injector size and bin questions

[Greg Hermann]

>> >What conditions are fuel injectors rated under.  If it is rated for
>> >35lbs/hr, what fuel pressure and air pressure are these rated at?
>>
>	My question is what specfic gravity of fuel are "They" using as a
>standard and what are "They" using for the weight of the fuel?  I have seen
>some using anywhere from 5.5 lb to 6 lb. per gal.

I think Stoddard solvent is the usual testing fluid, more like 6.5
#/gallon, .78 Sp. grav. Again, this may vary from one mfgr and/or injector
to another.
>
>> Also-- They are usually rated based on their flow at an 85% duty cycle:
>> Flow is measured at 85% duty cycle, then multiplied by 1/.85 to arrive at
>> the rated flow.
>>
>Sorry, I have to ask why would you flow an injector at 85%, then multiply by
>.85???   Wouldn't it be easier to flow it at 100% then multiply by 85%?
>Tim

 You lose the effect on flow of the opening and closing transients on the
flow if it is just tested wide open.

Greg