RE: 2 bar map sensor

[Squash <realsquash@yahoo.com>]

I suppose you signed a non-disclosure agreement for the ECU?

Squash

--- John_Calabrese@ENGELHARD.COM wrote:
> 
> 
> The new LS1 motors MAP sensors are 0-5 volt.  I kow this because when I was at
> school I was team leader for the ethanol vehicle challenge, which converted an
> LS1 to run on E85.  I also built about 5 of these motors, and designed and built
> and installation kit for a vortech s-trim supercharger (have picsif you want to
> see them).  I also know every table and map inside the 1999 truck ECU.  What we
> did was to epoxy a 90 fitting where the MAP sensor was, and run it to an older
> style map sensor.  Then we reprogrammed the map by using a mityvac and writing
> down the volts out @ certain pressure (absolute). Seems to work fine, were
> making 12 lbs of boost, setting no codes, running 5.5 g/s custom siemens
> injectors, and on a 4.8-L, making about 400+ hp.  I also have a complete set of
> shop manuals for the truck (spoils of being team leader).  Let me know if I can
> help with the Ls1.
> 
> 
> 
> 
> 
> 
> "Michael Adams" <michaeladams1@compuserve.com> on 02/04/2000 02:20:47 AM
> 
> Please respond to gmecm@diy-efi.org
> 
> To:   gmecm@diy-efi.org
> cc:    (bcc: John Calabrese/ETG/ENGELHARD)
> Subject:  RE: 2 bar map sensor
> 
> 
> 
> 
> What I would like to do is reprogram the ECM to compensate for the 2 bar
> sensor, and add boost retard for a supercharger.  Is this possible on the
> new ECMs?  I also wasn't sure if the range of voltages produced by the new
> MAP sensors was the same as the old ones. (ie. full scale being say as a
> example 0-5 volts).
> 
> Michael
> 
> 
> >
> > They will sorta work.  But the pcm should set an error code.
> > The program will think the values are way out of line, since
> > it is expecting
> > a 1bar MAP signal.
> > Grumpy
> >
> >
> >
> > > Will the two and three bar sensors work on newer engines,
> > such as the LS1?
> > > I notice those part numbers go back to some pretty old engines.
> > > Thank you.
> > > Michael
> > > > Anyway people are always asking about MAP sensors, part
> > numbers, and
> > > > applications, it's all there now, go to www.diy-efi.org,
> > > > click on GMECM,
> > > > then click on "GM sensors".
> > > > --steve
> >
> >
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> 
> 
> 
> 
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=====
Trains, Trucks, and EFI at http://www.elknet.net/squash
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