Carb heaters


I have mine on all the time. I've never turned it off. Your brave if your going out tonight. Windchill of -40 according to the radio today.
 
I have never needed to use them. I think they are a pain in the a$$. The only place I would use them if I was in the deep snow and snow in the airbox was an issue.
 
No consequences below 0C (32f). That is what Yamaha recommends in the manual. The liquid is met to warm the carbs and gas not the air.

I saw air temperature research on a car's aluminum intake tube. It proved with temp sensors that the air temperature is not affected by this 2 feet aluminum tube compared to plastic or rubber. The speed the air comes in to the car's throttle body is to great to affect it in any significant amount.

You combined this with warm gas is easier to extract power of then cold...

I trust Yamaha's engineers when they design this feature. Why would they have it if it be better to have it off 99% of the time? Just for the mountain guys? If so they would of said it in the documentation.
 
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I am sure that it's a good idea to have the carb heaters on all the time... The warmer the fuel the easier it atomizes... as Phatboyc says, i don't think the carb heaters affect the air temperature in any way due to the speed at which it is entering the chamber.. In fact, I think colder air is desirable as you should theoretically be getting a higher volume of oxygen in the cylinder, making for a bigger bang..
 
I've had mine on all the time...after doing my homework I was told to turn em on at -15c or colder temps...its not bad around -5 / -15 but I heard yer fuel consumption goes up a bit...basically the fuel is warmer and expands...
I realized this at -2 temps when I'd pinned it and get a bog...Everything is hot under the hood and it runs a lil richer is all...
At least thats what I heard

good luck
 
the_dream_theater_nut said:
I am sure that it's a good idea to have the carb heaters on all the time... The warmer the fuel the easier it atomizes... as Phatboyc says, i don't think the carb heaters affect the air temperature in any way due to the speed at which it is entering the chamber.. In fact, I think colder air is desirable as you should theoretically be getting a higher volume of oxygen in the cylinder, making for a bigger bang..
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I don't know much about this stuff. But have you ever heard of a cold gas charge? Street guys do it by coiling their fuel lines inside of a small cooler & packing it with dry ice. Theory is that it condenses the fuel molecules allowing more fuel into the same amount of space creating more power. Wouldn't cold air & cold fuel be optimal?
 
Fro said:
I don't know much about this stuff. But have you ever heard of a cold gas charge? Street guys do it by coiling their fuel lines inside of a small cooler & packing it with dry ice. Theory is that it condenses the fuel molecules allowing more fuel into the same amount of space creating more power. Wouldn't cold air & cold fuel be optimal?
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I would definetely agree with you IF the fuel was being injected. But I do believe that warmer fuel atomizes better in a carbureted engine. I am just drawing this from my memories of grade 11 auto shop class. Some things just never leave you, like 1-8-4-3-6-5-7-2. Firing order for chevy V8. LOL
 
Fro said:
I don't know much about this stuff. But have you ever heard of a cold gas charge? Street guys do it by coiling their fuel lines inside of a small cooler & packing it with dry ice. Theory is that it condenses the fuel molecules allowing more fuel into the same amount of space creating more power. Wouldn't cold air & cold fuel be optimal?
Click to expand...

Wouldn't that also decrease gas mileage? I think I remember reading that the carb heaters help fuel economy, maybe they want to reverse that process for better economy :dunno:
 
RTYsxv said:
Wouldn't that also decrease gas mileage? I think I remember reading that the carb heaters help fuel economy, maybe they want to reverse that process for better economy :dunno:
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My last 3 tanks I've seen 12.8-13.9 mpg on my srx without the carb heaters on. I'll turn them on next time I ride and see what happens.......
 
14000 km's on my sx and i've never had a need to turn them on. Ive run in a lot of cold weather in northern Ontario with absolutly no problem. The only time I could see them doing any good is if your running in alot of deep snow and you start to injest it into the cab and air box, ( my 89 phazer was bad for this). I used to ride with a guy who had an 800 rev with carb heaters. In warm weather the sled was a real #$%&* to start after we stopped for lunch or gas. I finally convinced him :o| to shut the carb heaters off and we had no further trouble. I think the carbs were getting so hot the fuel in the bowls was evapourating when we stopped.
 
Well I kept the carb heaters on all weekend long driving in -25c to -32c. Never had a problem. At -30c was able to get 114mph on the speedo. Never seen that before.
Drove 200 miles with an Apex and my fuel was $ for $ with him. We did not run a fast pace due to frigid conditions.I did about 15 mpg on one tank.
I will use the heaters again if this deep freeze condition keeps up
:brr :brr
I took an four stroker about an hour with a heater under the hood one morning to start up and I my viper took about 30 secs with only the key and choke. :2strokes: lol

All in all a good time had by all
:winterrul
 
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