Clutching the P-22 Boost

[chrisco]

Chrisco, I just changed it. I meant to say stock weights with 2g welded on the bottom/tip. We have had epi weights since December on boost sleds. Nothing I have tried has the track speed of the stock 78g with 2g welded on the bottom/tip with Stock helix and springs. I have tried 140-220, 155-222, 160-260 in the secondary. 100-275, 120-310, 145-295, 150-310, 165-310 from primary spring. I dont sell parts and I'm not a clutching expert, but I can tell the difference when changing parts out. I want to add more tip weight to the epi 76g, as I think this would be the ticket. I also ride 2000-4000'

Ok now it makes sense lol. Thanks for clearing that up that might be something to try.

 

[chrisco]

Chrisco, I just changed it. I meant to say stock weights with 2g welded on the bottom/tip. We have had epi weights since December on boost sleds. Nothing I have tried has the track speed of the stock 78g with 2g welded on the bottom/tip with Stock helix and springs. I have tried 140-220, 155-222, 160-260 in the secondary. 100-275, 120-310, 145-295, 150-310, 165-310 from primary spring. I dont sell parts and I'm not a clutching expert, but I can tell the difference when changing parts out. I want to add more tip weight to the epi 76g, as I think this would be the ticket. I also ride 2000-4000'

Also makes sense why you want to add weight to the 76 EPI weights riding at 2000-40000 because for us at 6300 to 7000 they are perfect.

 

[Reddragon800]

The stock 14-78 wights are very heel and mid heavy and a lighter spring would have not worked well. The reason Chris and I are going to the lower initial spring rate is because of all the tip weight of the EPI weights. Engagement has a weird surge with a 150 or 165 initial rate. Going to a 130 or so initial rate will take the surge away. The same reason your weights with 2g welded to the tip are working the best is simple.. they need tip weight. As stated earlier, the stock weights don't offer the final squeeze needed to push the belt up the primary. The 76 gram EPI weights are very tip heavy and squeeze so well. Picked up 5-6 mph track speed with these weights. The secondary has a relatively light secondary spring (160/240) to aid the lack of pull from the primary. Going to a 160/260 is a must with the EPI weigths.

 

[NEWDUCK]

Carls cycle kit, just add epi weights to the stock setup, brings the bottom end to life, along with the on/off throttle. But lacking the top end of the stock weights, with 2g welded onder the bottom. I just installed the s&c kit on a friend's boost today, see how it works next time were out.

What is the s&c kit? Or did you mean C&S?

 

[damx]

Yes c&s cycle & sleds, I need to read my post before posting haha.

 

[NEWDUCK]

Yes c&s cycle & sleds, I need to read my post before posting haha.

Ha gotcha. Im interested in what you think of the kit. Definitely post up the results

 

[damx]

Will do. Need better snow for a proper review

 

[diamonddave]

Fishing season opens March 12th. Normally sled season makes me late. Getting real close to throwing in the towel here. Not much to report from me, can’t test on ice or Pineapple Express rainstorms. Trudue’s border policy, 1/2 sleds. It’s over.

 

[DUDEE]

I haven’t on my personal sled(153 miles)but have 6 guys running them now.
They are liking the P85 better than the P22.
I’ll put the P85 on next week. Still waiting on 2 sets of proto weights for the P22.

Tony, I took your advice from our last phone call and tried the spring and helix from my 21 Switchback and tested it at 11ft in the Madres and WOW that 155 Boost had better back shifting and more throttle response by a long way from stock! Im here to tell ya that made a HUGH difference Tony! Hopefully you get some snow to test soon... I won't buy any of these "first to the market" Clutch kits! I'll wait for yours buddy! Thanks my Friend ! (Josh from SD)

 

[onetwothreego]

The P22 and the boost have a strange set up. The primary has 78 gram weights, and a 165/310 spring. Based off of last year and the slip it had it will require less spring and a weight that is more tip heavy. I will be using the EPI 74g BBPT weights with a 145/280 spring. The helix is too much for that much weight and doesnt have enough spring pressure. If you look at the graphs the stock set up is prone to slip on initial engagement and past 0.6" of shift with less then 400lbs of belt pressure. Basically where you will be when climbing under WOT. If you look at the belt pressure on the helix that i will be running vs the stock, it has much better belt hold and will have stronger mid range while maintaining top end pull and RPM much better then the final 44 angle on the stock helix. Lots of good information here.

View attachment 382264
View attachment 382265
View attachment 382266

Where did you get the first chart configuration from? I have the excel file on bottom two pics but not top pic with kilometers/ hour?
Thanks

 

[damx]

Does anyone know the weights of the p85 vs. P22 ?

 

[rmk800ak]

Does anyone know the weights of the p85 vs. P22 ?

Can’t remember the exact weight but they are pretty close . The P85 was a hair heavier but not by much before I sent it off to Patrick’s.


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[Kylep]

Can’t remember the exact weight but they are pretty close . The P85 was a hair heavier but not by much before I sent it off to Patrick’s.


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is it any narrower? be curious to see if they narrow up the side panels some more, even tho its already pretty narrow haha

 

[damx]

Nice, was hoping the p85 was heavier.

 

[onetwothreego]

P85 is around 9.4 lbs

 

[rmk800ak]

is it any narrower? be curious to see if they narrow up the side panels some more, even tho its already pretty narrow haha

No it’s not .


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[TRS]

New P22 without spring, weights, ring gear

 

[onetwothreego]

New P22 without spring, weights, ring gear
View attachment 387808

Add 78x3=234 grams for primary weights
Spring= 125 grams +/-
So around 9.2 lbs added
Close to P85 at 9.4 lbs
Thanks . New here but not new to the game

 

[onetwothreego]

Can someone please measure the OD of the bearing in the diagram #21
I have an assault boost coming with P22, but have a couple P85's to use just in case

 

[TRS]

1.969”
Set up another P85 for a friend, he is all smiles.