Recent content by Earlie A

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This is the way I see it as well. In essence, raise the intake plenum, raise the runners. Straighten everything out so it's a straight shot with one turn at the short side. Get rid of that gradual curving floor.

It was essential in turbine start-up or shut-down to get through the critical speeds as quickly as possible.

Years ago I worked in a coal burning and steam generating powerhouse. The steam turbines that generated electricity were up to 8' in diameter and 10' or so long and rotated at 3600 rpm. The rotating mass was several thousand pounds. In going from 0 to 3600 rpm (or 3600 rpm to 0) the turbine...

More difference than expected. Old 161.3g. New 179.6g.

Thanks to @gzig5 for sending me an old style PRW 1.6 rocker to compare to the new style. The data in the first picture shows the results of actual valve motion testing of the two rockers. The rest of the pictures show the differences in the two. Old rocker is shiny, new one is dull. In the...

Would Glidden have been using cast or billet? Is custom cast even an option today?

If you do it, link it here please.

That thread would be a great idea. Not because of derail but because I think it’s a great topic on its own.

That would be great. Even factory blueprints that could be digitized.

Ritter blocks are around $3300-$3500. Of course shipping would add a few hundred to that. Then another $1500ish for machining. So it would be at least $5000. Probably more like $5500.

This is correct. The lifter bores would have to rotate around the centerline of the cam. There is enough meat to rotate some, just wonder how much.

Wonder how much it could be corrected with lifter bushings? And how far could you cheat a cam core? 2,3,4 degrees? Wonder what Bob Glidden was using for cam cores when he welded his own blocks to 48 degrees?

Thanks. Try again.

There are certainly differences in the shape of the arm and in the angularity of the adjusting screw. It’s a little harder to tell anything about the differences in the location of the contact points which is what would really matter. Does anyone have an old PRW rocker (1.6 ratio) they would...