Fuel pressure / Flow rate formula

[Frank F Parker]

> 
> The first is from an MSD fuel management catalog/brochure I have.  It
> states that 
> 
> 
> F2 = sqrt(P2 / P1) * F1
> 
> 
> For me, I have a 20 lb injector at 40 psi and I want to check the flow
> at a maximum of 70 psi, so
> 
> F2 = sqrt(70 / 40) * 20  =  26.4 lbs/hr
> 

This is the correct one. Flow does vary with the sq root of pressure
ratio. Believe it- I verified it on the bench at pressures ranging from
30 to 90 psi.

regards,

frank parker