3.2L head valvetrain component weights for kinetic static analysis

[lvporschepilot]

Does anyone know the weight of the rocker, stock valve spring, valve, valve retainers, and stock intake valve? I'm guessing it's right around 310-320g all in but I would like to be sure.

Trying to run a more exacting static analysis for valve spring force requirements in NM for myself here, running gray-ish peak acceleration figures to give me an idea. I just cannot see how some 280lbs at the nose is needed with these beefy Eibach springs.

280lbs-ish at the nose seems high doesn't it? Even Cosworth DFV engines turning 11-12k RPM were running quite that tight, granted they didn't have a huge amount of weight to control, something like 200g per valve if I remember right.

[cgarr]

Rocker 134.4 to 137.2g
Intake valve 117.8g
Keeper pair 3g
Spring 80.8g

Rockers were different dependent on the manufacture.

[lvporschepilot]

Originally Posted by cgarr

Rocker 134.4 to 137.2g
Intake valve 117.8g
Keeper pair 3g
Spring 80.8g

Rockers were different dependent on the manufacture.

thank you!

This is a bit heavier than I initially thought. Including a standard 25g spring retainer we're talking about 363g or thereabouts. For a non-matriculated type analysis like this I would cut the spring weight in half, so call it 323g. For a typical DC43 type cam with nearly half an inch of lift and what I'm sure is a fairly hefty acceleration rate, I'm coming up with 104NM seat force (77lbs) and 341NM (252lbs) at 7500rpm, add 5-10% for the stasis fudge factors and it appears Eibach actually did a great job with those springs. I remain shocked though, seems like a lot. thanks again

[cgarr]

I included the the top spring retainer in with the spring weight, figured all moving parts.

Springs 61.5g
Top retainer 19.3

Sorry should have broken them out separate

[lvporschepilot]

OK thank you. That knocks it down about 10lbs over the nose.