<div class="FTQUOTE"><begin quote>Originally posted by: TLC

<div class="FTQUOTE"><begin quote>EFI has advantages including more power, at least on the Sportsman 500s. It's 1.5 HP more than the carb H.O. They aren't rated the same power. </end quote></div>



Thats the HP Power of a gas weed whacker hardly enough to be felt.</end quote></div>

It's not like the difference between an H.O. and a non-H.O. but I can still feel it. It's a fraction over 4% more power so it's not <u>nothing</u>. EFI gives a 500 the power of a 520.

 

I have an '07 700 EFI and an '02 700 Carb. Both machines are in perfect shape, and meticulously maintained. The EFI starts better in the cold. At the end of the weekend, when both machines have been riden the same amount of miles with two equal weight riders, the EFI has slightly more gas left in the tank. Top end speed is VERY comparable, with a slight nod to the EFI. The EFI seems smoother under acceleration though....it pulls the same all the way to top speed. The Carb seems to pull hard in the middle and end, but not so much right off the line. All That being said.......I would buy either machine again. I love them both.

 

tuneing EFI is "easier" than tuneing a carb, simply in the fact that you can plug an EFI atv to a computer or tuner and change settings in a min or 2. sometimes carbs are trickier to tune and that tekes more skill than simply looking at a computer model of what will happen if you chenge this or that.

EFI will take over, i dont think it will be a bad thing. EFI is more efficent. people said the same thing about EFI in cars when they first came out; that the computers would go out after a few years, but they really dont. iv only heard of a handfull of vehicles that have had computer probs. iv scavenged computers out of BEAT-TO-DEATH junkyard cars and they work fine. with all the shock an atv absorbes more vibration resistant computers will work there way onto the market.

EFI is an inevitability, but time will make it even better.
DODGE57HEMI is right, EFI vs. carb is always an arguement on here [img]i/expressions/face-icon-small-sad.gif[/img]

 

I have a Polaris 500 X2 OH 2007. Where is the battery located?

 

My only reservation to EFI is when it dies out in the middle of nowhere and it needs a new $400 fuel pump.

If I were buying new I wouldn't let EFI vs carb be one of my buying decisions.

Carburetors are disigned to function down to -40 degrees F.

 

The battery on my 2006 X2 is located in the front. Look past the right front tire from the side and it is probably right there. A little difficult to get at.

 

I hope so, both my 125hp 2003 Polaris 700XC (For Sale) and my new 2009 160 hp
MX Z Renegade 800R Power T.E.K. use twin carbs and there snowmobiles that only see the cold and snow of Norther Ontario Canada. Here is both there specs 2003 Polaris 700 XC SP Snowmobiles

And lack of power and cold weather I can tell you is not a concern with each.

The new 800R is getting the track studded now but hope it treats me as good as the Polaris always did.

 

for me- I think the big advantage of efi over carb is- little or no warm up time in the dead of winter, efficent fuel maps increasing fuel economy, optimized continous tuning while running, efi is less apt to have moisture contaminate the lines, and no fuss tuning when riding in the mountains.

I don't think there really is any big advantage with hp going with efi over a carb- carbs can make gobs of hp.

my feeling is- if carbs are so great- why is every recent (80's +) vehicle and the majority of all other off / on road vehicle & boat engines built with efi- not carbs?

I'll side with the thousands & thousands of engineers who have been hired to design top running exotic sport cars (that all run on efi) and every other manufacturer who also uses efi. There must be a clear benifit to using efi over a carb.

I know some carbed atv's have fuel pumps also...

I will say this tho- I'd rather be 100 miles from camp and have a carb issue then an efi issue- at least most carb issues can be fixed on location with basic hand tools, unlike efi's- but I'm still choosing efi over carb when I buy an atv.

 

Thats kind of misconception, efi does not warm cold engine oil any faster. Sure you can also start a carbed ATV and just ride with full choke but its still not a great idea.

 

speaking more on engine performance-

every one of my carbed dirtbikes / atvs had to run a good 5 minutes before I could open the choke up and be able to give it throttle.
Efi is start & go- the oil will warm up in a minute or two.
There's really no denying that efi enables an engine to run smoother when starting in the frigid single digit & neg degree temps regardless how well the carb is tuned.
I've even had to thaw out the float with a heatgun more then a few times on some of my carbed engines- and I've also had plenty frozen choke cables- That's not a problem with efi.