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Old 02-18-2009, 05:30 PM
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454 max lift?????????

ok I am wondering, what is the max valve lift for a 454 bbc stock head?

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Old 02-18-2009, 05:49 PM
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There are many different "stock heads" in the Big Block series. Any realistic answer would need a casting no.
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Old 02-18-2009, 06:01 PM
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Would depend on a number of things...such as application or use of engine, compression ratio (piston size), chamber volume, etc. Talking to a cam grinder is always best. Even if you were to buy a complete kit from them, their still going to tell you to measure everything to be safe. It's best not to guess. For general knowledge you could also look up the GM specs. for perform big blocks and get an ideal of the combinations the factory used
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Old 02-19-2009, 01:08 AM
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This would be interesting to know for me also. I have 781 heads (November 1977 casting date). Stock everything but I am sure with whatever cam I decide to get that I would lifters springs with it also. I dont understand all this rocker arm ratio and self aligning all that tho stuff tho. Can someone explain that?
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Old 02-19-2009, 01:29 AM
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Self aligning rocker arms have a shoulder on each edge where they contact the valve stem to keep them aligned. When using pushrod guide plates these are not used.
Rocker Info.> http://www.chevytech.com/3c3.html
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Old 02-22-2009, 09:17 PM
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re

sorry computer problems
so the cam im wanting to use has Duration 276/ 286, Lift .500/ .500.
the motor is going into a mud truck and eveything but the intake and carb and headers is stock.
when it comes to the valve train im so so lost lol.
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Old 02-22-2009, 09:19 PM
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o and the motor is out of a 92 chevy 3/4ton. if that helps
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Old 02-22-2009, 09:30 PM
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you're probably okay with 500 lift, but for 100.00. you'll probably make more power with aftermarket springs and retainers, about 100.00
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Old 02-22-2009, 09:45 PM
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sweet, so should i get the dubble spring or just the single?
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Old 02-22-2009, 09:48 PM
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springs

competition products, part number vsa7 98.95 plus a little shipping... best deal i've found!
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Old 02-22-2009, 09:52 PM
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awesome, ,

o and also should i worry about valve-piston clearance?
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