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cam lift question

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Old 04-16-2006, 12:11 AM
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cam lift question

if im at .495/.503 w/ 1.5 RR's what would the new lift #'s be w/ 1.6 RR's???????
Old 04-16-2006, 12:18 AM
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Car: 1991 Z28
Engine: 305 TPI
Transmission: WC T5
Axle/Gears: 3.73 Posi
.528/.536

Last edited by matt_p; 04-16-2006 at 12:24 AM.
Old 04-16-2006, 12:24 AM
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the equation???? thanks for the response also
Old 04-16-2006, 12:26 AM
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Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
divide by 1.5 to get cam lift, then multiply by 1.6 to get new rocker lift.
Old 04-16-2006, 12:27 AM
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Car: 1991 Z28
Engine: 305 TPI
Transmission: WC T5
Axle/Gears: 3.73 Posi
valve lift = cam lift x rocker ratio

Therefore,

cam lift = valve lift / rocker ratio
Old 04-16-2006, 01:06 AM
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Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Just multiply the lift by 1.0666
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