Found a site showing injector specifications.
http://www.caspeed.com/multec-injectors.html
One of them is...
STATIC FLOW RATE = 2.44 gr/sec
DYNAMIC FLOW RATE = 0.487 gr/sec
where DYNAMIC FLOW RATE means FLOW AT 2.5mS PULSE WIDTH AND 10.0mS REPETITION RATE. The DYNAMIC test is the 25% duty cycle, therefore we should see one fourth of STATIC data if there were no mechanical delay.
However, the DYNAMIC one is one fifth of the STATIC.
DYNAMIC = STATIC * ( 2.5mS - X ) / 10mS
0.487 = 2.44 * ( 2.5 - X ) / 10
X = 0.5mS
This injector has 0.5mS mechanical delay.
Yoshi