Just a quick observation.
If two cams with similar lift have different durations,
the cam with less duration, *usually*, will have a more aggressive
lift rate, which will put more stress on the valvetrain.
I'm with you with regards to RPM.
> I did some research and found out the the 380hp/360
> Mopar crate engine uses the same stock rockers and pushrods that our
engines
> leave the factory with, and it has a more radical cam (288/292 duration,
> .501/.513 lift) than my Comp Cams cam (260/264 duration, .512/.512 lift),
> therefore a higher powerband. The valvesprings they use are about the same
> specs also (mine have 120lbs seat pressure, 310 open... theirs have 140lbs
> seat pressure, and 290 open). Why wouldn't the stock rockers be good enough
> for my engine if they're good enough for the crate engine?
>
> --
> Doug Myers
> -------------
> '99 Dakota RC/SB 5.9L/5-speed/3.92SG - 14.320@98.46mph
> R/T wheels, Nitto NT-450 275/50R17 tires, K&N Gen II FIPK, Comp Cams '604
> cam, ProGear timing chain, MP 2-bbl MPI, MP 1.92" R/T heads, Hughes' roller
> rockers, MP polished valve covers, ASP crank pulley, MP Headers, 3" Dynomax
> cat, 3" Flowmaster, Accel Supercoil, Magnecor KV-85 8.5mm Race Wires,
> Melling HV oil pump, Centerforce Dual Friction Clutch
>
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