Hughes Engines 1.6 Rocker Geometry/Setup

madhatta360 said
Hey gang, got my SM heads done and installed onto the duster running .512 lift with a 1.6 rocker setup from Hughes Engines.

I’m looking for feedback from those running Hughes engines- did you use the shims provided, if so how many or feedback on stacking more than 3?

The geometry thing is all new for me/pissing me off in all honesty, I’m looking to get it close to stay reliable not racing and don’t about loosing a little lift. Spoke to Mike at b3 I know he’s the expert, not sure if I’m down to drill out my new shafts and do that if I can get close with using the shims from Hughes.

Gotta try to get this dialed in before I figure out pushrod, I have just one of the the .040 shims installed pics attached- looking for feedback on this, thanks.

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In the above photo, is that at 50% lift? Are your lifters solid or hyd? Best is to remove the rockers from one cylinder and "paint" the end of the valve stem with a marker pen. Reinstall the rockers and roll the engine over about 6 revolutions. The rocker roller will leave a wear mark where it rolls across the valve stem. You want it centered and as narrow a mark as you can get. You do not want it off to one edge or the other, or a long sweep across the valve. Hope that helps.