w2 valve train

Muscley MOPAR said

i hear what yours saying, but theres also the possibilty of a hardened washer against the rockers puting shavings in from the friction...in my experience the less friction on something the less stress and by putting those needle bearings in there it reduces friction and drag...but hey im no physicist

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Hi Muscley MOPAR, I've been searching alot about this subject, even exotic european stuff, Ferrari etc. So far i hanen't found anything about bearings in this application. My own conclusion is that with a properly spaced and shimed shaft assembly there is little to no thrust pressure in this area. Only advantage i could come up with would be that it may allow a little tighter clearence therefore a little more stability at very high R's and high spring pressures.

Other applications for these bearings are cam thrust and in some cases distributor gear spacing where these parts turn at half engine speed. The amount of movement at the rocker shaft is maybe 1/4" back and forth so i really don't see to much of a friction advantage.

I applaud you for thinking about this, all great ideas started with a thought. I'd like to see one of the Pro engine building members comment on this, but we'll see?

Good luck to you if you persue this, i'd like to know how it works out.

Rick