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Pontiac/Oldsmobile V8 Hi-Enduance Retrofit Hyd Roller Lifters
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Part Number: 5610
* Whole number only
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These are premium quality, precision made, high performance retro-fit roller lifters. Originally developed for Off-Shore racing, they feature precision Check-Ball Metering, allowing for continuous operation at high engines speeds in a high performance endurance car or jet boat. They are also quite suitable for a daily driver, as they are quiet operation and do not require heavy spring pressure or special preload settings like some of our competitor's performance lifters. They are also available in a Short-Travel version, P/N 5610-ST, by special order only.
DETAILS
Make: Pontiac & Oldsmobile
Engine: 1955-1981 Pontiac 287-455 V8 (will not fit 265/301 low deck V8)
1964-1984 Oldsmobile 260-455 Gen II V8 (will not fit blocks w/ 0.921" lifter bores)
Series: Hi-Endurance
Type: Hydraulic Roller w/ Tie Bar (Retrofit)
Style: Retro-Fit w/ Tie-Bar/Link-Bar
Body Diameter: 0.842"
Body Height:
Pushrod Offset: None (on center)
Wheel Diameter: 0.700"
Seat Height:
Weight: 268g (pair)
Maximum RPM*: 6500 RPM
Max Spring Pressure**: 175lbs seat / 400lbs open
Min Spring Pressure**: 110lbs seat / 290lbs open
Quantity: 8 pairs
*Suggested maximum RPM only based on lifter valving. Other factors such as spring pressure, valvetrain weight, rocker ratio, and lobe stability play a large role in RPM potential. You may be able to turn more or less RPM than listed.
**Minimum and Maximum spring pressure listed are only suggestions. In general, falling under the amount listed could cause poor valve control at higher RPM, and going over could cause premature cam lobe or bearing needle wear. Your application may warrant more or less prerssure - if in doubt please call for a suggestion tailored to your exact combo
OTHER SPECIFICATIONS
- 3D CAD designed and 100% CNC machined
- Forged & carburized chromoloy steel body
- Hardened/tempered Certified 52100 steel bearing assembly
- 100% Select-fit precision machined internal components for precise leak down rate
- Check-ball metering for quiet operation and precise control at high RPM
- 100% flow checked machined steel pushrod seat for precise oil metering
- Dual oil feeds for increased oil flow to internals
- Cam-film oiling reliefs for improved roller bearing lubrication
- Mechanically Hardened Austenitic Stainless Steel Tie Bar
- Proprietary Quad-loc retaining ring
**If you have any questions in regards to the compatibility with your set-up please call before you purchase**
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