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Old 06-20-2012, 06:25 PM
Mr. P-Body Mr. P-Body is offline
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For the 4-speed, I would agree with Comp, if a flat hydraulic is what you want. XE274H is a very popular grind and makes power to 6,000 without problem in the small block. It will be "lumpy". Springs should be about 120 at the seat. Duals are the best idea. We use Sealed Power lifters on these cams.

Vinnie has a good point. A flat tappet solid is a "happy medium" between a hydraulic and a solid roller. The XE grinds are excellent. Comp's solids seem to be rated a little higher in duration than their hydraulics. They don't "act" it. If you're thinking "230 @ .050", go for 236. Great manners and a broad power band. We've used many in Pontiacs, but also a few in small blocks, with similar results.

Use lifters with the EDM hole in the bottom (Comp has them, as does Crower and others). This will insure lobe "life". If your budget can stand it, go for the 4-7 "swap" (firing order change).

Springs need to be 140-150 at the seat. A true dual spring is called for. Break the flat tappet (hydraulic OR solid) cams "in" with only the outer springs installed. Install the inners and run it again.

FWIW

Jim
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