Measuring A Camshaft Specification

[christopher 5 1 Cars]

I have a bunch of cams that I want to check the specification of. E.g duration, overlap, valve lift, cam lift etc.

 

Equipment I have is:

 

Head with a cam in...

Rockers if needed (but prefer not to use this)

Dial gauge and magnetic base.

 

Now I want to measure the duration first but an not sure how to set it up. Does anyone know of a good guide I can use?

 

I have read afew guides on teh net but am unsure..

 

Should I use 0.1mm clearance and measure duration from 0.1mm lift to start duration calculation?

Or should I use 0.1mm clearance and 1mm lift to start duration calculation ?

 

Is the calculation the time the valve is off the seat on a full cam rotation X 2?

 

I would like to get sime useful figures that I can compare to something..

 

I should not that this is a TU engine I am talking about but the principles should be similar.

 

Edited March 2, 2006 by christopher

[jonD6B 0]

As you are short on answers try a search as I've found similar topics before on here.