Rocker geometry...any help will do

[1964VW]

I'm having a crappy time trying to get the rocker geometry right...
Brand new Scat solid bolt type shafts came with all flat washers,no wavyy ones. Running stock rockers with swivel ends on a pair of CB 044's...
Some of the rockers are hitting dead on and some are to the right of the valves.
Any Info/Pics would really help!
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Jonks

[1964VW]

bump-o-rama
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Jonks

[Terry Cloyd]

[yetibone]

the rocker tips should make contact alittle off center so the valve will rotate, the seat will be kept clean, and the stem will stay lubed.

Make sure the adjuster on the rocker tip is parrallel to the valve stem at half lift to minimize side load on the valve and guide. If your cam has .500 lift at the valve, then the valve stem and adjuster should line up at .250".

[1964VW]

Offset to the right side a little-right?
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Jonks

[The Noof]

Offset to the right of center is fine.That means valve rotation will be clockwise. I don't think that the offset side is too critical, as long as you don't end up in a shimming nightmare to make it one side or the other.

[1964VW]

Anyone have a pic of what the ideal offset should look like?
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Jonks

[randy2]

With the use of swivel feel rockers the offset isn't as crirical, Just get as close to center as possible, I use the center at half lift method, when settin rocker geometry.
and attempt to keep things as strait as possible.

Takes lots of patience and time.
Well worth the effort in both performance and wear factors.

I have seen the results of someone not setting the geometry correct and having guide wear problems within a couple hundred miles.
Mainly becouse they didn't know any better and just assembled with out even checking.

[GjMan]

Bill Fisher's How to Hotrod VW Engines has a good run down on rocker arm geometry. That book was published in the early seventies, but I still find myself reaching for it regularly.

[BugNUTZ]

I have a pair of CB 044's and had geometry trouble too. Everyone is correct when they say to have it slightly off center. Another good thing to check is place the rocker arm assembly on an empty head (no valves; just sitting on your work bench) and bolt it in to make sure none of the rocker arms are binding up. This will increase friction robbing HP and reducing engine life.

Also, if you have high ratio rockers try the CB performance racing pushrod tubes and seals. They have extra clearance, so that the pushrod doesn't slap on the tube and cause premature valve train failure (another battle I fought this summer).

Brian
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Burn Rubber, Not Your Soul.

[danimal]

there is some confusion in this thread regarding valve rotation... lets make it clear so that the newbies understand.

vw motors came from the factory with valve keepers that are too big for the valve stem, which means that the valve rotates easily when the two keeper halves are put together, and locked into the valve spring retainer.

the correct way to build all vw motors typically involves shaving down keeper edges so that the two keeper halves clamp tightly around the valve stem, when everything is put together with the retainer.

so the original factory design used slightly offset rocker arms to cause the valve rotation, but with locked keepers, there is no way for the valve to rotate wrt the rocker arm... the only valve rotation you'll have is because of the spring coiling/uncoiling, or valve float.

many people believe that an offset rocker arm can still cause a valve with locked keepers to rotate, but i don't see how... judge for yourself.

most of this stuff is covered in the berg literature.
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[The Noof]

[1964VW]

Ok I played around with things and got them just off center to the right.
This was done without the valve caps on,should I run the caps if I have swivel's? or bad idea?
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Jonks

[The Noof]