. What are you looking at????
harvest1121
Well-known member
Arctic Cat does have fuel injection but the mpg is awful. I will take my 800 Skidoo that has carbs and gets 15-18 mpg.
and then 12mpg 700 efi cat walks right buy A carb 800doo. who buys a 800 and is concerned with mpg come on. you spend 10g or better for a toy you will prob sell with less than 5000 mi on it for a 7k or more loss and you are worried about MPG.so in 5000 mi the cat used aprox 166 more gal so aprox$233 more in gas. no carb cleaning/ faster throttle response/ if you are a tuner way more fine tuneable/if you run nos way better system than vacuum pressure float bowl {is what I have to run on my 1010 zr900carb with nos]and it is verry hard to tune and keep tuned.cat efi uses gas but verry reliable and always fast out of the box and verry fast with right setup
harvest1121
Well-known member
Going by experience I had a 2005 F7 that was a slow 700. It was relaible but just could not get comfortable. The 2002 Ac 600 was a better trail sled for me. I rather have a snowmobile with range and not have to worry about getting gas all the time. I was doing your math on cost so 166 gallons cost is $233 where do you buy gas for $1.40 I want some of that.
cuzzinolaf
Well-known member
Arctic Cat does have fuel injection but the mpg is awful. I will take my 800 Skidoo that has carbs and gets 15-18 mpg.
Funny! When we went out west two years ago we got pretty deep and ended up with over 115 miles of trail/off-trail riding. EVERY sled except the M7 and M8 needed gas on the way back.
I believe there was a 4-stroke Yamaha, a Polaris 600 and a Ski-Doo 800 and the M7 and M8.
whats your take on them?maybe it's like everything,some good points and some bad.which is more likely to burn down?
If you like 2s carbs you better buy 1 now. 800etek coming & Poo busting butt to have injected 2s 800 2011 model = to etek. AC won't be able to continue to produce carbed 2s or TB efi as they do not meet EPA requirements. AC way behind with 2s injected & will have to go 4s like Yam. 2s carbs will be gone 600cc & up 2011. Not sure what happens with non current 2s in boxes? Probably ok on past emissions credits. Carbs are moot in future game over.
Going by experience I had a 2005 F7 that was a slow 700. It was reliable but just could not get comfortable. The 2002 Ac 600 was a better trail sled for me. I rather have a snowmobile with range and not have to worry about getting gas all the time. I was doing your math on cost so 166 gallons cost is $233 where do you buy gas for $1.40 I want some of that.
my bad 0k maby 450 still what ever I spend that in race gas and NOS in 1 season you don't buy a big boy toy for MPG.your 05 was prob dd I still cant get dd to go fast not a big fan of dd for racing but don't mind in my xfire but would rather have a Chane case until swapping tracks then I love the dd
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Have to go with EFI. We have two 2001-era Seadoo PWC's. They are 787cc's with EFI. Press the button and they start - press it again and they stop. I have never fouled a plug and the oil use is very low. No problems with fuel, burndowns, etc. Very turn-key.
We also have two Polaris 600's with carbs, 2000 and 2005. While they are reliable, they both go through at least one set of plugs each year. They use a lot more oil. Tuning the idle on the 2005 is tricky and very temperature-sensitive. No burn downs but I have to pull the carbs every 2-3 years to clean the jets and ensure no varnish has built up.
Interestingly the PWC's have 150 and 200 hours of run time, respectively and both continue to run strong and have good compression on all cylinders. PWC's engines work hard all the time due to the drag of the water - like deep snow for the sleds - so these engines have plenty of 'hard time' on them. I'm not sure how the hours compare to a sled's miles, but it would appear that the more accurate fuel delivery of EFI contributes to long engine life.
I've generally been very happy with my carbed sleds, but I have to agree with the others - EFI is where it's going and pretty much where it's at now.
We also have two Polaris 600's with carbs, 2000 and 2005. While they are reliable, they both go through at least one set of plugs each year. They use a lot more oil. Tuning the idle on the 2005 is tricky and very temperature-sensitive. No burn downs but I have to pull the carbs every 2-3 years to clean the jets and ensure no varnish has built up.
Interestingly the PWC's have 150 and 200 hours of run time, respectively and both continue to run strong and have good compression on all cylinders. PWC's engines work hard all the time due to the drag of the water - like deep snow for the sleds - so these engines have plenty of 'hard time' on them. I'm not sure how the hours compare to a sled's miles, but it would appear that the more accurate fuel delivery of EFI contributes to long engine life.
I've generally been very happy with my carbed sleds, but I have to agree with the others - EFI is where it's going and pretty much where it's at now.
anonomoose
New member
Let's put it this way....would you go looking for a car or truck with a carb in it to drive everyday?
EFI is reliable, and takes the guess work out of temps atmospheric pressure and measures everything about what you are about to do, in milliseconds.
Carbed sleds are for guys who need to do something with their hands...keeps them out of trouble.
EFI is reliable, and takes the guess work out of temps atmospheric pressure and measures everything about what you are about to do, in milliseconds.
Carbed sleds are for guys who need to do something with their hands...keeps them out of trouble.
harvest1121
Well-known member
Ok how come the Skidoo carb will get 15-18mpg while the Arctic Cat and Polaris do not get any mpg well maybe 12 if your lucky. And believe me I do not do any work or mods on my sled. Ac and Polaris have alot of work to do if Skidoo does ever come out with an 800 etec. We went with a 600 etec I could not believe the mpg and the oil usuage.
Any carbed engine can be tuned to the optimum A/F ratio and get a little better mileage. The 'doo carbed engines that get the better mileage run DPM, quote from Snowtech magazine: "The Ski-Doo Digital Performance Management (DPM) found on the 2005 and 2006 PowerTek 800 engine indeed uses carburetors and is fully EPA-certified for 2006 and beyond. A carburetor, by itself, is relatively “stupid” in that it has no inputs to compensate for things like throttle position, air temperature or air pressure. Fuel is fed to the engine by virtue of a pressure differential between the float bowl and the air flow through the carb throat, or venturi. The greater the pressure difference, the more fuel delivered.
Ski-Doo electronically manipulates the float bowl pressure as a means of varying the fuel delivery, allowing them to combine smart electronics with a simple (and stupid) mechanical carburetor.
"
So 'doo basically created an electronic carb which is not unlike GM's electronic 4bbl carbs from the early 80's. The result is a carbed engine that gets higher MPG.
The 'doo ETec is direct fuel injected which is even more advanced. The oil comsumption is low because with direct injection there is no gasoline in the ports or crankcase, only air, the oil is not dilluted by the fuel so a lot less is needed. In this case a two-stroke engine actually benefits more than a 4S by removing the gas from the air/oil.
Ski-Doo electronically manipulates the float bowl pressure as a means of varying the fuel delivery, allowing them to combine smart electronics with a simple (and stupid) mechanical carburetor.
"
So 'doo basically created an electronic carb which is not unlike GM's electronic 4bbl carbs from the early 80's. The result is a carbed engine that gets higher MPG.
The 'doo ETec is direct fuel injected which is even more advanced. The oil comsumption is low because with direct injection there is no gasoline in the ports or crankcase, only air, the oil is not dilluted by the fuel so a lot less is needed. In this case a two-stroke engine actually benefits more than a 4S by removing the gas from the air/oil.
Arctic Cat efi always starts on 2nd pull. (when cold)
Doesn't foul out plugs
You don't need to change jets during the season. You know...30 degrees at home, -20 in the UP. It always runs great.
x2 on this. our family of 4 has all efi's and will never go back to carbs. no cleaning, easy starting, no choke, way less stuff to go wrong (we have a friend that has broke 2 choke cables this year alone). As i am our groups official "sled starter" i really prefer efi over carbs, and even more when sleds are cold.
02zr600 brings up perhaps the most important consideration. Are you the "Official sled starter"? (And or the Official Turner Arounder?)
Performance aside, this is actually the clincher long after you have made a purchase!
Heres a example of fall startup:
EFI sled: 1,2,starts on 3.
Carb sled: 1,2,3,4,5,10,curse,15,curse,curse,20,sputter,sputter,curse,runs weak then dies,25,runs better but dies when given gas,30(after break),runs for a few minutes(holding your breath),okay! Whoo, glad thats over!
Performance aside, this is actually the clincher long after you have made a purchase!
Heres a example of fall startup:
EFI sled: 1,2,starts on 3.
Carb sled: 1,2,3,4,5,10,curse,15,curse,curse,20,sputter,sputter,curse,runs weak then dies,25,runs better but dies when given gas,30(after break),runs for a few minutes(holding your breath),okay! Whoo, glad thats over!
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02zr600 brings up perhaps the must important consideration. Are you the "Official sled starter"? (And or the Official Turner Arounder?)
Amen to that!
Performance aside, this is actually the clincher long after you have made a purchase!
Heres a example of fall startup:
EFI sled: 1,2,starts on 3.
And if you have electric start, you can (usually) also eliminate Steps 2 & 3!
reaper969x
New member
EFI, hands down. I'll give up a couple HP in a heart beat, for the two pull reliability of EFI.