I have not witnessed the coolant spike at full load in deep snow.Thanx TRS.
Marginal is good as long as it is enough. I find my sled balances out about 133 to 140 (I'm good with that) crawlin`in the trees in this spring type weather. Last year my PC HCR (short front cooler) never did. It would continue to climb in temp and then I had to dig in. Friends following were unhappy lol.
I believe the difference is the greater amount of heat sink (material that carries the heat away from the coolers) available for the Pro coolers. `Bin watching and feeling for that lately (cause I intend to improve on this next year, extra ccs will need extra cooling lol).
Did you know that the rear bumper brackets are part of the cooling system lol. Have a "feel" lol.
I was thinking of removing the thermostat for spring (and replacing with the "correct" washer). Did you try that TRS?
Also does this set-up eliminate the "coolant spike" at full load? My sled will climb to 131-133 (and stay there 'til I back out) quickly at full load in deep snow and it is not a lack of snow on the coolers issue. It's like there is a "short-circuit" during full coolant flow in the head?? The rest of the time she is quite happy at 125.
I definately will be do what you have done here for next early season riding. You just saved me some weight and money lol.
The spring type snow conditions, that is a question I can not answer at this time. And to be honest, I hope that is a few months away.
We removed the thermostats in the 08-09 Dragons and replaced it with an aluminium washer with a .750" hole. I played with differant restriction sizes. With the 08-09 mapping they ran better and had a much longer life. An added benifit was less ice on the running boards.
The mapping in the Pro does not like coolant temps below 98F. The mapping also seems to have a negative effect when coolant temps get north of 129F. The e-tec configuration is keeping it within these parameters.