"eyeballing" rocker geometry

[rodeking]

I was never that good at shooting pool so I came up with a little gauge to help check the rocker geometry. Just a straight edge that lays on top of the retainer and with a line scribed at the distance between the top of the retainer and the top of the Manley lash cap that I'm using. That measurement in this case is .100".

It "looks" ok here:

And this verifies it, maybe it could come up a hair but not bad. I have a little work to do with the push rod yet to get the adjuster parallel to the stem.

[rugblaster]

Looks good to me. 50% lift, right?
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'69 Karmy, '69 Camper, Meyers clone, '65 drag bug, 10.78 @ 128 (sold it) '51 Dodge farm truck,
'09 MB E350 '18 MB E400, '65 Plymouth Valiant convertible and a '19 Ford F250 King Ranch (nicer, but dirty, farm truck)

VWoA factory trained line tech 75 till 90 or so
ASE Master Certification
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La Confrerie des Chevaliers du Tastevin (San Angelo Chapter)
TCU ......GO FROGS!!!!!!

[mark tucker]

and that means??????you could extend it to see if the carb is also in tune if it's inline with that at half the moons phase.

[rugblaster]

It means the retainer (and therefore the centerline of the valve stem) is 90 degrees to the rocker shaft center at 1/2 lift.
_________________
'69 Karmy, '69 Camper, Meyers clone, '65 drag bug, 10.78 @ 128 (sold it) '51 Dodge farm truck,
'09 MB E350 '18 MB E400, '65 Plymouth Valiant convertible and a '19 Ford F250 King Ranch (nicer, but dirty, farm truck)

VWoA factory trained line tech 75 till 90 or so
ASE Master Certification
VWoA Assoc. of Quality Technicians inductee (One of 25 in the five state southwest region)
La Confrerie des Chevaliers du Tastevin (San Angelo Chapter)
TCU ......GO FROGS!!!!!!

[rodeking]

Yes, at half lift. There are arguments for setting it at 1/3,1/2, 3/4 or full. All someone needs to do is glue a strain gauge to a guide and determine where in the lift the maximum stress occurs...

[UK Luke 72]

Or plot the time/distance on a chart and look when accel peaks.
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[rodeking]

That may or may not tell you when the maximum sideways force occurs on the stem/guide because of the constantly changing angle between the rocker and the stem. It would be an interesting project though.