At 07:17 PM 11/23/99 EST, you wrote:
>In a message dated 11/23/99 5:46:15 PM Eastern Standard Time,
>tigers@bserv.com writes:
>> Whenever larger injectors are installed, the engine calibration must be
>> changed to match the pulse width issued to the engine's needs. A 19 lb/hr
>> injector size at 43.5 psi with a fuel pressure of 50 (close to ours) will
>> have a flow capacity of 20.37 while a 24 lb/hr injector will have a flow
>> capacity of 25.73.
>HUH?!?!?!? -Austin
What I didn't make very clear was that another way to increase a fuel
injector's output is to increase the fuel pressure. The above example
is what the flow capacities of the #19 and #24 would be in our Dakotas
since our fuel pressure is close to 50. If we increase the fuel pressure
to 55 then #19 will have a flow capacity of 21.36 and #24 will have 26.98.
While increasing fuel pressure is a simple way to richen the air/fuel ratio
for wide-open-throttle power, it also increases part-throttle fuel a far
greater percent than is necessary unless the computer is re-programmed.
Bob. Southern Ontario, Canada.
'97 Dakota CC Sport, FR, 5.2L, 3.55 SG, auto.
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