cold water ?

[bad93blaster]

out on my blaster today and it seemed kinda slugish. i know my carbs arent dialed in 100%. the ski always had bottom end and it seems like it is gone now. i still have 150psi in each cylinder. so my ? is would cold water through off my jetting? water temps have been between 35-45f

 

[Matt_E]

Shouldn't matter.

 

[casanova992]

do you let your engine warm up?? You should itz just like any other engine..

 

[ski4]

my skis have always been a little more crisp in cooler water

 

[bad93blaster]

do you let your engine warm up?? You should itz just like any other engine..

yes i start it on land for a couple a mins and then it idles out of the channel for maybe a mile. but it doesnt change after a hour or two of riding

 

[Idok]

how old is the fuel??

 

[bad93blaster]

fresh every ride

 

[steve802cc]

Smitty and I have both had similar experiences in cold water. Both our machines had dual cooling and ADA aftermarket heads which cool better than a stock head. What we found was the above combination would not let the motor warm up properly and it would be slugish. When we blocked off one of bypasses that came off the head both our motors ran better.

Later
Steve

 

[Matt_E]

I should clarify my lax response: The jetting shouldn't be any different. Motor performance is different indeed.

 

[Frosty]

Smitty and I have both had similar experiences in cold water. Both our machines had dual cooling and ADA aftermarket heads which cool better than a stock head. What we found was the above combination would not let the motor warm up properly and it would be slugish. When we blocked off one of bypasses that came off the head both our motors ran better.

Later
Steve

Same set up here, same experience too. I usually put a mikuni main jet in one bypass to restrict water flow, at least until the water warms a bit.

 

[steve802cc]

Same set up here, same experience too. I usually put a mikuni main jet in one bypass to restrict water flow, at least until the water warms a bit.

Yup I do basically the same thing. Run much less water thru my motors when the water is really cold.
Steve

 

[Matt_E]

What's really cold?

 

[Frosty]

What's really cold?

For me... 35-50 degrees. Below 35 we usually have ice, above 50, around here, summer. Right now, the water temp is around 50.

 

[steve802cc]

What's really cold?

With a stock type head or a head that uses a stock gasket anything below 50F. For an ADA head since they cool better a little bit higher aprox 60F.

I'm want to experiment a little more this year with operating temps. I got the impression last season that I might be running my motors a little bit cool.

Later
Steve

 

[Frosty]

I'm want to experiment a little more this year with operating temps. I got the impression last season that I might be running my motors a little bit cool.

Later
Steve

I got that Feeling too. I originally ran dual cooling when I was living in the south, where the Gulf water temps got into the 80's.

I am thinking of eliminating one bypass, and merging both head outputs into a single bypass... do you think that will have any impact, as it seams it would help to slow total water volume down.

 

[kawirider00]

when running dual cooling, i plug the pisser that dumps from the head out the side, and run the one to the pipe normal, below 50 deg, never run into any problems, also lets the motor run at temp alot better, water at ontario is 42 now, will be a month and it will be mid 50s, ill unplug it then

 

[Frosty]

when running dual cooling, i plug the pisser that dumps from the head out the side, and run the one to the pipe normal, below 50 deg, never run into any problems, also lets the motor run at temp alot better, water at ontario is 42 now, will be a month and it will be mid 50s, ill unplug it then

Curtis, I have one curcuit that feeds the pipe, and dumps over. And a second curcuit that feeds the cylinder through the bottom of the exhaust manifold, which is split with a "T" so each cylinder gets its own cooling , then two bypasses, one from each side of the head, which dump over. I don't run a line from the cylinder to the head pipe. I plug one of them, reducing water flow, however, I wonder if that creates a hotter side of the cylinder?... I seam to remember this whole conversation from another thread...

http://www.x-h2o.com/threads/1667&page=3&highlight=dual+cooling

here is my set up.

 

[Frosty]

here...

 

[kawirider00]

i only run a single inlet @1/2 inch, the water going to the pipe isnt ice cold in mine, the mani preheats, then the cylinders warm it, and then the pipe gets the warmer water, only in cold weather though, other wise i have a pisser dump it out, i also have a T before the water goes into the end of the pipe

 

[bad93blaster]

i guess im going down to one pisser