Mountaintech
TY 4 Stroke God
BETHEVIPER, I don't think the LP carb is heated but if you PM jtssrx he can tell you whether or not it is.
lancef53
Pro
Intercooler
Thanks lincoln, I think that is where I am confused? So the RX-1 uses what is also called (on large trucks) an air to air typecooler.
Another Question--So you can go without the carb heat setup on the other turbo setups? Does it help to shut it off?
Thanks--Lance
Thanks lincoln, I think that is where I am confused? So the RX-1 uses what is also called (on large trucks) an air to air typecooler.
Another Question--So you can go without the carb heat setup on the other turbo setups? Does it help to shut it off?
Thanks--Lance
There are actually two different carb heaters on the RX/RS carbs,elecrtic and water,the electric only turns on when the water temps are low,We found on a normaly asperated RX,that turning the water off was a good thing,but turbo'd,it didn't matter,mind you,the weather never got cold enough,I don't think that you would ever need to,as there is always warm air going through the carbs. Linc.
The Carb isn't heated. I road my sled all last winter in many different conditions and temps and never had a Carb iceing problem. It would be very easy to use the Electric carb heater system on the carb we use. It would just be a matter of drilling and tapping a whole into the carb. We've looked at this already but havne't had the need.
One more thing for the most part there is very little to zero humidity in the winter time. This also helps with icing issues.
Mountaintech
TY 4 Stroke God
Humidity can be a concern in the winter. Although the midwest and the Canadian prairies typically have low humidity in the wintertime, other areas have their fair share of moisture laden air, especially in the Western Coastal Mountains. This is exactly why the manufacturers are building sleds with heated carbs.
We don't believe Humidity is an issue even in the mountains with our kit. There is enough underhood heat to keep the carb ice free. Like I said earlier to we can retrofit the carb to except the stock electric heat system. We also have a way of ducting heat from the exhaust to area.
JDKRXW
TY 4 Stroke Junkie
I just posted this in the general section regarding carb icing, but it applied here too..... carb iceing is NOT related DIRECTY to humidity. Carb ice can form when the temperature and dew point are the same. This means even at low temp, if the dew point is high enough, you will get carb ice forming, no matter what the humidity is.
Also remember that humidity is measured 'relatively' This means that in Saskatchewan, when it's -40F, the relative humidity can easily be 99% even though if seems drier than a popcorn fart outside. (the air is holding 99% of the water vapour that it possibly can, but the total amout of this vapour when measured directly is tiny).
Also remember that humidity is measured 'relatively' This means that in Saskatchewan, when it's -40F, the relative humidity can easily be 99% even though if seems drier than a popcorn fart outside. (the air is holding 99% of the water vapour that it possibly can, but the total amout of this vapour when measured directly is tiny).
Mountaintech
TY 4 Stroke God
jtssrx, yes your underhood heat will probably keep your carb from icing up, but now you're feeding your engine underhood air which can vary greatly in temperature. The scenario is not so bad if you're zipping down the trail but the mountains can be a different story. Your underhood (real life) temps will be even higher because your entire exhaust manifold, turbo, and exhaust pipe are under there too. I realize they are wrapped but they will still get nice and hot. You might want to consider heating your carb and finding a fresh air source for the intake. Feeding your engine warm air and not having an intercooler is not doing your engine any favours.
RX FUN: Our intake temps on a 70 degree day at 15 pounds are 150 degrees, they are 90 on trail boost. The temps will go down when the air temp goes down. The Turbo, Header and Exhaust pipe are all Ceramic coated. The header and exhaust are wrapped. The Turbo has a heat sheild. Our under hood heat is consistant. The question was do we have any Carb icing issues. I said we haven't had any issues. The air cleaner presently sits below a vent so it's pulling cold air. The idea to direct warm air is just idea to fix problem we don't curenntly have.
