Super Jet Should I be running dual cooling?

[SJ 701X]

Hey guys, I just got a superjet and am sort of new to the whole jet ski world, I have read about dual cooling and wonder if I need it for my ski. I have a 175 psi engine with wild porting and a b pipe. It is a 61x. I was just going to run another line in from the bilge line that was blocked off. I have been reading and I guess that two stroke engines run optimally at a certain temp and they lose performance when they get too hot or too cold. Do I need dual cooling with this setup or is it fine the way it is?

 

[txsuperjetfreak96]

Alot of it depends on water temps your running in 2

 

[SJ 701X]

It's northeast saltwater so it is usually pretty cool, when I rode it in october the pissers were still shooting out nice hot water, haven't been able to ride it in summer weather yet.

 

[tor*p*do]

"pissers" like plural?
if you have 2 outlets, you usually need 2 inlets
or restrictors

 

[SJ 701X]

There's one coming off the head and then there is another one that is teed off of the line going to the stinger from the top of the b pipe.

I am going to be adding a flow control valve to the ski also, the pisser off the head shoots out with force and the one off of the pipe has a little bit less.

 

[vma1788]

I love having a stock siphon/bigle, i don't get why people delete it (I also run a 500gph).

Ive heard that unless you're racing or doing tons of WOT pulls, it's unnecessary.

 

[iangdesign]

I have dual cooling on my 701 SJ, but single on my similarly modded 650 X2. The X2 runs very well with single. I ride in the desert though, high in the summer 115 degress, and water temps are usually near the high 80s. X2 has never over heated.

 

[SJ 701X]

I have dual cooling on my 701 SJ, but single on my similarly modded 650 X2. The X2 runs very well with single. I ride in the desert though, high in the summer 115 degress, and water temps are usually near the high 80s. X2 has never over heated.

That's what I was looking for, I shouldn't have a problem with my 701 then. Thanks.

 

[rwilliamtaylor]

I run a 61x with ADA head (180psi), B pipe wih flow control, on single cooling with two pissers ( one off the head and one off the stinger). I rant in havasu in 118 degrees and 90 degree water with no problems.

You should be good.

 

[SJ 701X]

Awesome, now, would you guys recommend hooking up the stock bilge again? Whoever had it before me blocked it off. I have a rule 500gph pump but didn't know if I should put the stocker back in.

 

[rwilliamtaylor]

I blocked mine off because I installed a scupper valve. I wouldn't want rely on a single electic bilge, because if it fails, youre f&$/Ed... especially if you ride surf. I'd recommend keeping the stock bilge or install a scupper. The scupper install is actually pretty easy and gets water out the best.

 

[SJ 701X]

I don't ride surf, and I don't want to install a scupper because if it foils and my engine is down, water will be pouring in. I think I may do another electric bilge and maybe do 2 800gph.

 

[rwilliamtaylor]

I don't ride surf, and I don't want to install a scupper because if it foils and my engine is down, water will be pouring in. I think I may do another electric bilge and maybe do 2 800gph.

Thats a sounds like a good system. My other ski has two 500gph bilges and the stock bilge just in case.i had one electric bilge fail because a piece of tie wrap blocked it.