Re: High Flow MAF revisited - (Porsche 928 voltage MAF)

["Bruce Plecan" <nacelp@bright.net>]

Either sensor has the common trait, of not being linear.  Look at K Kelly's
chart.
There ain't no way some simple little V/F or F/V or combination there of is
going to do what you want, acurately.  One other option, rewrite the code,
ya right, like that is easy.  Or use a Microprocessor, and do it right..
If some one who is really good with code had enough info., that would be
doable (and with a tad more work we could have a MAP to MAF or MAF to MAP)
converter.  Now, the last option would be clever, IMHO.
  Grumpy



| I'm just nuts enough to be game, but I'm not sold on the reliability of a
| Bosch sensor... I'd much rather have a
| LT1/LS1 style MAF- seem to be more reliable, and cheaper...
| Like ya said, $300 is a lotta clams for a USED part that would probably
| work, but ya never know...
| I want to do something, but I have lots of time- car will not be on the
road
| until march/April at the earliest though... Just bought SuperRam, BBK TB,
| Flowmaster exhaust, and will be buying AFR 190's, a ZZ4 cam, and SLP 1.75
SS
| headers for it...
| BTW, looked at the Ideas for Design F/V circuit,but I'm no EE- does anyone
| have a circuit that would take 1250-11216 Hz, and turn it into 0-5v?
| Tom
|
| ----- Original Message -----
| From: "Davis" <davis@mail.eecis.udel.edu>
| To: <gmecm@efi332.eng.ohio-state.edu>
| Sent: Saturday, January 15, 2000 10:47 PM
| Subject: High Flow MAF revisited - (Porsche 928 voltage MAF)
|
|
| > I've spent a few hours going thru the archives on this again.. (I know
| about the
| > '730, the translators,  and the MAPvsMAF wars, not looking to start up
| those
| > again..)
| >
| > I found a Porsche site on the net that sells the {new,used,referb}
Bosche
| LH
| > MAFs
| > and I'm interested..From my archive anthropology I guesstimate the flow
| capacity
| > of the Porsche units to be about 1500 cfm (89mm) {500g/s).
| >
| > I'm curious if the maf still reads 0V-5V, if the connector is the same,
| how
| > low-flow/normal drivability will work out?
| >
| > Is anyone interested in being a test-subject?
| >
| http://www.mailordercentral.com/928intl/products.asp?dept=135&pagenumber=3
| >
| > I wouldn't mind doing it myself, but would have a hard time eating $300
| should
| > the project fail.  I would even contribute to a "test fund"  for someone
| to get
| > one and try it out, to spread the potential liability out a bit..
| >
| > TIA
| > mike
| >
| > http://www.eecis.udel.edu/~davis/z28
| >
| >
|