How to make a timing tape

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(This sounds more complicated than it really is. Good luck.)
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'''2.''' You find TDC by using a piston stop and fabricate a timing "tab" (often a stiff piece of wire secured behind a convenient bolt) that aligns with the line on the damper to represent "0" or TDC.
 
'''2.''' You find TDC by using a piston stop and fabricate a timing "tab" (often a stiff piece of wire secured behind a convenient bolt) that aligns with the line on the damper to represent "0" or TDC.
  
Once TDC is established, the rest goes like this:
+
Once TDC has been established, the rest goes like this:
  
 
Using either a string, ruler or a seamstress' cloth tape measure, measure the circumference of the damper. If you only have a straight ruler, measure the diameter and multiply by 3.1416 (pi) to get the circumference.
 
Using either a string, ruler or a seamstress' cloth tape measure, measure the circumference of the damper. If you only have a straight ruler, measure the diameter and multiply by 3.1416 (pi) to get the circumference.
  
Once the circumference is known, 1/10 of this figure represents 36 degrees. Half of that is 18*, half again is 9*, etc. Doesn't matter what units you use- metric, inch, or nanoparsec's.
+
Once the circumference is known, 1/10 (10%) of this figure represents 36 degrees. Half of that is 18 degrees, half again is 9 degrees, etc. It doesn't matter what units you use- metric, inch, or nanoparsec's.
  
 
When marking your home-made tape, starting from "0", BTDC will be to the right, ATDC to the left of "0".
 
When marking your home-made tape, starting from "0", BTDC will be to the right, ATDC to the left of "0".
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They cost more than a standard light, but if you plan on tuning engines beyond the basics, it will pay for itself in the long run, IMHO.
 
They cost more than a standard light, but if you plan on tuning engines beyond the basics, it will pay for itself in the long run, IMHO.
 
This sounds more complicated than it really is. 
 
 
Good luck.
 

Revision as of 01:01, 9 August 2009

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