MAF and SD (was re: Re: New member intro)

[Jonathan R. Lusky]

tsakiris at ed8200.ped.pto.ford.com writes:
> |Duh, that makes sense. But it still seems like you'd have more problems with 
> |SD.  Simply driving to a different altitude would change the density of the 
> |air, and throw off the calculation. Or would it? Maybe I'm missing something 
> |wrt SD.
 
It doesn't matter what the ambient air density is.  Air density in the
intake manifold is all that matters.

> Speed density systems that I know of include a barometric pressure sensor.  I
> don't really know who the audience is here yet, so if my comments are to 
> generalized or simplified I apologize.
 
GM speed density uses only MAP.  Did Ford's aborted attempt at speed
density use a BAP sensor?  (the worst comments I've heard about that
system have all come from Dearborn :)

 
-- 
Jonathan R. Lusky                        lusky at knuth.mtsu.edu
http://frank.mtsu.edu/~lusky/               (615) 726-8700
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68 Camaro Convertible - 350 / TH350  \_/ 80 Toyota Celica - 20R / 5spd