640 camshaft

For large-displacement engines of 110" or more with compression ratios of 10.5:1 to 11.5:1, and smaller engines, 96"-107" with compression ratios of 11.0:1 to 12.0:1
Fewer overlaps and quick ramps that help to increase cylinder pressure.
A lower T.D.C. lift facilitates assembly.
Developed for use with hydraulic tappets.
Manufactured in the USA
During assembly, the solid height of the springs, the valve clearance, the clearance between the valves and the pistons, and the clearance between the cam lobe and the sump must be checked
Requires high-lift springs.



Specifications


Brand
S&S CYCLE


Supplier reference
33-5108


Application
Exhaust, Intake


Intake cam centre
107,5°


Exhaust cam centre
112,5°


Intake closure
60°


Exhaust Clamp
20°


Intake duration
265°


Exhaust duration
265°


Intake valve lift
0,640"


Intake valve lift at TDC
0,222"


Exhaust valve lift
0,640"


Exhaust valve lift at TDC
0,192"


Product name
Camshaft


Type
Equipment


Units
Unit


Open intake valve
25°


Open Exhaust Valve
65°


Version
640 Series