COMP Cams 81216 High Energy Chevy Hydraulic Lifters
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Please NOTE the following about this product:
- This item is sold as a set.
Q & A
What's in the Box
High Energy Hydraulic lifters have a patented constant orifice metering valve that precisely meters oil to the rocker arms. Continuous contact between the metering valve and pushrod seat is maintained, eliminating excessive oiling at high engine speeds. The pushrod seat is made of a special powdered metal iron alloy that is heat-treated for strength and wear resistance.
In addition, High Energy Lifters have a lightweight check valve disc that allows for quicker response, which results in increased engine speed before valve float. This check valve disc also maintains added control at all engine speeds and loads.
COMP Cams High Energy Hydraulic Lifters also contain a longer piston than conventional hydraulic lifters, which provides more load bearing surface and increases lifter longevity.
- Chevy 348-409 (1958-65)
- Chevy 265-400
- Chevy 396-454
- Diameter: .842"
- Seat Height: 1.99"
- Weight: 94 grams
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It's not uncommon to pick up 2-3" of vacuum under 1500 RPM just by using these lifters. Normally see 25% or more increase in low-end horsepower for performance hydraulic cams.
Lifters bleed down slightly at idle and lower RPM, causing a reduction in valve duration of approximately 10° to 15°, and reducing valve lift .020" to .030" at idle.
Set of 16. All 1955-86 Chevy V8.
Stock replacement lifters at a super price! An excellent choice for street performance applications. They feature precision internal valving, for quiet, reliable valve train operation.
Maximum RPM potential limited to about 5000 rpm. For all 1955-86 Chevy V8. Set of 16.
Rhoads V-Max lifters increase low-end torque and engine vacuum up to 50% more than original Rhoads lifters. They also rev higher, making them ideal for racing classes with vacuum rules. V-Max lifters are fully adjustable and require an adjustable valvetrain.
Typical vacuum increases range between 3 to 5 inches at idle when used with bigger cams. Duration is reduced between 5 and 20 degrees at .050" lift depending on the adjustment. As the rpm increases, so does the lift and duration. Full restoration takes place at approximately 4000 rpm.
611-8178X Instructions (PDF)
As the best all-around high performance hydraulic flat tappet lifter, Race Hydraulic Lifters from COMP Cams are designed to stand up to the abuse of racing. They feature tighter plunger to body tolerances and super strict tolerances for the mechanical internals. With premium one-piece pushrod seats, heavy-duty snap rings and a lubrited cam face, Race Hydraulic Lifters offer superior performance and durability.
- Tighter plunger to body tolerances and premium one-piece pushrod seats
- Super strict tolerances for the mechanical internals optimize performance
- Extra heavy-duty snap ring design increases lifter strength and durability