More Projection stuff

[Fitzgearld, Fredric]

Forgive me for the simple question but what exactly is "speed density".  
How does the ECU monitor it?  Is it a related to pressure?  Is it what 
you would use to monitor manifold vacuum, instead of a MAP sensor?

Thanks,

FEF

______________________________ Reply Separator
_________________________________
Subject: Re: More Projection stuff
Author:  Bruce Plecan [SMTP:nacelp at bright.net]  at MSXGATE
Date:    4/1/98 4:04 PM


From: Fitzgearld, Fredric <fredric.fitzgearld at intel.com>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>;
Bruce Plecan <nacelp at bright.net>
Date: Wednesday, April 01, 1998 6:48 PM
Subject: RE: More Projection stuff


>HuMmmmmm...  I was told that the #502-20 (Universal 2D Digital System
>$625.) replaced the, now discontinued, 502-2 (analog system ~$500.).
>It's so new (I guess) that I didn't even see it on Holley's WEB page
>when I went to look.  The 4D and 4Di are about 2x the price.  I would
>love to have the 4Di but the low end will do just as well, for my
>application (rock crawling).  If they send me an analog system, it's
>going back.  I don't want any part of that, again.
>
>I shouldn't have any trouble tuning it as I had the analog system for a
>while.  The brain died and they said it would cost $400. to replace it.

If ya ain't gonna fix it, I'd like to talk a look inside.  Does it come with
a MAP sensor, according to the Jegs catalog, says it's speed density
Now I curious if it is better than the Alpha-N.

Also curious about the chips nos..

>FEF
>
Bruce  This message originated at CSH World Headquarters