i threw the "i understand" into that statement to make sure no one takes it as the gospel. my understanding only. and it still stands.

i have read the Kawi and Suzi sections of the boards i can find, and i find very few posts of stock KQ owners beating a P700 in a drag race.

i ride with a KQ and it cannot keep up with my 650i on the long easy stretches. we are trail riders and have spare gas, lunch boxes, ect... on our machines so we have never really done a drag race, but he tells me that i slowly walk away from him on the straight sections of logging road. i have no power mods. he has Gators and i have Bighorns. this adds nothing to this thread tho, because there are too many variables here.

on the regular trails, they are equals. we have had them side by side in Moab this spring and they will go the same places with the same ease.


monty

 

i would say that with efi you get good throttle response, smooth linear power, improved fuel economy, & better operation in higher elevations. i dont think there is a horse power or torque advantage/ increase. a friend of mine test rode both polaris 700's and felt no difference between them. he ended up buying the carbed version because he didnt see the extra cost and elevation change operation as nessecary.

 

Thanks Grizzkiller,

That is what I am looking for. Info about weather it increases HP and torque or not. I do understand that the throttle response and power delivery will be more linera. Good to hear from experience riders out there....all of you.

 

Engine for engine and CFM for CFM the carb will win by just a tick in the HP wars.
To do this, the carb will have to be right on the button. I can make just as much or maybe a small amount of more HP than the EFI, at a given track. Now, if I go to a different track or the weather goes south then I have to re-adjust. The EFI guy sits and smiles while I'm pulling jets.

Now, this is with cars on a race track. I'm at the same elevation all day long. A quad........well..........sometimes you are and sometimes you arn't.

All in all the two are so close they are about the same power wise.

 

Ok, and that's fine, I understand what you're saying and I'm not trying to argue your opinion and personal experiences. However, I personally believe a comparison of a 695cc single-cylinder to a 697 V-Twin (regardless of fuel-delivery systems) is an unfair comparison simply because of how 2-cylinders make power compared to 1 cylinder.

 

Dont try and find a difference in hp between FI and carb, because its almost nothing. The efi is said to help with cold starting, but i have yet to have a problem with cold starting on my 650V2. (carb) As far as the debate over KQ and Prairie, it isnt a fair comparison, the V-twin motors are more powerful stock to stock all the way through the power band.

 

Coming from the automotive side of things EFI is superior to carbs.

You can do simply amazing things with EFI that you can't do with carbs. You can get mileage gains from EFI that are not possible with a carb. Even the most advanced carbs are pretty mechanical devices that when you come right down to it deliver fuel in a pretty crude way. EFI can do it with much more precision. That precision allows you to add more horsepower and torque.

You don't have the cold weather problems. You don't have the elevation issues. You don't have the issues with off camber or rough terrain or G- forces causing fuel issues inside the carb. The acceleration is smoother and gives more driveability.

I'd be reluctant to buy a new ATV that didn't have EFI. Even a simple throttle body system would be an improvement. I know when I put a simple throttle body on our trail truck was it was like night and day.

 

Lots of good points here on both sides of the issue. EFI would be nice if they released it on the BF 800, but if they didn't that wouldn't stop me from buying it. V2, I have had no real problems starting my Brute, especially when I put the new plugs in. All in all, FI will be the only thing available in the near future anyway.

Funny side note. I went to the local Bomb dealership to kill time while my wife was shopping and the guy asks me what I have and I tell him. Then he says,
"Yeah, these Bombardiers have Visco-Lok and that is way better than the Brute and King Quad's four wheel drive system." He goes on to say that it is better because you can't steer the Brute while the diff lock is engaged and that all manufacturers are going to the Visco Lok system. It is amazing how much wrong information is out there from the stealerships. LOL

 

If AC goes Visco, i will be pi**ed off!!!!! I love the manual lock.

 

i'm still not sold on these early efi models. whats with the king quad and after market pipes? you have to buy a $250 power commander to adjust the air/fuel settings? bah! cheaper to rejet a carb. i've read in a few forums and mag articles of a few outlander efi's and rincon efi's having problems starting(hesitations). also the elevation edge that efi has? you still gotta mess with the clutch to get it to run at peak rpm and engagement so whats the difference if you rejet a carb at the same time? efi is not advanced enough yet in atv's for me. my dual carb setup on the brute and the single carb setup on my rubicon opperate flawlessly, no matter what temp it is or what angle i'm riding at. i dont ride high elevations so that advantage does not come into play for me. so, to each his own, i guess.