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HybridZ

finally got me a cam...


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... for my 460 (454 + 0.030"). It's a "low lash" mechanical roller from Cam Motion. Cam card says: (all duration numbers at 0.050", angles are in crank degrees, unless otherwise specified)

 

Lobe sep 112.2 (cam deg)

overlap 21.6

ground +4 advanced

 

Intake:

open 12.5 BTDC

centerline 108.2 ATDC

closed 48 ABDC

duration 240.5

lift 0.64178

lobe area 30.19 inches * degrees

 

Exhaust:

open 62.3 BBDC

centerline 116.2 BTDC

closed 9.1 ATDC

duration 251.4

lift 0.64553

lobe area 32.29 inches * degrees

 

 

The open/closed/overlap numbers look a little funny only because these are quoted at 0.050", instead of the more common at 0.006" or 0.020". The large disparity between intake and exhaust duration is because of the heads: Brodix Race-Rite oval port heads, which flow great on the intake side, but e/h ration ain't so hot. And the exhaust tract in general is pretty restrictive (small-tube headers, 2 1/4 pipes).

 

So, the cam goes in next month. Then clearance checks, then pushrod measurement, then.... well, let's not get too carried away here. But I did promise myself to get this car running in 2006!

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Two things...

 

Ditch your existing exhaust. After spending all that cash on the motor, you gotta get it breathing...

 

Get that low (below 1000RPM) power band dream out of your head. That car should be in the 10s when done, but it won't get there shifting below 2K rpms! :lmao:

 

Mike :cool:

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