Pro Turbo track speeds?

[NM]

Ok I am sure this has been beat to death, and it's not a competition. I want to know what the Pro's are making for track speeds. Please say elevation, boost level, gearing, and snow conditions.

Our Pro with HM kit and Boost-It fuel controller running 8-9 lbs tops out at 69 mph on a fairly hard packed hill of about 25 deg. Has a 3 inch 162 track, stock gearing, and at about 7000 ft.

We were running it against a 240 hp MCX Nytro and we were dead even in track speeds.

 

[NM]

Is this really that big of a secret? I made it very clear that it was not a competition.
I am new to the whole 2 stroke turbo thing and just wanted to see if our sled was in the ballpark.

I did notice that many guys are running 11-14 lbs of boost...they must make crazy speed, it would just be nice to know what that is.

 

[AKSNOWRIDER]

Neil, maybe pm justin(silber turbos) or shain(twisted) and see what they are getting..I would like to hear the results as well......

 

[NM]

Neil, maybe pm justin(silber turbos) or shain(twisted) and see what they are getting..I would like to hear the results as well......

Not really sure why PM's are needed. It's just odd to me that nobody is giving it up.
The cat guys have thread after thread about track speeds, gearing, etc. There is also lot's of info in the Yammie section.

 

[AKSNOWRIDER]

not sure ..normally the poo guys are pretty straight forward with info..you might try starting a second thread in just the pro section..I know most guys go there for info and miss the turbo section altogeather....

 

[Robbie]

Pro Turbo track speeds

I have a twisted with 174 3". 9 pounds showing 60-61 mph while digging up a steep slope. Running board almost dragging. Nitro 240 MCX showing 65 with a 174 2.5 on the same hill same day.

 

[dcturbo]

We have 2 BD 163's 9#'s Stock gearing.... 40-45 mph Fresh deep snow
50-55 Hard pack STEEP stuff
19 top very similar

10#'s stock 45-50 powder 55-60 Hard pack or in a track while climbing.

Elev. 9500-11500.

on the trail however...... FAST.

 

[bighole1818]

With one of the shop sleds running 9#s with a 155 camo on spring snow/hardpack @5500ft we were seeing 72mph with the stock pipe and 75-76 with our prototype turbo pipe. Pipes still not finished though will be ready for fall.

 

[pinit]

here is what I have been seeing
2010 pro 163
primary clutch has 66 gram polairs weights with orange team spring
secoundary has straight 48 with black/white spring
8 pounds
stock gearing
8500-9000 feet
18 inches of wet heavy spring snow and i mean heavy snow ball making snow track speed was 48-52

I took several passes no track pouching with same resalts

I would also let off the throtle let the sled almost come to a stop and then punch it again track speed would regain to the same 48-52.

I would climb a spot where I knew that the front end was going to raise up so much that i would have to let out to keep from coming over backwards again track speeds would regain in just a sort distance.

the biggest test I had was to jump the sled going up hill and then plow back into the snow still worked great

Sled is very close to stock responce on the bottom had a stock 800 pro there to jump off and on to see how my clutch compaired. I tried several setups on this day and found the one above to work the best for me.

 

[RockyMtn.Kris]

here is what I have been seeing
2010 pro 163
primary clutch has 66 gram polairs weights with orange team spring
secoundary has straight 48 with black/white spring
8 pounds
stock gearing
8500-9000 feet
18 inches of wet heavy spring snow and i mean heavy snow ball making snow track speed was 48-52

I took several passes no track pouching with same resalts

I would also let off the throtle let the sled almost come to a stop and then punch it again track speed would regain to the same 48-52.

I would climb a spot where I knew that the front end was going to raise up so much that i would have to let out to keep from coming over backwards again track speeds would regain in just a sort distance.

the biggest test I had was to jump the sled going up hill and then plow back into the snow still worked great

Sled is very close to stock responce on the bottom had a stock 800 pro there to jump off and on to see how my clutch compaired. I tried several setups on this day and found the one above to work the best for me.

That sounds low to me for 8 pounds of boost??? What do these things do stock??

Im guessing you sold the M1000???

 

[dmkhnr]

Got to agree. My na m8 162 spun 42 mph like clockwork at 9k elev. My stock pro climed higher so it had to be in the low 40s.

 

[pinit]

maybe i did not descibe the snow condition well enough if you were going out across the flat and let off the throtle it would almost stop the sled and throw you over the handel bars very very sticky and wet and heavy. stock pro and stock xp were luck to see low 30 track speed same hill same rider.

I see several people on here talk about 70-80 mph track speeds at low boost I have had three boosted sleds 09dragon 2010 m8 and now pro. I have run all of these sled up to 12 pounds of boost in all types of snow condition never seen a sustaind 80mph track speed in deep snow hard pull.

I have also heard alot of guys tell me that there stock m8 or m1000 pulling high 40 mph track speeds but when we get ont he hill my turbo pullling track speeds mentioned in my last post(48-52) would destroye them and not just a sled lenght or two were talking 100 feet or more.

Maybe I look at track speed diffferent I look for the steepest hill with the longest run and the deepest snow i ccan find. I get a moderate run at it and check speeds all the way up and take an average. I don't call a hard packed hill a track speed test that just a up hill speed test not much different that a drag race . please correct me if I'm wrong thanks Rodger

 

[pinit]

for got to mention did see beter track speeds out of my dragon and m8 at same boost leavels but they had intercoolers and i think were makeing more power due to low charge temps the pro get hot quick

 

[hobbes]

2011 Pro with 162 powerclaw track, stock gearing, in heavy wet snow conditions I was seeing about 65-70 mph track speeds depending on slope and terrain.

I am running a Silber kit at 12 lbs, @9000 ft, 100% avgas, 74.5 gr weights.

I did try to gear it up from the stock 85 mph gearing to 95mph but I didn't like the extra belt heat in the very warm and sticky conditions we were riding in. It sure pulled hard and fast with the extra gearing though, so I think I'll be trying to gear for the 90mph range for the next trip.

I weigh 260 with gear FYI.

 

[Jkinzer]

here is what I have been seeing
2010 pro 163
primary clutch has 66 gram polairs weights with orange team spring
secoundary has straight 48 with black/white spring
8 pounds
stock gearing
8500-9000 feet
18 inches of wet heavy spring snow and i mean heavy snow ball making snow track speed was 48-52

I took several passes no track pouching with same resalts

I would also let off the throtle let the sled almost come to a stop and then punch it again track speed would regain to the same 48-52.

I would climb a spot where I knew that the front end was going to raise up so much that i would have to let out to keep from coming over backwards again track speeds would regain in just a sort distance.

the biggest test I had was to jump the sled going up hill and then plow back into the snow still worked great

Sled is very close to stock responce on the bottom had a stock 800 pro there to jump off and on to see how my clutch compaired. I tried several setups on this day and found the one above to work the best for me.

are you really running 66 gram weights? our clutching is similar i ride 6-9k feet and i run 72's and even w/ 72's i can find the rev limiter some times. granite i'm running a dragon turbo not a pro, but 66's just seem super light to me,( have piped/ported sleds puling 66's) could have something to do with your track speed being down too...

 

[pinit]

2011 Pro with 162 powerclaw track, stock gearing, in heavy wet snow conditions I was seeing about 65-70 mph track speeds depending on slope and terrain.

I am running a Silber kit at 12 lbs, @9000 ft, 100% avgas, 74.5 gr weights.

I did try to gear it up from the stock 85 mph gearing to 95mph but I didn't like the extra belt heat in the very warm and sticky conditions we were riding in. It sure pulled hard and fast with the extra gearing though, so I think I'll be trying to gear for the 90mph range for the next trip.

I weigh 260 with gear FYI.

whats you helix cut at and when you say 9000 feet that where you flat ground starts at and then goes up or that what you tickel in the climb

 

[hobbes]

We ride from 8000 to 10,000 ft.

I think Jeremy is right, I ran 66 gr weights in my Carls 860 at 6-8000 ft. It is possible you aren't loading your motor enough with that light of weight or you have some other problem going on.

 

[pinit]

are you really running 66 gram weights? our clutching is similar i ride 6-9k feet and i run 72's and even w/ 72's i can find the rev limiter some times. granite i'm running a dragon turbo not a pro, but 66's just seem super light to me,( have piped/ported sleds puling 66's) could have something to do with your track speed being down too...

on this day we were at 8800 feet and climb from there if I run at kings hill here at home 6500-8500 I pull my 73.5 gram lighting weights with the main riding around 7800on 10 pounds (but I need to stay a 8# untill intercooler is avalible). are your 72 polaris weights or lightning weights.

your piped and ported sled is an 800 polaris (dragon or pro) and it will pull 66 grams of weight at 9000 feet and again what I mean by 9000 feet thats the flat where you start from not the elevation you tickel in a climb.

We had a stock pro 155 that could only get 7800-7900 (still about 300 rpm short) 60gram polaris weights blue pink slp spring with the stock helix which is a 42 finish cut. So with that being said i don't think that a pipe and port job is going to pull 66 grams at this elevation on this sled

If you have a beter set up i'm not proud let me know I'll try it. But remember 8 pounds on the pro is about it untill bd get a intercooler.

 

[Jkinzer]

9000-9300 is at the top of our climbs around here. the clutch set up i'm running again is on a dragon not on a pro, but i run 8-10lbs of boost and build 60-70mph track speed depending on the snow conditions is as follows
team silver primary spring
epi belly buster 72 gram weights
black/orange team secondary spring
44-48-46 helix ( i believe thats what it is, its carls turbo helix)

 

[pinit]

i see the difference in are set ups you are useing clutch weight to load the motor I'm useing helix. And i have found that the pro won't pull the same weight as the dragon did. also what track are you on and how much do you weight. Mine a a 163 I'm 240 clothed. i can't wait to get an intercooler and turn this thing up thanks Rodger