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SR-71 heads hydro roller

BIG BLOCK FORD :: GENERAL TECH :: ENGINE TECH

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SR-71 heads hydro roller Empty SR-71 heads hydro roller

Post  poweredbyford on September 11th 2019, 9:00 am

Am i wrong in thinking that the SR-71 heads are conducive to a better hydraulic roller lifter setup? The reason being the longer valves and raised pedestals? Im not an engine builder but is the pushrod side-loading less of an issue with these heads?

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Post  dfree383 on September 11th 2019, 10:25 am

I don’t think hydraulic rollers are the intended application for those heads.
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Post  c.evans on September 12th 2019, 12:44 am

Yes, the valves are longer, and the rocker stud pad is raised higher. As a result the pushrods are longer than other CJ style heads. With a mechanical roller they are in the neighbor hood of 9.500" long. The longer pushrods will have less side angularity.
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