BYPASS THERMOSTAT UPGRADE (PREVIOUSLY $28 upgrade)
- Thread starter TRS
- Start date
Just looked at Terra Alps website. TA claims stock Polaris at 11.3L per minute and BRP at 26.05L per minute
Doo stat
Did this mod and tried it out today and my temps were 105 to 111 worked well on keeping the temps down and engine would get back up to temp really fast I liked the temp control this mod made but I saw no power or runability issues I have been chasing change doing this mod my rpm is still all over the place. Made no difference on that but still like what it did for my temp
Did this mod and tried it out today and my temps were 105 to 111 worked well on keeping the temps down and engine would get back up to temp really fast I liked the temp control this mod made but I saw no power or runability issues I have been chasing change doing this mod my rpm is still all over the place. Made no difference on that but still like what it did for my temp
A guy needs to be careful on flow numbers for sleds. A while ago, one sled company advertised a 100 liter/min water pump on their new 800. That is around 26+ gpm which from 10 feet away sounds about right for just a pump. I think another sled maker targets 20 some gpm for the whole system (coolers, fittings, tees, everything). 140+hp engines aren't very happy at WOT with less flow. So, numbers on the interweb, by definition, could be true but more info is needed. Stat closed, open, fully open, how many holes in the parts, cooling system connected, type of flowmeter, are all things that affect flow numbers, just sayin'...
Rick! makes some good points.
Especially the flow meter.... dumping/timing/measuring are not very accurate... not to the decimal point for sure.
The Polaris t stat is pretty small though
.
Especially the flow meter.... dumping/timing/measuring are not very accurate... not to the decimal point for sure.
The Polaris t stat is pretty small though
.
I have been using this in my turbo apex for 4 years now with no problems ,it cools much better , does not expand and overflow and cools off much faster.
MH,
Evans recommended the NPG+ C new formula(yellow). It has the lowest temp pour point. The outside temps at the time were 10F to -20F. John and I had many discussions in February about the issues I was having with the coolant. I don't know if it is the Polaris pump, pump speed, or the viscosity of the fluid that causes the problem. I dealt with it for four days. Honestly, I wanted the Evans to work. To test the system I drained the Evans, against John's wishes, and filled with standard anti-freeze. The problem was solved.
It would air entrain at RPM over 6000. I thought the stock thermostat may be causing the problem, with it not having a viable bypass system. I removed the thermostat, didn't help. I also tried it as a non-pressurized system. I won't post my conversations with John on the forum. If you would like to know PM me.
Tony
Definitely uncouth, but it'll work.
Tara Alps Stat
Anyone have experience with Tara Alp Stat, what I need is something that will help keep temps down when trail riding with the family. The BRP setup is great for lower temps in powder, but I do have to keep the wife company on the trails.....happy wife...you know the rest! Don't like to see the high 190 degree temps on the slow trail rides, using scrathers and rear flap is in good shape.
Anyone have experience with Tara Alp Stat, what I need is something that will help keep temps down when trail riding with the family. The BRP setup is great for lower temps in powder, but I do have to keep the wife company on the trails.....happy wife...you know the rest! Don't like to see the high 190 degree temps on the slow trail rides, using scrathers and rear flap is in good shape.
TRS have you installed the set-up in a turbo application yet?
I don't believe anything will bring down trail temps other than more cooler area .
A longer rear flap, scratchers, a throttle blip to spin the track every minute or so will all help. Sleds don't cool at 15mph,especially RMKs. Riding with newbies last year showed that under 21mph was steady rise in temp, 26mph was steady 125-130, faster was a non issue. Spring conditions for sure aggravate things - I used to hate waiting until 10:30am to go riding in the spring, my WA friends have converted me so I have way more time to do mods before riding...
L
Little Eddy
Well-known member
Terra Alps T Stat
I was having the same issues with slow speed traveling .... installed extra set of scratchers and long tail flap (a real pain in reverse) .... trail ride up to Boulder cabin in Revy this combo ran about 150 to 165 at wife and kid speed ... next morning I installed the Terra alps kit (kit comes complete and could be done trailside if you could catch the antifreeze) .... sled ran between 98 and 125 degrees on same trail at same speed and around 98 anytime there was good snow. It will not completely solve the overheating in poor conditions as the sled simply does not have enough cooler surface area but where the previous day I had temps as high as 195 without the kit installed the highest I saw with it was about 165 .... kit is a little pricey but a nice piece and no having to look for parts and has very good instructions
I was having the same issues with slow speed traveling .... installed extra set of scratchers and long tail flap (a real pain in reverse) .... trail ride up to Boulder cabin in Revy this combo ran about 150 to 165 at wife and kid speed ... next morning I installed the Terra alps kit (kit comes complete and could be done trailside if you could catch the antifreeze) .... sled ran between 98 and 125 degrees on same trail at same speed and around 98 anytime there was good snow. It will not completely solve the overheating in poor conditions as the sled simply does not have enough cooler surface area but where the previous day I had temps as high as 195 without the kit installed the highest I saw with it was about 165 .... kit is a little pricey but a nice piece and no having to look for parts and has very good instructions
I ran an ice trail with next to no fresh snow for 30 km on Friday. 1st 10 km sled ran @ 152 degrees with the scratchers down. Had a beer, bent the scratchers down and next 20 km, I did not go over 125!!! I guess the beer helped!!
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