Alpha-N vs. Speed Density?

[Bruce Plecan]

Speed Density,  looks at rpm and Intake air density as primary inputs.  (MAP
system)
Aplha-N,  TPS posistion, and rpm
Grumpy


> This may be a rudimentary question, but could someone explain the
> difference between Speed-Density and Alpha-N as a strategy of controlling
> the injection system?  Please keep it simple, I don't really even
> understand what each of the terms mean.
>
> Thanks,
> -Bob Cunningham
>
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