Review and Installation: PsychoSled "Super Secret Squirrel" Nytro Clutch

[MotoPsycho]

Brian and Snake... We have a kit for all levels... Low engagement and cool clutches - boost or not. PS... The yellow Cat spring is TERRIBLE!


Sent from Moto's iPhad

 

[2Huskies]

I can attest that getting that secondary back on does take some force! Make sure the second guy is ready for when you get it set so he can get the screws on!

 

[MotoPsycho]

Did you help install our kit? If so, did you notice the secondary goes together with one hand?


Sent from Moto's iPhad

 

[MotoPsycho]

Chris... As the SC is RPM dependent, you should see right at 10 lbs of boost once the clutching is spot on. If you were experiencing low 8000's most of the time, that would explain 9.5 lbs. Remove weight to get the clutching to around 88-8900, and the boost #'s will follow suit.


Sent from Moto's iPhad

 

[christopher]

Chris... As the SC is RPM dependent, you should see right at 10 lbs of boost once the clutching is spot on. If you were experiencing low 8000's most of the time, that would explain 9.5 lbs. Remove weight to get the clutching to around 88-8900, and the boost #'s will follow suit.


Sent from Moto's iPhad

At 6,500ft on straight and level, I was turning 9,250 RPM in packed trail.
At 8,000ft, on a gentle INCLINE going uphill, I was seeing low 8,000s.
I was Not able to find a long flat surface with fresh snow on it to see what RPMs I was turning.

 

[MotoPsycho]

What was your boost level at the rev limiter? (9250)


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

 

[2Huskies]

The most common to see was 9.5 lbs. Peaking occasionally to 11 lbs but at wide open rev limiter hit it's 9.5.

(Typed for Christopher as we are driving off the mountain)

 

[MotoPsycho]

It's difficult to understand how boost #'s aren't linear based on RPM... I'm thinking the "good gauge" is telling you stories... Or...its because elevation will change max boost levels... Or, like most guys, it's hard to look at a gauge when pushing max boost... Or...

We gotta have food feedback from you guys to give you good advice!


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

 

[2Huskies]

He saw 11 lbs twice today while under acceleration, 10.5 three times under acceleration. And 9.5 every other time the entire day.

 

[MotoPsycho]

Ahhhhhh.... Well then. I would guess that the bypass valve is leaking boost. Under hard acceleration vacuum vs. boost is at a premium, allowing the valve to close fully, and tightly. Under other conditions, the valve may be held slightly open, causing boost loss. This is often a byproduct of inferior valves that utilize a very weak spring to try to circumvent compressor chuckle.

On a couple of our test sleds, we consistently run 12 lbs of boost at peak RPM, with10 lb. pulleys. It has always been my "guess", but I believe the pulley combos are advertised with a bit of leakage factored in...

It's nice to see another sled that appears to lend credence to my theory... We'll send out one of our valves to see how it stacks up..The 11.5 would be a nice bonus if it was consistent all day; wouldn't it?


Sent from Moto's iPhad

 

[christopher]

So on Saturday with the "new" gauge, I was running the display in AFR mode.

Today I switched it over to BOOST mode.

The gauge only displays in 0.5psi increments.

Anytime I held the throttle pinned, I would consistently see 9.5 displayed.

But a couple times, for JUST AN INSTANT, while going from ZERO to WOT, I caught the screen showing 11 or 10.5

But that was for just a moment and it would drop right back to 9.5

This was at 6,000ft on groomed smooth trail.

 

[MotoPsycho]

With a "true" 10 lb. pulley setup for 8-10k, I would expect 10.5-11.5 PSI @ 6k...

Just sayin.


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

 

[christopher]

With a "true" 10 lb. pulley setup for 8-10k, I would expect 10.5-11.5 PSI @ 6k...

Just sayin.


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

Well Then.
Lets see if your BOV makes any difference???

 

[christopher]

CLEANING

Moto, you mentioned there was some specific cleaning for belt brake in you wanted me to do?

Please Expound....

 

[MotoPsycho]

A nice nylon bristled brush, dishwashin soap, and a good scrubbin' to remove any "stuff".

A break in on the belt is a good idea too... 10-20 miles of less than abusive use, good heat cycling, etc... Helps belt life, but rarely happens.


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

 

[2Huskies]

Well I just blew my belt on Monday. How much would you say the nice break in helps the belt?

 

[christopher]

A nice nylon bristled brush, dishwashin soap, and a good scrubbin' to remove any "stuff".

A break in on the belt is a good idea too... 10-20 miles of less than abusive use, good heat cycling, etc... Helps belt life, but rarely happens.


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

Cleaning the BELT or the SHEEVES or BOTH?

 

[extreman1]

blow off valve

my nitro would leak past blow off valve until I tightened spring. now I am seeing 11-12 lbs boost and my pully combo was supposed to be 10lbs. so I have had the same experience with week springs

 

[MotoPsycho]

I clean clutches with scotch brite and brake cleaner every 2 rides. Belt only needs the cleaning when new.

As far as break in... It only benefits if you have good clutching to match.


Sent from Moto's iPharce 5
PsychoSled.com - Got snow?

 

[extreman1]

drag race set up

do u have a drag race clutch kit for a xtx s/c 10 lbs boost?