Which fuel pump (lph)? Mathematical Approach...
#1
Which fuel pump (lph)? Mathematical Approach...
I'm trying to decide between the Walbro 190 and 255.
It seems that to determine fuel consumption you would use
(injector size) x (number of injectors) x (duty cycle) x 60 = (liters per hour)
therefore...
190lph / (4 injectors x 90% duty x 60) = 880cc
So using that, the 190 should theoritically max out with 880cc injectors at 90% duty.
How close is this theoretical number to real life?
I'm gonna be running 390cc injectors under 80% so that would be 75lph.
Based on those figures, the 190 should be more than enough for mine and most other ppl's setup on here (almost every setup i see uses 450 or 550cc injectors).
Are these figures accurate? How much error should I remove from the pump ratings?
On another note, is the Walbro 190 any quieter than the 255?
It seems that to determine fuel consumption you would use
(injector size) x (number of injectors) x (duty cycle) x 60 = (liters per hour)
therefore...
190lph / (4 injectors x 90% duty x 60) = 880cc
So using that, the 190 should theoritically max out with 880cc injectors at 90% duty.
How close is this theoretical number to real life?
I'm gonna be running 390cc injectors under 80% so that would be 75lph.
Based on those figures, the 190 should be more than enough for mine and most other ppl's setup on here (almost every setup i see uses 450 or 550cc injectors).
Are these figures accurate? How much error should I remove from the pump ratings?
On another note, is the Walbro 190 any quieter than the 255?
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