Xtreme Energyª 250/256 Hydraulic Flat Tappet Cam for Chevy Small Block. Very strong torque with excellent mileage and a smooth idle. Xtreme Energy Camsª bridge the gap between Magnum street cams and race only cams. Xtreme Energy Camsª provide increased torque, vacuum, response, and power while still providing quiet operation of the valve train and the durability required in daily driven vehicles.
Includes Cam, Lifters, Valve Springs, Retainers, Locks, Seals, & Timing Set
Includes Cam, Lifters, Valve Springs, Retainers, Locks, Seals, & Timing Set
Xtreme Energyª
Benefits:
- Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve
- More vacuum allows a step up in duration for greater performance
- Best seller; excellent all around performance in street carbureted applications
Important Considerations:
- Work best with COMP Cams¨ roller rockers and matched valve springs
- Require other performance parts (intake manifold, headers, etc.) for best performance
Dyno Results
| Camshaft Part # | 12-254-3 | Grind # | XE294H-10 |
| Duration @ 0.006": | 294¡ / 306 | Duration @ 0.050": | 250¡ / 256¡ |
| Max Lift w/ 1.5RR: | .519" / .523" | Lobe Separation: | 110¡ |
| Lobe ID#'s: | 5449 / 5231 | Intake Centerline: | 106¡ |
| Engine Type: | Chevrolet 350 Small Block | ||
| Bore: | 4.040" | Stroke: | 3.480" |
| Displacement: | 356ci | Compression: | 9.25:1 |
| Heads: | Dart Sportsman II | Intake: | Edelbrock Victor Jr. |
| Carburetor: | Holley 750 dbl. pmp. | Exhaust: | 1 3/4" Headers |
| Max Torque: | 394 ft*lbs @ 4100 RPM | Max Power: | 415 HP @ 5800 RPM |
| Manifold Vacuum: | 8" Hg @ 1000 RPM & 10.5" Hg @ 1200 RPM w/ no load. | ||
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