Stock lifters. Comp 918 Valve Springs, steel retainers, LT4 Roller Rockers, Stock Heads,

(weight of) Retainer + locks
(weight of) spring + damper
(weight of) valve weight
(weight of) rocker arm w/o fulcrum

the above I need to calcualte effective valve mass.

Also need pushrod and lifter weights.

All info needed in grams. thanks in advance.

 

10 degree hardware with 4705-16 spring seats:
795-16 steel retainers
614-16 locks (+.050), 1.75" installed height
4705-16 spring seats, .062" thick

 

Best way to get all of that is buy it and check it out yourself, especially the rocker arm mass.

Bret

 

Yeah, normally I would and probably will but I am using the data to design a cam. Will more than likely use the same hardware regardless of specs though.

 

What software are you using? Does it want MoI of rocker? How about stiffnesses of lifter, pushrod, rocker and valve? Resonant frequency of the spring?

I'm sure you could convert the weights to grams even if you had them in ounces or long tons.

 

EA Pro. Everything except the frequency of the spring and valve stiffness. I notice I can chose not to calculate valvetrain dynamics with EA Pro . The results are very accurate for other cam profiles I have entered (not using valvetrain dynamics I guess the program just uses optimal settings?) and I do have all of the other parameters correct except the valvetrain dynamics.

 

If you don't use valvetrain dynamics you are kidding the program...and yourself. There's a lot of that going around.

Bite the bullet, buy the parts and a good scale and have at it.