Axys Silber Intercooler

[doudea]

Has anyone had experience running Silber's intercooler on the Axys kit?

On my non-intercooled kit I put the 10lb spring in and it ran great, other than during wide-open pulls for 20-30 seconds it would slowly drop rpm. So Im assuming that charge temps are getting hot.

My main question is for those running the intercooler, what boost levels have you tried? Im just concerned about the stock injectors running out of duty cycle much past 10 to 12lbs?

I have an Intercooler on order, so Ill report back what my experience is once I get it on the snow.

 

[sledhead9825]

Find out who's core material Silber is using ? As far as the heat exchanger in the bottom of the bulkhead.. I don't think that will work. Skis in the air that thing will become a inter heater. IMO

 

[AKFULLTHROTTLE]

Find out who's core material Silber is using ? As far as the heat exchanger in the bottom of the bulkhead.. I don't think that will work. Skis in the air that thing will become a inter heater. IMO

Do your ski's not touch the ground? My ski's come off the ground but they also are in the snow as well. Silber is not the only under underside cooler and it see's a lot of snow.

Do you really believe it would make things worse? How would it create more heat that not having it??

 

[sledhead9825]

Do your ski's not touch the ground? My ski's come off the ground but they also are in the snow as well. Silber is not the only under underside cooler and it see's a lot of snow.

Do you really believe it would make things worse? How would it create more heat that not having it??

Put a intake temp gauge on your sled. You will see what I mean. When you are making a pull up hill when the skis are in the air, the heat exchanger is not in the snow. Thats when you need the cooler to work. You don't need it when your coming back down hill skis in the snow. Why could it possibly be worse? Depending on core material intercooler pressure will increases heat. If the little exchanger is in the air long enough it will heat soak. Big Hills and steep sidehills that exchanger is hanging in the wind. How efficient are the heat exchangers for your cooling system, when they don't have snow on them? Time to pull over and get snow on the tunnel. Proper intercooler system must have the exchanger in the tunnel. Proper intercooler must have a high quality core.. Its not a theory its my experience.

 

[AKFULLTHROTTLE]

Put a intake temp gauge on your sled. You will see what I mean. When you are making a pull up hill when the skis are in the air, the heat exchanger is not in the snow. Thats when you need the cooler to work. You don't need it when your coming back down hill skis in the snow. Why could it possibly be worse? Depending on core material intercooler pressure will increases heat. If the little exchanger is in the air long enough it will heat soak. Big Hills and steep sidehills that exchanger is hanging in the wind. How efficient are the heat exchangers for your cooling system, when they don't have snow on them? Time to pull over and get snow on the tunnel. Proper intercooler system must have the exchanger in the tunnel. Proper intercooler must have a high quality core.. Its not a theory its my experience.

And what about the 4stroke intercoolers with no snow, only air and a fan?

 

[AKFULLTHROTTLE]

I guess they are a different style just like a car intercooler with fins to cool but still just air. I dont make crazy long pulls not sure I would see the heat soak you believe I will.

 

[sledhead9825]

I guess they are a different style just like a car intercooler with fins to cool but still just air. I dont make crazy long pulls not sure I would see the heat soak you believe I will.

Maybe not for you. In the mountains big long pulls where I ride, my intercooler is working over time. Cold air is power!!!

 

[AKFULLTHROTTLE]

So your saying the pressure alone in the intercooler will heat soak it enough to heat up the coolant which will increase the temperature in the exchanger which will now allow the intercooler to heat up the intake air even hotter than if it did not have a cooler at all?

So a improper intercooler system which you are calling Silbers is that will create more heat than none?

This is a standalone system

 

[sledhead9825]

And what about the 4stroke intercoolers with no snow, only air and a fan?

Thats air 2 air. There simple and no circulation pump. Boondocker offered them at one time on 2 stroke setups. Didn't work. In the auto industry companies would love the availability of inter cooling we have being on the snow. Take advantage of it. Once you have a good intercooler its free horsepower. Your low elevation low boost so you won't see the advantages, the same as a sled at elevation and 10LBS.

 

[AKFULLTHROTTLE]

Ya we do make some good HP with low boost but 10 here is moving!

 

[sledhead9825]

Quote from Bell intercoolers

Is some intercooling better than no inter cooling?

No. It depends on the design of the intercooler, and there are two factors involved; efficiency (how much heat is removed) and the flow restriction (lost pressure) created by the presence of the intercooler. Regardless of the efficiency, if too much pressure is lost, then the intercooler is either useless or can actually decrease performance.

Check out Bell intercoolers site. Lots of good info. How much does Silber charge for his intercooler option ?

 

[aksledjunkie]

Curious, I fancy myself as a tree rider, aka, half my sled is buried in the snow at almost all times. Thus atleast half the heat exchanger would be pushing against snow, with silber's intercooler setup, as the track claws through it. Aside from the occasional tips up moments that are thrilling but short lived in the dense trees we have here around here.
So with that being said would you say that an intercooler would help or wouldn't help reduce charge temps?

 

[sledhead9825]

Curious, I fancy myself as a tree rider, aka, half my sled is buried in the snow at almost all times. Thus atleast half the heat exchanger would be pushing against snow, with silber's intercooler setup, as the track claws through it. Aside from the occasional tips up moments that are thrilling but short lived in the dense trees we have here around here.
So with that being said would you say that an intercooler would help or wouldn't help reduce charge temps?

IMO The little heat exchanger that Silber uses in the bottom of the bulkhead is just way to small. I tried one as auxiliary cooler to help cool my Pro. It did nothing. Surface area is way to small. Look at the size of exchanger MTNTK, Boost-it and OVS use in the tunnel to have a efficient system.. And there exchanger is drowned in snow from the track. What boost are you running? Are you seeing big intake temps. For you guys running lower boost (Bell says 6 and under) I wouldn't bother with a cooler. If you really want a intercooler on your sled. Buy Silbers intercooler kit and MTNTKs auxiliary tunnel exchanger. Use MTNTKs exchanger instead of silbers. First. Find out who's core material Silber is using in the air box. You HAVE to have good core material, or the whole thing is a waste of time.

 

[aksledjunkie]

IMO The little heat exchanger that Silber uses in the bottom of the bulkhead is just way to small. I tried one as auxiliary cooler to help cool my Pro. It did nothing. Surface area is way to small. Look at the size of exchanger MTNTK, Boost-it and OVS use in the tunnel to have a efficient system.. And there exchanger is drowned in snow from the track. What boost are you running? Are you seeing big intake temps. For you guys running lower boost (Bell says 6 and under) I wouldn't bother with a cooler. If you really want a intercooler on your sled. Buy Silbers intercooler kit and MTNTKs auxiliary tunnel exchanger. Use MTNTKs exchanger instead of silbers. First. Find out who's core material Silber is using in the air box. You HAVE to have good core material, or the whole thing is a waste of time.

Yeah I was looking at MTNTK's yesterday and it looks really nice.
They make a lot of nice products so not surprised.
We have successfully ran 5# but no one in Alaska that I know of with an AXYS has ran 7# and said their sled is running spot on.
AKFULLTHROTTLE had a PRO running 10# often but by his own account, the AXYS on 5# blows is a next level beast in comparison. I'm running 3# right at or near sealevel, when further inland catches up snow level wise with the coast I'll start running 5# again.

 

[tdbaugha]

Start at 4 minutes. If that describes you, you need an intercooler. Otherwise don't bother.

We do 2-3 minute pulls in the trees at 8-10psi. It creates a ton of heat. I've seen over 130 degrees coolant and intake temp on my Mtntk with their gigantic 5' cooler tunnel cooler. I cat imagine how hot a non intercooled sled would be.

 

[aksledjunkie]

Start at 4 minutes. If that describes you, you need an intercooler. Otherwise don't bother.

We do 2-3 minute pulls in the trees at 8-10psi. It creates a ton of heat. I've seen over 130 degrees coolant and intake temp on my Mtntk with their gigantic 5' cooler tunnel cooler. I cat imagine how hot a non intercooled sled would be.

Given what he said, seems like most everyone would in fact need one. After 10 seconds of a climb your charge temps increase dramatically. A few minutes in the trees again they increase dramatically.


So his account of why you would need an intercooler it doesn't matter how much boost you are running but more what you are doing? We ride very on/off throttle in the trees for a long time without stopping. Hmmmm...

 

[AKFULLTHROTTLE]

How much does Silber charge for his intercooler option ?

$750 was the price for the old style with the cooler in the air box. It has sense been redesigned to run in the middle of the boost tube, so further up stream.

Have not heard if the price has changed and still waiting to receive the updated cooler.

I like the extra cooler MTNTK sells, hard for me to grasp that a cooling system that is also cooling the engine would perform better than a stand alone system.

Justin did tell me that they did not see any boost lost to the cooler when testing.

 

[tdbaugha]

Given what he said, seems like most everyone would in fact need one. After 10 seconds of a climb your charge temps increase dramatically. A few minutes in the trees again they increase dramatically.


So his account of why you would need an intercooler it doesn't matter how much boost you are running but more what you are doing? We ride very on/off throttle in the trees for a long time without stopping. Hmmmm...

Yeah but at 3psi or whatever, you guys are not making even close to the heat we are at 8psi up here in the rockies. Compressors are at best 70% efficient. The more boost you make, the more heat generated.

And 10-20 second, WOT climb is a BIG climb. Thats like a 1000' chute in revelstoke. Not many guys are doing that. A far as trees, this is how we get our temps up tree riding. If you ride less aggressive then they stay around 80F-100F from what Ive seen.

 

[aksledjunkie]

Yeah but at 3psi or whatever, you guys are not making even close to the heat we are at 8psi up here in the rockies. Compressors are at best 70% efficient. The more boost you make, the more heat generated.

And 10-20 second, WOT climb is a BIG climb. Thats like a 1000' chute in revelstoke. Not many guys are doing that. A far as trees, this is how we get our temps up tree riding. If you ride less aggressive then they stay around 80F-100F from what Ive seen.

That's quite literally how we ride. Because of our elevation we don't need the higher boost to accomplish the same HP.
So if you had to guess, riding that aggressive with say 5# of boost what would you say the temps would be around? Non-intercooled?


Kyle we need to get a temp gauge. I hate guessing.

 

[tdbaugha]

That's quite literally how we ride. Because of our elevation we don't need the higher boost to accomplish the same HP.
So if you had to guess, riding that aggressive with say 5# of boost what would you say the temps would be around? Non-intercooled?


Kyle we need to get a temp gauge. I hate guessing.

Why don't one of you guys get the GT and data log with it. That'll tell ya.

I've only done 3-4 logs. Normal riding we're seeing around 60-90 degrees is all depending on how heat soaked the sled is.