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Lifters
Pontiac V8 Lifters
Four Families, One Decision — Lifters for Pontiac V8s
Lifters are the single most important compatibility decision in a Pontiac V8 valvetrain. The lifter has to match the camshaft it rides on, the oiling the block provides, the spring pressure above it and the pushrod length below it. Put a hydraulic lifter on a solid cam or a roller lifter under a factory valley pan and the engine tells you about it quickly.
Butler splits lifters into four families: hydraulic flat tappet, solid flat tappet, hydraulic roller and solid roller. We stock Comp Cams, Hy-Lift Johnson, Johnson Lifters, Morel, Crower and Doug Herbert parts across those four, all in Pontiac-specific .842" and .903" diameters.
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More About Lifters
1. Which Family You Are In
The cam decides the family. Everything else follows from it.
| Hydraulic flat tappet | the factory arrangement on most Pontiac V8s and still the right answer for a stock or mild street rebuild. No lash adjustment in service, quiet, and the least expensive way to put an engine back together. |
| Solid flat tappet | a mechanical lifter for a solid cam. It takes a lash setting, it tolerates higher spring pressure than a hydraulic, and on a Pontiac it generally wants oil restriction and longer pushrods. |
| Hydraulic roller | retro-fit roller lifters that let a non-roller Pontiac block run a hydraulic roller cam. They cut friction and accept far more aggressive lobe profiles than a flat tappet allows. |
| Solid roller | the race answer. Needle bearing or needleless bushed, offset or straight, standard height or tall body, and every one of them requires oil restriction. |
2. The Two Gotchas That Bite Pontiac Guys
These two come up on nearly every retro-fit roller and solid roller order that goes through Butler.
| Valley pan clearance | Pontiac retro-fit hydraulic roller lifters require an aftermarket valley pan. They will hit most factory valley pans. Comp's Evolution hydraulic rollers state flatly that they will not clear a factory pan. Budget for the pan when you budget for the lifters. |
| Oil restriction | all solid roller lifters require oil restrictors in the block or restricted pushrods, and the hydraulic roller sets carry specific restriction recommendations of .020", .030" or .040" depending on the lifter travel. Butler stocks Smith Brothers restricted pushrods in all three sizes. |
3. What Changes Downstream
Changing lifter family is never just a lifter purchase.
| Pushrod length | lifter seat heights in this catalog run from roughly 2.01" on a race hydraulic flat tappet up to 2.71" on a retro-fit hydraulic roller. That spread is far more than a stock pushrod can absorb, so length has to be checked with an adjustable checker. |
| Spring pressure | a hydraulic lifter can be pumped past its limits by too much spring. A solid roller wants a lot of spring. Match the springs to the lifter and cam, not to a horsepower number. |
| New cam, new lifters | new lifters must be used when installing a new camshaft. Reusing lifters on a fresh cam is the fastest way to wipe a lobe. |
Pick the subcategory that matches your cam and work down from there. If you are still deciding between a flat tappet and a retro-fit roller, call with the block casting and the cam specs and we will walk it through.
Solid Flat Tappet Lifters Hydraulic Flat Tappet Lifters Hydraulic Roller Lifters Solid Roller Lifters
Not sure what your Pontiac needs?
Email our tech team at tech@butlerperformance.com. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.