Jet Performance scam?

[Walter Sherwin]

Almost as pathetic as Hypertech!  Once upon a time, I purchased one of their
MEMCAL's for a 91-93 454SS truck (P/N 121-112).  Guess what, the only change
in the cal was 1 extra degree of spark advance at the upper ends of the
spark tables.  And!!!!!,  they had the gall to further say that their chip
had to be run with a 160 F stat and a different aux cooling fan switch in
the cylinder head.   Sure renewed my faith in the DIY-EFI
approach..........


Walt.



----- Original Message -----
From: "Shannen Durphey" <shannen at grolen.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, September 27, 2000 10:57 PM
Subject: Re: Jet Performance scam?


> Did they at least put a cool picture of a "before" and "after" graph
> on the box?  That's where the cost is, in the documentation!
> Shannen
>
> TK wrote:
> >
> > Nooooooooo! That seems so impossible!
> >
> > The least they could have done was make a bunch of changes in the tables
> > at -40 to +8F and in areas of the spark table that are rarely used like
> > H........
> >
> > Terry
> >
> > ----- Original Message -----
> > From: Reid Bishop <rbish at ibm.net>
> > To: <gmecm at diy-efi.org>
> > Sent: Wednesday, September 27, 2000 6:52 PM
> > Subject: Jet Performance scam?
> >
> > > I recently got a buddy interested in performance tuning GM engines.
He
> > has
> > > a 92 Isuzu Rodeo, with a GM 3.1 V6.  It uses a 1228838 ECU, and has
the
> > ANFK
> > > calibration.
> > >
> > > Back in '94, he had bought a 'performance' chip from Jet Performance
> > > Products.  Today, we read his original EPROM, and found that the
> > > 'performance' EPROM had the SAME IDENTICAL IMAGE on it as was on the
> > > original factory chip!
> > >
> > > What gives?  Did Jet somehow 'hide' their calibration (I don't see how
> > this
> > > is possible on a 2732 EPROM), or did they just plain scam him for
$120?
> > > BTW- he did not receive a CALPAK- this is not a removeable chip on the
> > ISUZU
> > > '8838.


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