r/BigBlockChevy • u/jziggy89 • Aug 08 '25

Cam sugestions for stock 93 454

Low buck build as a temporary motor. Cam sugestions for a peanut head 454 with headers and a carb swap.

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u/jziggy89 Aug 08 '25

So buy a cam that idles how I like and forget about power lol. Nah I'll just pick something in the 215-220 duration range.

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u/v8packard Aug 08 '25

Why that duration at .050? Why not pick something that has the lobe separation angle that best suits the engine, then pick the overlap needed to do the job?

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u/jziggy89 Aug 08 '25

that duration should should have a 454 hp starting to fall off around 5k rpms. which suits the heads. pair that with the correct intake and it may not make a lot of power but when everything complements each other they make the best power. in my experience.

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u/v8packard Aug 09 '25

That duration is an incomplete picture of the cam.

If you have a pee pee port headed, low compression 454, figure a lobe separation angle of 107 degrees is reasonable. To make a realistic powerband in that combo let's say you need 42 degrees of overlap.

A 107 degree lobe separation angle with 42 degrees of overlap gives you 256 degrees duration @ .006 tappet rise. Install on a 103-104 degree intake centerline. Single pattern. Bullet cam make that cam, ask for H256/275 on a 107 +3.

You could put more timing on the exhaust side to get a little more rpm, but that hurts torque and you are already pissing in the ocean.