what should be the maximim acceptable stretch be in morse chain?

Answer 1

Are you asking about Morse code?
if so, I am not sure what your question is.

the longest character in Morse code has 5 units.

All of the numbers have 5 .----. ..---, ...--, .----, -----, ----..---.., --..., -..... and .....

You can use morse to make up as long a sentence as you like. There is no limit.

Sorry if I misunderstood the question..........

Answer 2

timing chain I presume, crankshaft turns once and camshafts turn twice per crankshaft revolution, if there are sensors picking up signals from both shafts then it would depend on how much the parameters had been set for signals to be different from crank to cam. from past experience 10/11mm seems to be the max.
hope this helps
Cheers

Answer 3

max stretch of chain should be 3% hope this helps