Just wondering if anybody is running slps blue/pink primary spring and what top end rpm your getting?Thanks.
SLP BLUE/PINK PRIMARY SPRING
- Thread starter sledsnowco
- Start date
T
My sleds completly stock, hits 8250-8300 RPMs at 9,500-11,500 feet.
umm..I just put slp green/pink in mine..but havent ridden it yet...will do a thread when i figure something out....
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I'm running the green/pink and a Tied clutch so that won't help you, but the green/pink will yield about 50-100 rpm more under load than the stock spring from my experience.
I have the blue pink with 10-60 weights at 60.5g Stock helix and the slp black silver in the secondary. The rpm's on the trail will hit 8350-8400. On a good pull the rpm's stay right around 8100-8200.
The clutching works great when you are in and out of the throttle.
Great back shifting.
I am sure there are a few great combos out there that work too.
The clutching works great when you are in and out of the throttle.
Great back shifting.
I am sure there are a few great combos out there that work too.
Thanks for the info dcturbo.I'm going to run the blue/pink in the primary and black/white in the secondary.I run at 9-12k and i'm trying to find a set-up that will hold 8200 in the steep and deep.Sounds like this set-up should work.Will post my findings later today.
set up
you may want to change your helix to a 60-40-46 thats what i run and a blue pink spring and a red black secondary spring and i ride the same elevation as you with 62.5 lightening weights and i run 8150 to 8200 right on the money with awsome backshift
you may want to change your helix to a 60-40-46 thats what i run and a blue pink spring and a red black secondary spring and i ride the same elevation as you with 62.5 lightening weights and i run 8150 to 8200 right on the money with awsome backshift
FYI...Hope you find it helpfull .... Thank you to RON for taking the time to actually test these springs.
Blue/Pink.... is a 140 -360 spring... if it is from SLP (using the same measurements 2.5"-1.19 as the Polaris for accurate comparison)
SLP calls this a 140-340.... but their "340" is measured at 1.25 rather than 1.19" as others use.
This will give you higher max rpms compared to the stock spring as the spring hold back the weights from closing the primary and shifting up...
(like using lighter weights)...More so than the 140-330 stock spring.
Also, this will slightly affect the backshift speed as the secondary has to fight a stronger primary spring to backshift.
Engagement/max comparisons would also depend on how fatigued the old spring was you had in there.
Blue/Pink.... is a 140 -360 spring... if it is from SLP (using the same measurements 2.5"-1.19 as the Polaris for accurate comparison)
SLP calls this a 140-340.... but their "340" is measured at 1.25 rather than 1.19" as others use.
This will give you higher max rpms compared to the stock spring as the spring hold back the weights from closing the primary and shifting up...
(like using lighter weights)...More so than the 140-330 stock spring.
Also, this will slightly affect the backshift speed as the secondary has to fight a stronger primary spring to backshift.
Engagement/max comparisons would also depend on how fatigued the old spring was you had in there.
I ran the blue/pink with 58 gram weights in the primary, and black/white with stock helix and a delrin washer today in about 2 feet of fresh.It would get about 8200 rpm and the backshifting felt good and smooth.I was only at 9-10k.Tomarrow i will probally get to 11-12,000 ft. and see how it does.Thinking of useing 56 weights if it drops off to much.
General Rule of thumb...
A Heavy weight and heavy spring combo CAN give you the same top RPM as a light weight and light spring....
BUT...
The Heavy weight and Heavy spring combo generally equates to slower backshift but with the same ultimate RPM...
Slower reaction of backshift can cause inconsistent RPM's and cause the RPM to fall and stay there (until lower load is found and the engine is allowed to rev into its power band) ....if it is outside of ideal by too much. In this situation, the Secondary will not have as much authority over the primary as it has to pull against a stronger spring/weight combo in order to close.
Light weight and light spring can give you the same ultimate RPM but will give you more responsive backshift
Faster response could give you a situation where the RPM's are always hunting since the secondary will have more authority and act twitchy
Clutching is an exercise in finding an ideal balance of many different factors. This being just one of those factors.
My 2 cents.
A Heavy weight and heavy spring combo CAN give you the same top RPM as a light weight and light spring....
BUT...
The Heavy weight and Heavy spring combo generally equates to slower backshift but with the same ultimate RPM...
Slower reaction of backshift can cause inconsistent RPM's and cause the RPM to fall and stay there (until lower load is found and the engine is allowed to rev into its power band) ....if it is outside of ideal by too much. In this situation, the Secondary will not have as much authority over the primary as it has to pull against a stronger spring/weight combo in order to close.
Light weight and light spring can give you the same ultimate RPM but will give you more responsive backshift
Faster response could give you a situation where the RPM's are always hunting since the secondary will have more authority and act twitchy
Clutching is an exercise in finding an ideal balance of many different factors. This being just one of those factors.
My 2 cents.
S
TTT for Tyson.
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I think I get credit for the thread resurrection, triggered by my googling which found it, and I then gave a MH post a thumbs up, and now here it is, 6 years in the future.
So my question comes from my Axys, but the theory should apply. MH, you discuss the repurcussions of obtaining proper WOT RPM with heavy primary weight and spring vs light weight and spring. But in my situation I'm already running pretty much the heaviest primary spring I can buy (well, one step back from it) and almost lightest primary weights I can buy, and still down on RPM. Gearing is about as high a ratio as any sled out there.
Sled is a 2016 Axys 3" 163 with factory parts except primary weights have already been dropped to 10-62.
And WOT RPM is still too low (~7900 at 7000'). What further steps can I take to get RPM up? I really don't want to have to use 10-60 weights. I'm going to buy a blue-pink spring tomorrow. Pretty much all that is left is secondary parts, right?
So my question comes from my Axys, but the theory should apply. MH, you discuss the repurcussions of obtaining proper WOT RPM with heavy primary weight and spring vs light weight and spring. But in my situation I'm already running pretty much the heaviest primary spring I can buy (well, one step back from it) and almost lightest primary weights I can buy, and still down on RPM. Gearing is about as high a ratio as any sled out there.
Sled is a 2016 Axys 3" 163 with factory parts except primary weights have already been dropped to 10-62.
And WOT RPM is still too low (~7900 at 7000'). What further steps can I take to get RPM up? I really don't want to have to use 10-60 weights. I'm going to buy a blue-pink spring tomorrow. Pretty much all that is left is secondary parts, right?
Sometimes out of parameter performance is from poor alignment, clutches that don't move smoothly, rollers that are worn or stuck.. strange helix angles etc...
Make sure all works smoothly and work back from there....
Is the secondary all stock??
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Make sure all works smoothly and work back from there....
Is the secondary all stock??
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Yes, I don't think the secondary has ever been apart.
I'm using this homestand to go through everything I can think of for regular maintenance. Compression check, TPS adjust, powervalve clean, new plugs, primary refreshed by a local Polaris primary specialist, tightened track, adjusted chain.
I'm using this homestand to go through everything I can think of for regular maintenance. Compression check, TPS adjust, powervalve clean, new plugs, primary refreshed by a local Polaris primary specialist, tightened track, adjusted chain.
You should hold 8300.
Usually, you can't get proper performance without tweaking both primary AND secondary together in combination..
If you run the blue/pink primary with 62g weights, you might want to consider the black/purple secondary spring.
Make sure you have your delrins handy.
Usually, you can't get proper performance without tweaking both primary AND secondary together in combination..
If you run the blue/pink primary with 62g weights, you might want to consider the black/purple secondary spring.
Make sure you have your delrins handy.
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