The other two chips in the MEMCAL (was Re: More Horsepower. More Torque!!)

[Marc Randolph]

I've seen multiple references, one of which I consider a very reliable
source, that all say the white circuit board in the MEMCAL is part of
the ESC system.  Supposedly eariler models (about 90 and before?) have
this ESC component outside the MEMCAL in a small black box a bit smaller
than your palm.

Are the resistor packs maybe part of the fuel-backup or limp-home mode?
If so, has anyone tried removing them to see if the car still runs
right?  Obviously I wouldn't want to do this permanently, but while
tuning on a car, it would be nice not to have to worry about the resistors
being there.  Of course, that still leaves the ESC part of the MEMCAL.

   Marc

On Wed, Mar 31, 1999 at 03:41:53PM -0800, Terry/Carol Kelley wrote:
> Correct me if I am wrong, but what some people are calling the ESC is the
> fuel backup module (over the resistor packs although I think there might be
> more to them than resistors.)
> 
> Terry Kelley
> 
> 1986 Olds Ciera GT 3800 Supercharged
> -----Original Message-----
> From: Marc Randolph <mrand at pobox.com>
> To: gmecm at esl.eng.ohio-state.edu <gmecm at esl.eng.ohio-state.edu>
> Date: Wednesday, March 31, 1999 3:20 PM
> Subject: The other two chips in the MEMCAL (was Re: More Horsepower. More
> Torque!!)
> 
> 
> >On Wed, Mar 31, 1999 at 10:07:28AM -0500, David A. Cooley wrote:
> >> >Sorry, I should have stated more properly that if you remove the cats,
> >> >you aren't street legal.  When I said that, I had in mind the ZR-1,
> >> >where the cats are attached to the exhaust manifolds, so going to
> headers
> >> >would mean no cats (unless you pay even more for headers with cats).
> >>
> >> Ah..
> >> Wasn't aware the ZR1 had the cats as part of the manifolds... Makes sense
> >> though with the limited room under a vette.
> >> Can they be removed at all from the manifolds?
> >> If so, sending the manifolds to be extrude honed might be worth a few HP.
> >
> >Unfortunately, they can not be easily removed... I suppose you could
> >saw them off and weld them back on, but I'm not sure enough HP would
> >be gained to be worth the effort.
> >
> >Back to ECM related issues - I've looked through the archives and
> >it appears that everyone decided that the two chips in the MEMCAL
> >(the two small chips under the ESC unit) are resistor packs.  Was this
> >ever confirmed?  Also, does the ESC part of the MEMCAL put out a
> >digital or analog signal to the ECM?
> >
> >The reasons for these questions is this type of thing could influence
> >how far away from the ECM I'd be willing to relocate the MEMCAL
> >(ie, closer to an emulator).
> >
> >Thanks!
> >
> >   Marc
> >
> >--
> >  Marc Randolph     -    mrand at pobox.com    -     PGP keyID: 0x4C95994D
> >   "During my service in the U.S. Congress, I took the initiative in
> >    creating the Internet."   - US vice Pres. Al Gore in an Mar 9, 1999
> >              interview on CNN somehow claiming he created the Internet
> >
> >
> 

-- 
  Marc Randolph     -    mrand at pobox.com    -     PGP keyID: 0x4C95994D
   "During my service in the U.S. Congress, I took the initiative in
    creating the Internet."   - US vice Pres. Al Gore in an Mar 9, 1999
              interview on CNN somehow claiming he created the Internet