Re: 89 MAF Volt to freq conversion

[DC Smith <morepoweral@tetranet.net>]

You got it Bro!
 I think Kendall Frederick was talkin making a 68hc11 uP converter.
Modern Muscle presently sells what's called a MAF translator to convert
the later LT-1 analog MAF to the FM signal. NOW.. if this can be done in
the code and the LT-1 maf just plugged in.. for the 7148 Grand National
computer..
 I know I'll build a converter before I buy someone else's.. Although
sometimes it's nice to buy the stuff ready to rock.. ya never know. 
I got one of the last new maf's when they went disc. It isn't going to
last forever.. :)

Thomas Matthews wrote:
> 
> You are absolutly right...I'm also shocked no one else has shown interest in
> this project now... What I figure to do is use my shop vac with some
> restrictors, get 3 or 4 points mapped for the old, the new, and try and
> construct a rough fuel curve off of this and fine tune it on the car...
> Not an elegant solution by any means, but I think I can make it work...
> Anyone have any ideas, refinements, or are you dying to have a good laugh?
> I've also thought of trying to find the exact increase in area and flow
> mathmatically, and then adjusting the LV8 variables to match so I can be in
> the ballpark.
> Terry Kelley- does your GMEPro program have this table listed? Seriously
> thinking about buying your program... Can you tell me off list what it can
> adjust?
> Anyone know of any circuit designs for freq to voltage?
> I'm basically looking at doing what Bruce proposed a few months ago...
> 
> Tom
> ----- Original Message -----
> From: "DC Smith" <morepoweral@tetranet.net>
> To: <gmecm@efi332.eng.ohio-state.edu>
> Sent: Wednesday, January 05, 2000 10:42 AM
> Subject: Re: 89 MAF Volt to freq conversion
> 
> > Hey, Tom! It's been over 2 days and no reply on this one? Gee, if it
> > were only true for the 7148 Buick GN code. It sure would puit a cramp in
> > the MAF translator sales, since the GN MAF went disc.. :) MAN! I need to
> > read more of those web pages! <grin>
> >
> >  Anybody know anything about this? Pulleeze? ;)
> >
> >  BTW, happy new year friends!
> >
> > Thomas Matthews wrote:
> > >
> > > In the ECMguy's hack of the 86 '165 bin, he has a flag for MAF type,
> voltage
> > > or frequency... Does anyone know if this is present in the 89 ARAP ($6E)
> > > calibration, and if it is there, where it is?
> > > Is it as simple as flipping the volt to frequency flag, and
> recalibrating
> > > the calibration to use a newer, higher flowing GM MAF, such as a LT1
> sensor?
> > > He also has 6 tables that define the range of a frequency MAF, but in
> the
> > > showing of the tables he has voltages- would these be the ones to
> adjust?
> > > Is some other part of the program performing a conversion from voltage
> to
> > > frequency that I have missed?
> > > Also, I've seen numerous references to VATS- I thought it did not come
> along
> > > until '88.
> > > I remember that some were heading this way a few months ago, but haven't
> > > seen anything recently...
> > > Thanks
> > > Tom
> >
> > --
> > ***********************************************************************
> > Dan Smith      84 Regal   11.841@115.09     GSCA# 1459
> > St.Charles, Missouri
> > mailto:morepoweral@tetranet.net
> > http://www.tetranet.net/users/morepoweral
> > ***********************************************************************
> >
> >

-- 
***********************************************************************
Dan Smith      84 Regal   11.841@115.09     GSCA# 1459
St.Charles, Missouri 
mailto:morepoweral@tetranet.net               
http://www.tetranet.net/users/morepoweral
***********************************************************************