Please remember also that the injector flow rate is not only dependent
on pressure (gauge and the ambient barometric), but also on the
viscosity of the fluid used in your test. Was it gasoline, mineral oil,
water, etc.? Viscosity also varies with temperature. I am sure that
the flow rate numbers published for injectors by their manufacturer are
corrected to some standard test. An analogy is how horsepower measured
on a dyno in high altitude, cold Colorado cannot be meaningfully
compared to horsepower measured in hot, sea level Florida before being
corrected to SAE or some other standard.
As for the data at that web site, all I can say is something is fishy
somewhere...either the test pressure is incorrect, some other aspect of
the flow testing is different or the actual data in the tables is wrong.
I have data from several flow tests of several sets of stock, Delphi,
LT5 injectors (both new and used) run at 43 psi which show flow rates
from the high 180s to the low 200s--basically all over the map which is
typical of Delphi injectors. In all this data there is only one injector
over 204 and it was 214 but that injector was leaking heavily and
The RCs vary from 200 to 202.
Now THAT's a good injectors.
cYa Hib Halverson
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