Vector Mtn W/O Rear Heat Exchanger?

[YaMon]

Is anyone running a Vector Mtn without the rear heat exchanger?
Just ordered a Hartman Extension (thanks Kachess) and since that changes the geometry a little I would like to just put a straight pipe across if it will not create any overheating issues. This sled does spend some time on the trails though. Thanks for your help.

 

[sledskiing]

I used a RX1 heat exchanger. Don't know what would happen if you ran without one.

 

[YaMon]

ttt

 

[talldude1]

build one out of 3/4 copper tubing. you should have a cooler back there IMO.

 

[YaMon]

but is the tubing enough surface area to effectively disperse the heat?

 

[Rx1M5]

Eventually you will need the cooling back there whether it's a low snow trail or turbo install. I mounted a U cooler, they fit nice and flat and give tons of cooling.

JMO Rx1M5

 

[snomadTT]

I ran my S/C Vector at 13 pounds of boost this weekend in marginal snow (on the lake) and had no problem cooling it. If it sat and idled for a few minutes after a couple of hard pulls it would heat to 200*, but getting rolling brought it down in a hurry. I am running a 3/4" aluminum tube in place of my rear exchanger.

I am confident that in the hills, I won't have problems.

P.S. - YaMon, let me know about those brackets!

 

[YaMon]

Mark, Thanks for the reply. Hope the Vector ran like you expected.

I am waiting for my Hartman Extension to arrive, I will see if I can make the brackets work, although MPI told me not to drill any additional holes. I was hoping that the brackets upper holes would be higher than stock so I can lower my rear end and get some weight off the skis. I will let you know later this week.

 

[dugedug]

I built what Mr. Hartmann suggested and it seems to run just as cool as w/ the stock exchanger. Check out page 2:

http://www.ty4stroke.com/viewtopic.php?t=20315&postdays=0&postorder=asc&start=15

I've got 200+ miles on it on packed trails w/out problems.

 

[akvector]

I heard to get the weight off the skis to drill a hole where the frt of the skid mounts 1" lower and that will relieve the ski pressure. I have not tried becuase I really do not think the ski pressure is that bad

That mod came straight from a yamaha dealer up here

 

[snomadTT]

4 days of riding in Cooke City - absolutely no problem with coolant temp (ran consistently 160 - 170 degrees) with the rear exchanger eliminated.

 

[YaMon]

How were the snow conditions? Did you ride very long in low snow?

 

[snomadTT]

No low snow conditions in Cooke anywhere - exactly the opposite!

 

[rx1tom]

I made a set of brakets to leep the heat exchanger in the stock position, it hangs a little below the extention now but I sometimes ride in low snow conditions so it worked out well. I will post some pics of the brackets later but here is a profile shot of the sled.

 

[doo_man]

I rode my 03 RX-1 151" with no exchanger, in low snow warm conditions and never had heat problems. It's just important to make sure no air in system!