Camshafts
Camshaft - 640 Series - Evolution Big Twin '84-'99
Brand: S&S CYCLE
SKU: P1460647388155
$255.95
$227.38
Taxes and shipping calculated at checkout.
640 Cam
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Product Details
Highlights
- For large displacement engines 110" and larger with 10.5:1 to 11.5:1 compression and smaller engines, 96"-107" with 11.0:1 to 12.0:1 compression.
- Less overlap and fast ramps build higher cylinder pressure.
- Lower TDC lift makes installation easier.
- Designed for use with hydraulic tappets.
- Made in the USA.
- Installer must check coil bind, valve-to-valve clearance, valve-to-piston clearance and cam lobe to case clearance.
- Requires high-lift springs.
This is for 1984-1999 Harley-Davidson big twin models with large displacement motors with compression ratios of 10.5 - 11.5:1 or smaller motors with 11:1 - 12:1 compression ratio, does not require as much compression as the 631. For hydraulic tappet, spring spacing is required.
Specifications
| Application | Intake / Exhaust |
|---|---|
| Exhaust Close Imperial | 20 |
| Exhaust Duration Imperial | 265 |
| Exhaust Lift at TDC Imperial | 0.192" |
| Exhaust Lift Imperial | 0.640" |
| Exhaust Lobe Centerline Imperial | 112.5" |
| Exhaust Open Imperial | 65 |
| Grind | 640 Series |
| Intake Close Imperial | 60 |
| Intake Duration Imperial | 265 |
| Intake Lift at TDC Imperial | 0.222" |
| Intake Lift Imperial | 0.640" |
| Intake Lobe Centerline Imperial | 107.5 |
| Intake Open Imperial | 25 |
| Riding Style | Street |
| Type | Gear |
| Units | Each |
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