Boost Clutching- lower elevations

[kidder17]

For the guys running Boosts in lower elevations. What are the plans for clutching? Are you having to add clutch weight? I see guys in AK running already and just wondering what set ups they have for the 0-5500’ range?


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[Dubaudi]

Pretty sure you don’t have to change it.


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[kidder17]

Pretty sure you don’t have to change it.


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Based upon what? Have been out with one?

The early season ones last spring that were out in BC were clutched to light and over RPM For the 6500’-7000’ they were running at.
My maximum riding areas are 6500’ with the average being 4000’-5000’.


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[Dubaudi]

I got to run a boost at 0-3000 last spring ran great. Soooo

We were even running data loggers for Polaris so I hope they got some great data from us.


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[jdtech65]

Based upon what? Have been out with one?

The early season ones last spring that were out in BC were clutched to light and over RPM For the 6500’-7000’ they were running at.
My maximum riding areas are 6500’ with the average being 4000’-5000’.


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The owners manual shows all the same clutching adjustments for 0-10,000 feet


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[Sheetmetalfab]

For the guys running Boosts in lower elevations. What are the plans for clutching? Are you having to add clutch weight? I see guys in AK running already and just wondering what set ups they have for the 0-5500’ range?


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The one I know of out and about is stock.

 

[Devilmanak]

Based upon what? Have been out with one?

The early season ones last spring that were out in BC were clutched to light and over RPM For the 6500’-7000’ they were running at.
My maximum riding areas are 6500’ with the average being 4000’-5000’.


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That is the whole point of both the turbo Doo and the Boost. The SAME horsepower from sea level to 10K. Same hp, same clutching.

 

[DUDEE]

That is the whole point of both the turbo Doo and the Boost. The SAME horsepower from sea level to 10K. Same hp, same clutching.

This^^^^^^ We should need to change weights.

 

[kidder17]

That is the whole point of both the turbo Doo and the Boost. The SAME horsepower from sea level to 10K. Same hp, same clutching.

Is centrifical force not effected by pressure change from Elevation change? Hence the need for weight changes in weights? Sorry, if this sounds like a dumb question- just trying to get my head wrapped around this.
For the Skidoo turbos I have seen at lower elevations, they are 8500-8600rpm and the clickers cannot adjust enough lower....

 

[chevy_man]

Is centrifical force not effected by pressure change from Elevation change? Hence the need for weight changes in weights? Sorry, if this sounds like a dumb question- just trying to get my head wrapped around this.
For the Skidoo turbos I have seen at lower elevations, they are 8500-8600rpm and the clickers cannot adjust enough lower....

Atmospheric pressure doesn't affect the springs.

It does have a very large effect on hp output in a NA engine. Adding the elevation compensating turbo kit and now your hp stays pretty flat across elevation untill you run out of turbo.

 

[damx]

My buddy's boost is hitting 8500 rpm with only 2% of brake-in done @ 2700'. I think different clutching might be needed.

 

[kidder17]

My buddy's boost is hitting 8500 rpm with only 2% of brake-in done @ 2700'. I think different clutching might be needed.

I suspected this may be the case.


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[luongo01]

mine too is hitting 8500 rpm at 4100' only 3hrs on the engine but doesn't bog or hit rev limiter at all

 

[damx]

We will be at 4000' tomorrow, so ill see what it does there. but im guessing it will be like 8800 after brake- in is over. Might need 80 or 82 g weights.

 

[turboless terry]

What are they supposed to run at?

 

[RMK-King]

What are they supposed to run at?

Burandt mentioned he liked to run it at 8400RPM the best.

 

[kidder17]

Bikeman video on the Stock unit was making best HP at 8000-8200..........

 

[Sheetmetalfab]

Bikeman video on the Stock unit was making best HP at 8000-8200..........

At low elevation.

 

[kidder17]

Who is going to have aftermarket 14 series weights available? Has anyone heard who is making anything yet?


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[Sheetmetalfab]

Who is going to have aftermarket 14 series weights available? Has anyone heard who is making anything yet?


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If they aren’t available a little more helix should tame the beast.