Finding TDC using a piston stop

[ford20]

I have a question, I understand how a piston stop works. I put the piston stop in the spark plug hole and turned it by hand CW and came up with 337 degrees and then I turned the motor CCW and came up with 277 degrees. Split the difference and I come up with 307 degrees. That should be my TDC right?

My only question, is how do I know what length to set the screw at?

I would think that if the screw is all the out into the combustion chamber it will stop the piston sooner and if it is all the way in, it won't stop the piston at all. Any help? Please? My TDC indicator is too short or else I would have used that.

 

[Fullboogie]

It doesn't matter because once you split the difference in the readings, you will end up at the same degree mark no matter the depth of the stop. Picture a pendulum swinging real wide back and forth, then picture it swinging just a little back and forth. The mid point for either swing is the same.

 

[Scott]

Sean not sure if you have seen these, may help.

http://www.s197forum.com/forum/showpost.php?p=1711086&postcount=92

http://www.s197forum.com/forum/showpost.php?p=1722715&postcount=93

 

[travelers]

What they said ^^^^^

 

[ford20]

Haha thanks guys! I think I ran into some issues degreeing my cams today so I figured I would start from the beginning and try and figure out what's happening.

 

[TexasBlownV8]

It doesn't matter because once you split the difference in the readings, you will end up at the same degree mark no matter the depth of the stop. Picture a pendulum swinging real wide back and forth, then picture it swinging just a little back and forth. The mid point for either swing is the same.

+1.

 

[05stroker]

Are you using a solid adjustable lifter (lash adjuster)?

 

[05stroker]

Are you using solid or adjustable lash adjusters (lifters)?

 

[Scott]

Are you using solid or adjustable lash adjusters (lifters)?

Like these?

http://www.s197forum.com/forum/showpost.php?p=1705264&postcount=88

 

[go302]

Scott, what did you end up using as a piston stop? I have the same kit and am having the same problem. Can't find a piston stop that fits my threads anywhere.

 

[Scott]

Scott, what did you end up using as a piston stop? I have the same kit and am having the same problem. Can't find a piston stop that fits my threads anywhere.

As per this post I made a piston stop from an old spark plug, threaded rod and a nut.

http://www.s197forum.com/forum/showpost.php?p=1711086&postcount=92

 

[go302]

You da man, thanks!