Dyno Cams P-Open Grind, Welded Lobe, Clone 13 HP GX390 Predator 420
Cams Ā
The P-Open is intended for a full tilt modified or open class. This cam offers larger duration with a lower lift. Upgraded valve springs, billet rod, and billet flywheel are mandatory. Dual springs required. A 33mm or larger carb is recommended. The lobes are welded to increase durability, extending the life of this cam.
- Engine: 390cc Honda GX390, 420cc Predators, & 13/15hp Chinese OHV
- Recommended Class: Modified / Open
- Target (MAX.) RPM: 8000+
- Spring Pressure (In / Ex): 65lbs dual spring
- Valve Lash (In/Ex): .003"
- Ignition Timing: 110 Octane 34 Deg. BTDC, Methanol 38 Deg. BTDC
- Compression Ratio: 12.5-to-1 or higher
PROFILE
|
Intake |
Exhaust |
|
|
Open: |
71 BTDC |
89 BBDC |
|
Close: |
88 ABDC |
50 ATDC |
|
Lift: |
.363" |
.367" |
|
C/L: |
106.0 ATDC |
110 BTDC |
|
DUR @ 50: |
263 Deg. |
269 Deg. |
Dyno Cams P-Open Grind, Welded Lobe, Clone 13 HP GX390 Predator 420
Cams Ā
The P-Open is intended for a full tilt modified or open class. This cam offers larger duration with a lower lift. Upgraded valve springs, billet rod, and billet flywheel are mandatory. Dual springs required. A 33mm or larger carb is recommended. The lobes are welded to increase durability, extending the life of this cam.
- Engine: 390cc Honda GX390, 420cc Predators, & 13/15hp Chinese OHV
- Recommended Class: Modified / Open
- Target (MAX.) RPM: 8000+
- Spring Pressure (In / Ex): 65lbs dual spring
- Valve Lash (In/Ex): .003"
- Ignition Timing: 110 Octane 34 Deg. BTDC, Methanol 38 Deg. BTDC
- Compression Ratio: 12.5-to-1 or higher
PROFILE
|
Intake |
Exhaust |
|
|
Open: |
71 BTDC |
89 BBDC |
|
Close: |
88 ABDC |
50 ATDC |
|
Lift: |
.363" |
.367" |
|
C/L: |
106.0 ATDC |
110 BTDC |
|
DUR @ 50: |
263 Deg. |
269 Deg. |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Cams Ā
The P-Open is intended for a full tilt modified or open class. This cam offers larger duration with a lower lift. Upgraded valve springs, billet rod, and billet flywheel are mandatory. Dual springs required. A 33mm or larger carb is recommended. The lobes are welded to increase durability, extending the life of this cam.
- Engine: 390cc Honda GX390, 420cc Predators, & 13/15hp Chinese OHV
- Recommended Class: Modified / Open
- Target (MAX.) RPM: 8000+
- Spring Pressure (In / Ex): 65lbs dual spring
- Valve Lash (In/Ex): .003"
- Ignition Timing: 110 Octane 34 Deg. BTDC, Methanol 38 Deg. BTDC
- Compression Ratio: 12.5-to-1 or higher
PROFILE
|
Intake |
Exhaust |
|
|
Open: |
71 BTDC |
89 BBDC |
|
Close: |
88 ABDC |
50 ATDC |
|
Lift: |
.363" |
.367" |
|
C/L: |
106.0 ATDC |
110 BTDC |
|
DUR @ 50: |
263 Deg. |
269 Deg. |
