100 grams+12000 rpm's+big boost=?

zebiraross · Apr 19, 2011

Pulled all 3 weights and pins off the sheeve. 100 grams of weight, 12000 rpms's and 20 psi. Guess I now know the limits of the stock primary:face-icon-small-ton. It may not look like it but this clutch only has 300 miles on it.

smv sledhead · Apr 19, 2011

Ouch. Hope the crank is OK.

TBird · Apr 20, 2011

It's an Apex engine, so crank should be fine,
And OUCH, dangerous when all that mass comes flying in that speed, see positive on it and be glad you survived!

TApeX_07 · Apr 20, 2011

Thats awesome!! Makin big power :thumb:

2XM3 · Apr 20, 2011

thats why I hate cast primarys... Micro belmont is your friend.:face-icon-small-coo

And i'd check the crank, i've seen a few boosted drag R1 yammi cranks crack,yes very rare but thats a ton of force on it. IMHO

TBird · Apr 20, 2011

Must be language barrier, the clutch isn't attached to the crank, so you must mean crankcase or something

Duke · Apr 20, 2011

Supertips i presume?

2XM3 · Apr 20, 2011

My bad, forgot apex has reduction at pto unlike R1.:face-icon-small-coo

franklin · Apr 20, 2011

Looks like its time for one of these.

http://supremetoolinc.com/cart/rage-iv-billet-quad-primary-p-41.html

NM · Apr 20, 2011

I think the RPM was the killer more so than the weight. A heavier clutch may do the same thing spinning that fast. I'm not sure what the exact reduction in RPM's are, but at 12000 on the motor, the clutch was probably close to 10000 which is way past the efficiency point.

1madbird · Apr 20, 2011

Zeb glad you didnt get nailed by one of the weights coming off. that turned into a long day and night. thanks to Val for getting us out.

Thistledoo · Apr 20, 2011

Zeb is this on your new build?? I pressume it happened on a full pull?? got any pics of what got damaged?? I can pnly imagine:face-icon-small-sho

It was my new build. It took out my primary, secondary and that lower plastic piece.

twsandrew · Apr 20, 2011

Yeah, a very late evening. Zeb and I got home around 1. Thanks to Val and many others who helped

Radski30 · Apr 20, 2011

WOW!!! That is insane. I only wonder what the supreme tool clutch will do when Zeb turns it up to 30 PSI. That is CRAZY

up-high · Apr 20, 2011

I think the gear reduction was to get the clutches down to 8500 or so. No wonder the primary let go!!! lucky you didn't get hit that would have felt like getting shot :scared:

zebiraross · Apr 20, 2011

Duke said:
Supertips i presume?

Yup.

zebiraross · Apr 20, 2011

franklin said:
Looks like its time for one of these.

http://supremetoolinc.com/cart/rage-iv-billet-quad-primary-p-41.html

Thats the plan.

zebiraross · Apr 20, 2011

1madbird said:
Zeb glad you didnt get nailed by one of the weights coming off. that turned into a long day and night. thanks to Val for getting us out.

I'm sure glad a weight didn't go through my leg. Scott from Diamond S said he had a similar issue and it broke his foot:face-icon-small-sad. And thanks a million for your help! Thanks to everyone else including Val who helped.

zebiraross · Apr 20, 2011

Thistledoo said:
Zeb is this on your new build?? I pressume it happened on a full pull?? got any pics of what got damaged?? I can pnly imagine:face-icon-small-sho

It was my new build. It took out my primary, secondary and that lower plastic piece.

Ya it's off my new build. It took out my primary, secondary, and that lower plastic piece. I only found one weight, who knows where the others are, they shot off like bullets.

franklin · Apr 20, 2011

Glad you didn't get hurt. I know how it feels, had one grenade and send chunks through the hood 30ft in the air. Sounds like you guys had a decent ride, wish I could have went but my brother would have never made it with his kid on back. I'd like to plan a may ride.

100 grams+12000 rpm's+big boost=?

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