Turbo, clutching, gearing ... Help

[ClutchMaster]

 

[ClutchMaster]

Arctic cat red/white not anything fancy. Since the tangs are in different locations on cat springs the numbers won't match for twist degrees. setting 0-1 is about 60 degrees. its not titanium

 

[Yamadog]

I gave a set of 21/41 gears to Bleedyamaha for his N/A LTX ad he is getting 107 mph.

Last year on My XTX with 21/41 and the smaller 8 tooth 3.0 driver was getting 112 mph at 13 #'s of boost.
Now I have my 15 with 7#'s hitting 114 with a lot more to go (still in break in) and it is clutched for 10.5#'s of boost so should get to 123 ish on the 26/44 gears on the 8 tooth driver.

And the 14 with a 2.86 driver and I believe 27/44 gears in it should be ballistic - won't know till Tuesday!!!

 

[ApexGTman]

I need help aswell.....15 RTX LE 24/50 gears.......MPI Turbo, Intake Mounted Outside......Ulmer Kit with red Spring 6-2, "K" Helix, 2-0-2, Innovate Gauges, Boost fluctuates between 3.5#'s to 5#'s. primary shifts out to about 1/4" from edge. Low end it's like an animal, but hits a wall at about 85 or so mph.
Is there to do with my secondary? Do I need to add washers or something somewhere? Any suggestions would be great......

 

[ClutchMaster]

Need to know what your RPMs are doing up top? Not sure what rate the Ulmer red is , but k helix is 49/41 so it sounds like a yami silver could work wrapped at about the same. Or possibly try the cat red/white, With little or no twist. This is assuming the clutches are over shifting and slipping. Loose snow conditions?

 

[ApexGTman]

Need to know what your RPMs are doing up top? Not sure what rate the Ulmer red is , but k helix is 49/41 so it sounds like a yami silver could work wrapped at about the same. Or possibly try the cat red/white, With little or no twist. This is assuming the clutches are over shifting and slipping. Loose snow conditions?

In the deep snow conditions RPM's drop off to about 8500 so I guess I could take one of the washers out of the tip for deep snow conditions. I just figured with the extra power it could keep up its Rev's. Yes, snow was a little loose but not too bad when trying the top speed runs, it still hits a wall at 85 or so. If I put it on a stand and hit it for a few seconds, would the speedometer tells us anything about the shifting then or do you think it would just hit the limiter and tell us nothing?

 

[ClutchMaster]

Sounds like it's overshifting to me. I wonder if these Ulmer red springs are taking a set and relaxing somewhat? Lots of guys are saying the same thing you are. The easiest thing to try is a different spring which will probably work. Problem is I don't know the spring rates on ulmers red spring so it's hard to tell you what to go too. I would seriously try the red/white Arctic cat spring it's has worked good for me with similar helix / horsepower combinations.

 

[ClutchMaster]

Only $20 why not

 

[ClutchMaster]

My bad it must be a titanium bit more pricy$43

http://www.wahlracing.com/Arctic-Driven-Springs.html

At least it won't take a set, should last forever

 

[ApexGTman]

My bad it must be a titanium bit more pricy$43

http://www.wahlracing.com/Arctic-Driven-Springs.html

At least it won't take a set, should last forever

You think it would be worth a try with the original spring?

 

[ClutchMaster]

Probably not because a lot of guys have been complaining about this same issue with your setup. 80 degrees twist on any clutch setup has never worked well for me. I usually try to find a spring that works with around 30-60 twist. You get more rate this way and it works good with tall gears in loose snow.