this was mentioned in a thread

'Doc's method of degreeing the cam by pulling a dowel pin and putting the head on the block off by one cylinder'

could some one explain this method, advantages ...

thanks

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

I can only assume it's an attempt to use the head as a piston stop...?

Seems like a lot of work if that's what it is.

I can only guess that it is within the context of rebuilding the engine, Dowel pins removed all ready, and one can see what is going on as "visual aid" to the process for those of us who are new to the cam phasing/degree process.

yeah. He mentioned and showed it in his book.

Interesting, I have never degreed a slant with the head on, its a lot easier to just use a piece of flat stock across a bore with a short through bolt as a piston stop.
Balance a pushrod straight up from a lifter against a dial indicator, direct and simple way to get the data point measurements.

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

I have always done it with head off, with strip and bolt across the cylinder.

Lou

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Home of Slant6-powered fun machines since 1988

I am the odd ball.

I have never done one with the head off.

I just use the 0.050" method for finding the tdc due to the dwell at perceived tdc.

I also don't have a good way of measuring Lift with the head off.

Greg

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http://www.youtube.com/hyperpack

I think his method is intended as a low-buck, down and dirty type method for the guy who doesn't have a lot of stuff lying around.

For most guys, having junk lying around the shop is not an issue so it's easier to use a piece of scrap metal with a 2 or 3 holes in it to make a stop.

I have done it with head off and on. Usually it is on. If it is off I have a small scrap of aluminum angle bolted to one of the head bolt holes. Another hole is directly over the lifter and I drop a push rod into that hole and set my dial indicator up right on top of that.

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

I made a plate that stretches across the #1 hole and overhangs the lifters. It has a hole for a pushrod and provides a mounting spot for the dial indicator. It also has a stop bolt for tdc.

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Official Cookie and Mater Tormentor.

I JB welded 3 old lifters end to end one at bottom cam side down with top one pushrod side up in a hunk of angle to keep all in alignment. sand off excess JB weld use as a long lifter with head off.

Richard

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Part of Tyrde-Browne Racing

In addition to using the head as an improvised piston stop, he also uses the valve gear to see when the valves have started to move, so you don't need a dial indicator.

This is done with only the #6 piston in place, so the engine still spins freely.

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Matt Cramer
1966 Dodge Dart turbo / EFI project