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| Re: A series Ford CFI bolt on!! |
Subject: Re: A series Ford CFI bolt on!!
by ddgonzal on 2005/10/31 3:07:58
Most EFI systems don't use the fuel pressure to vary delivery. Although it is not uncommon. On the Ford CFI system, I believe the fuel pressure is not dynamically varied, as in a "rising rate regulator" system.
In either case, the fuel pressure will have a drastic effect on correct operation, so be sure to set it appropriately. Think of it more as a baseline adjustment. The newer ford MPFI system does vary fuel pressure, but that is not the primary factor in delivering fuel flow.
In modern EFI systems injector pulse width is varied to affect fuel delivery according to calculated airflow ("speed-density", as in the CFI) or by direct measurement of airflow ("mass airflow" systems).
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