Speed Density SFI -possible?

[Fred Miranda]

Steve
Several aftermarket efi systems do sequential + speed density.
The ones I know of are:
Autronic
DFI
Electomotive (the only one I know of that does MAF)
Motec
and I am sure, others.

As for speed density tuneability, as long as the engine pulls 
decent vacuum, you should be ok. The more peaks and
valleys in it's volumetric efficiency the more resolution you 
will need in your tables. I think Electomotive is the most limited
while Autronic and Motec are the best in this respect.


>I finally read some info on fuel injection systems (the basics)
>in the March issue of Car Craft, and I have a question.
>
>It seems that only MAF based systems use sequential port injection,
>and the speed density systems use batch fire injection.  
>BTW, has anyone compiled information on tunability of S-D systems?
>I couldn't find anything on the web page.