165 Bosch MAF

[Thomas Matthews]

Ok- here's what I know...
I don't have a P/N yet... I have a buddy who used to be a Porsche mechanic,
but he hasn't been able to supply me with a PN yet. Still working on it, he
has a lot of books, but he's moved 3X in the last 2 years...
The sensor is 3.5 inside diameter approx, and is nearly identical to the TPI
one.
SLP used to sell them with a translator box as an addon, one of the guys on
the third-gen F-body list had bought one. They wouldn't flow as well as a
LT1 sensor though, cause of all the crap in the middle... But they were
expensive (memory recalls over $600).
I'd like to get a new MAF in any case, as I've had 2 go bad on my car and I
believe that they are overly sensitive to vibration, where the later ones
aren't so sensitive..
Will use on 89 F-bird, which is going to be D-1 supercharged when I finish
saving for the system... Should be able to swing it by March or so.
Would also like a MAF system on my old Bird also, but the Bosch would
probably max out at about 3000 with a alum headed 455.
Tom
----- Original Message -----
From: Mark Romans <romans at pacbell.net>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Sunday, November 28, 1999 1:07 AM
Subject: Re: 165 to late MAF


> Hey Tom, what's the pn for the 928 maf?  Do you have any measurements?
Like
> ID in inches?
> OD in inches?  What are you going to use it on?
> Thanks.
> Mark
> -----Original Message-----
> From: Thomas Matthews <tmatthew at stny.lrun.com>
> To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
> Date: Saturday, November 27, 1999 7:49 PM
> Subject: Re: 165 to late MAF
>
>
> >Then either the hack is wrong, or it is a unused part of code, or the ECM
> >has its own Voltage to frequency converter.
> >Looked in my service manual for troubleshooting MAF on Chevy- 2.8's are
> >frequency, and you read those with a DVOM that reads freq, or a
tachometer.
> >Bosch hot wire TPI MAF's are voltage output.
> >To further your testing if needed, I have a brand new Bosch 88-89 TPI
MAF,
> >still in the box, with screens and fins still unmolested. Would be happy
to
> >loan it out to you for the winter as it is a spare, as I won't be driving
> my
> >Bird this winter...
> >Tom
> >PS- Glad that you are home- how are you feeling?
> >----- Original Message -----
> >From: Bruce Plecan <nacelp at bright.net>
> >To: <gmecm at efi332.eng.ohio-state.edu>
> >Sent: Saturday, November 27, 1999 8:34 PM
> >Subject: Re: 165 to late MAF
> >
> >
> >>
> >> Going by what I read in the ecmguy's HAC the 165 MAF is Frequency.
> >> Starting at 069A (ref BUA), we have the Ld var for scaling LV8 Scale
> >> Factors,
> >> and just before that we have MAF frquency 34-150 Hz, sounds like
frquency
> >to
> >> me.
> >> Grumpy
> >>
> >> | Waaait a min, how are you getting around that the new GM MAF is
> >frequency,
> >> | and the old is voltage? Build a translator box for freq to volt?
> >> | At least with the Porsche 928 MAF it wouldn't need any translation...
> >> | Maybe one of the code wizards can rewrite the code so it can use a
freq
> >> MAF?
> >> | I'm awaiting this as I want to start modifing my 89 and one of the
> first
> >> | things that I want to upgrade is the entire air inlet tract
(Firebird).
> >> | Tom
> >> |
> >>
> >>
> >
>
>