Crank/Cam

Old 05-24-2011, 04:17 PM
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Scooterz
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Default Crank/Cam

1. How much crank thrust is allowable on a stock crank shaft? 327/LE 275HP stock motor.

2. W/ Stock internals, 202/160 aluminum heads, new RPM intake, 4-spd trans, what is a good cam lift/duration without going to high but getting decent choppy sound?

3. Oil pump: stock or high volume???

4. Quiet gear drive... still pretty noisy? Bad idea/good idea? never ran one....

Just freshening this motor; keeping it pretty stock.
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Old 05-25-2011, 06:35 AM
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cncmotorsports
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4 Speed thrust clearance .005" to .009"

Hydraulic Flat tappet, Comp Cams 12-242-2 or 12-246-3, after more of a lopey sound, 12-600-4 or 12-601-4 Muther Tumper cam.

Stock Volume pump is fine for Street use.

Gear drives I would stay away from, I would stay with a good roller timing chain.
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Old 05-26-2011, 11:48 AM
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oldandtired
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Originally Posted by cncmotorsports
Gear drives I would stay away from, I would stay with a good roller timing chain.
x2 The harmonics are transferred to the crank and it's bad news for cast iron cranks.
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Old 05-27-2011, 01:59 PM
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Scooterz
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That makes sense on the gear drive... never thought about that... they must be dang rigid on internals that are stock.
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