Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

cam question

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Old 02-28-2006, 05:46 PM
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i am building a 383 stroker, i am using an eagle crank, federal mogul pistons, eagle rods, edelbrock performer intake, and holley 650 carb. my question is what size cam would be best for my setup? any help would be appreciated. thanks in advance.
Old 03-01-2006, 08:34 PM
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need more info- compression ratio, gear size, rpm range, head size, plans for use.
flat tappet, roller, solid, hydrollic ?
Old 03-02-2006, 05:20 PM
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11.5:1 compression, hydraulic flat tappet, stock heads, planning on daily driver but able to take it to the track if i want. rpm range is idle-5500rpms.
Old 03-02-2006, 08:36 PM
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That's pretty high compression for so low of an operating range... What motor and heads do you have?

If you put in a cam with that operating range, you will very likely have pinging problems even with pump premium. You'll need to cam it up a bit for the CR, but then it won't be happy in that operating range. So far I see a mismatch.

Jim
Old 03-03-2006, 06:12 PM
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oops i read wrong with my heads it is going to be 10.2:1 compression ratio.
Old 03-06-2006, 04:34 PM
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I would say the comp cams xe274 hydrallic flat tappet for the most low end torque and a nice lumpy idle, or the xe284, for mid range torque, and a radical idle. This is for earlier style small blocks, non roller cam.
Old 03-08-2006, 02:30 PM
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Have you thought about a hydraulic roller or solid roller? If you're building a motor nowadays, it doesn't make sense to stick with a flat tappet unless you have serious budget constraints. You will be leaving power and/or driveability on the table. The rollers make a much more flexible motor, IMO.

Jim



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