Mike,
All of my work is on a dyno, we measure fuel, ignition, monitor the
outputs of all sensors
(O2, throttle position, egt, etc, etc, etc), we log all inputs and
transfer to a PC for analysis,
we even plot BSFC (Brake Specific Fuel Consumption), on a lot of the
pulls. I am really
pleased with the results I have seen from the Jet chips (I & II), given
the fact that we must
work with these "black boxes). You must have a faulty chip. I'd really
be interested in what
they tell you the problem is, so keep me informed.
> -----Original Message-----
> From: Mike Catlin [SMTP:Catlin@erols.com]
> Sent: Monday, August 10, 1998 5:01 AM
> To: dakota-truck@buffnet.net
> Subject: DML: Re: Dyno Results on the R/T with Jet Chip
>
> >Frank wrote:
> >I just read your post on the Jet chip & I am really confused on the
> >numbers. A couple of questions and suggestions for you because even
> >with the Stage I chip you should see better results.
>
> >1) Are you running a Stage I or a Stage II chip, with the TB Mods
> > you should be running a stage II.
>
> I was running the stage II chip.
>
> >2) Were you running premium grade fuel, both chips are sensative
> > to fuel (advanced timing).
>
> I have run premium in it since the day I got it.
>
> >3) What were the torque and horsepower figures from 2,000 RPM and
> > up (hopefully they gave you the plots so you can compare them).
>
> They have to start from 3,000 RPM since the trans kicks down out of
> 3rd gear on the dyno when you do full throttle any lower than
> 3,000 RPM.
>
> >4) Were the torque and horsepower numbers (raw numbers), or were
> > they adjusted to standard temp, barometric pressure and humidity.
> > I know this might be a stretch, given the pulls were so close
> > together but it still might explain the low numbers on the Jet.
>
> Raw numbers no adjustments. As far as low numbers for Jet the 2 pulls
> were done in identical conditions about 5 minutes apart so the jet
> chip still had lower HP numbers even though I did the first pulls with
> the Jet chip on a cooler engine. The guys at the dyno said my first
> pull numbers should of been higher since the engine was cooler.
>
> >5) Did the torque and horsepower peeks change in RPM between the
> > pulls with and without the chip. If they didn't change the
> > chip might be faulty.
>
> No real change.
>
> >6) Did they give you ignition plots from the pulls, (you should see
> > a more aggressive ignition curve with the Jet chip). If you don't
> > see a difference in the ignition curve, send the chip back
> > to Jet for replacement.
>
> No, and Yes I am sending it back. I will be calling Jet this morning
> to find out what the deal with this chip is. I may be willing to try
> a replacement chip if they say this one is faulty. I will be asking
> to
> see their dyno printout on the chip since they told me in an E-Mail
> that I should expect to see a 20-22 HP increase not a HP loss.
>
> >I have seen an increase in both torque and horsepower from approx.
> >2,000 and up generally in the range of 10-20 horsepower and 15 ft/lbs
> >torque.
>
> Was this on a dyno or G-tec? If so maybe I do have a bad chip. I can
> tell you one thing I have for sure right now is a bad attitude. This
> is beginning to feel like my $700 ignition fiasco. I'll post to the
> list what Jet chip has to say after I contact them this morning.
>
> Mike (My blood pressure is rising) Catlin
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