S&S 124" bagger build
#101
#102
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.
#105
#106
#107
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
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; 01-09-2018 at 09:23 PM.
The following users liked this post:
lightweight bob (05-22-2018)
#108
#109
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.
#110
Thank you! I spoke with chance yesterday and he said to start with gold and stagger with green if I get slippage.