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S&S 124" bagger build

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Old Jan 9, 2018 | 03:20 PM
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If it was a Bandit clutch id say the gray springs with 2 washers. Good luck!
 
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Old Jan 9, 2018 | 03:29 PM
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Originally Posted by Blackstreak
Dare I ask what clutch springs anyone is using on a stock S&S 124" with a Barnett Scorpion clutch with low profile lock up pressure plate?


I would try the light and if slipping on dyno, go with medium. 635 isn't a tq monster and the lock up will help when it starts to make power. Being coil style springs. They are much easier to change w/ out taking off primary.
 
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Old Jan 9, 2018 | 04:06 PM
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Originally Posted by soft 02
If it was a Bandit clutch id say the gray springs with 2 washers. Good luck!
Thank you Soft 02!
 
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Old Jan 9, 2018 | 04:06 PM
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Originally Posted by soft 02
If it was a Bandit clutch id say the gray springs with 2 washers. Good luck!
Thank you Soft 02!
 
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Old Jan 9, 2018 | 04:07 PM
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Originally Posted by hrdtail78
I would try the light and if slipping on dyno, go with medium. 635 isn't a tq monster and the lock up will help when it starts to make power. Being coil style springs. They are much easier to change w/ out taking off primary.
Thank you!
 
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Old Jan 9, 2018 | 04:40 PM
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Whats the difference from the 640s?
My builder got them with the 124 kit...
I don’t even see any specs posted on the 635HOs
 
Last edited by Breakout110; Jan 9, 2018 at 04:41 PM.
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Old Jan 9, 2018 | 08:50 PM
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S&S 635 H.O.
Ideal comp= 10:1-11:1.
Int. Lift Duration Centerline LSA Overlap TDC
19.5/43.5 .635 243. 102. 101.3. 57 .186
Ex. Lift Duration Centerline
58.5/37.5 .635. 276. 100.5. .284

S&S 640 cams
Ideal CR= 10.5-11.5
Int. Lift. Duration Centerline LSA Overlap TDC
25/60. .640. 265. 107.5. 110. 50 .186
Ex Lift. Duration Centerline
70/25. .640. 275. 112.5. .284
 
Last edited by Blackstreak; Jan 9, 2018 at 09:23 PM.
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Old Jan 10, 2018 | 12:22 AM
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Originally Posted by Breakout110
Whats the difference from the 640s?
My builder got them with the 124 kit...
I don’t even see any specs posted on the 635HOs
I got .640 cams with the build kit too but traded them back to S&S for the .635 cams. Earlier torque delivery.
 
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Old Jan 10, 2018 | 09:11 AM
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Originally Posted by Blackstreak
Dare I ask what clutch springs anyone is using on a stock S&S 124" with a Barnett Scorpion clutch with low profile lock up pressure plate?
I emailed Chance at Barnett, he recommended 3 light and 3 medium for my build. I estimated torque in the mid 120's and ended up making 121, no slip on the dyno sheet. My guess is you will need more than I did.
 
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Old Jan 10, 2018 | 09:35 AM
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Originally Posted by Fat11Lo
I emailed Chance at Barnett, he recommended 3 light and 3 medium for my build. I estimated torque in the mid 120's and ended up making 121, no slip on the dyno sheet. My guess is you will need more than I did.
Thank you! I spoke with chance yesterday and he said to start with gold and stagger with green if I get slippage.
 
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