Again, all factory vehicles do indeed run at 14.7:1. This is a federal
mandate. The narrow-band O2 sensors ONLY function is to indicate leaner or
richer than the desired 14.7 to 1 ratio. Buy an A/F gauge and you can watch
it visually. Catalytic converter functionality would be severely degraded
if this were not the case. In fact, it would melt down also at least on the
rich side of stoich.
At WOT, mine runs between 12.0-12.7 per the factory calibration. This was
verified w/a wide-band O2 sensor.
Not doubting your results - just stating fact. Maybe its your test
equipment - what you using? If dyno - whats their equipment? How old are
their wide-band sensors? Have them do a free-air, or immerse in a stream of
known gas like propane.
Latr,
Shane
"Bernd D. Ratsch" wrote:
> Actually Shane, the trucks I've tested don't run at 14.7:1...they run at
> 15.1-15.3:1. Under WOT, it's not 12.5:1 either...more at 13.2-13.4:1.
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@BUFFNET.NET
> [mailto:owner-dakota-truck@BUFFNET.NET] On Behalf Of Shane Moseley
> Sent: Sunday, January 27, 2002 9:46 PM
> To: dakota-truck@BUFFNET.NET
> Subject: DML: Re: Hyper Speed Controller
>
> One thing I don't understand - 14.7:1 under normal cruise is what every
> factory vehicle's PCM is doing already. How is the HyperSpeed
> controller supposed to help? Furthermore, the factory tunes WOT to be
> around 12.5:1 and is non-adjustable especially since the PCM is ignoring
> the O2 sensor while in that mode of operation (WOT).
>
> Sounds like snake oil to me.
>
> Bernd, your own track results show a slower ET w/the HyperSpeed
> controller in your before/after comparisons.
>
> Track Times:
>
> Before: 14.55 @ 96.01mph
> After: 14.65 @ 97.02mph
>
> What gives?
>
> Latr,
>
> Shane
>
> "Bernd D. Ratsch" wrote:
>
> > Actually, it's for just about any vehicle with an O2 sensor (or two).
> >
> > It monitors the O2 signal (we'll use A/F for ease of understanding)
> > and corrects it to 14.7:1 under normal cruise and 12.0:1 under WOT
> > (WOT is adjustable +/-1.0).
> >
> > Again, the final product will be ready in 90 days (this is the one
> > with the USB port).
> >
> > - Bernd
> >
> > -----Original Message-----
> > From: owner-dakota-truck@BUFFNET.NET
> > [mailto:owner-dakota-truck@BUFFNET.NET] On Behalf Of Tim Althoff
> > Sent: Wednesday, January 23, 2002 10:01 PM
> > To: dakota-truck@BUFFNET.NET
> > Subject: DML: RE: Hyper Speed Controller - Working and noticeably
> > better already
> >
> > ok bernd...I need to take out a little stress (I am supposed to have
> > my Computer science program done by Friday at 5pm and have almost
> > nothing...I NEED TO BUY SOME NEW TOYS!!!
> >
> > is this for highly modded or could I get some results from my lightly
> > modded 3.9. (cold air, TB, ignition, exhaust, 180*, modified intake,
> > locker...soon to be 3.90 gears, elec fan, pulley. How do you adjust
> > it? I know laptop but how adjustable is it?
> >
> > most importantly what cost going to look like? thanks
> >
> > Tim Althoff
> > 99 RC Dak w/ V6 5-speed
> > http://go.to/yllwdkta
> >
> > -----Original Message-----
> > From: owner-dakota-truck@BUFFNET.NET
> > [mailto:owner-dakota-truck@BUFFNET.NET]On Behalf Of Bernd D. Ratsch
> > Sent: Wednesday, January 23, 2002 4:26 PM
> > To: Dakotart@yahoogroups.com
> > Subject: DML: HyperSpeed Controller - Working and noticeably better
> > already
> >
> > Yup...the HyperSpeed Controller (Proto-Type Rev-II) is installed and
> > functioning as claimed. Much better throttle response, no overly rich
>
> > (or lean) smell from the tailpipe (home-brew A/F meter...aka: nose),
> > and the kicker is the lean spot caused by the supercharger at 1-2#
> > boost under 1/2-3/4 throttle...it's not there anymore.
> >
> > It took about 50 miles for the PCM to relearn the new (corrected)
> > settings from the HyperSpeed controller (reset the PCM after the
> > initial
> > installation) and adjusted the high-end enrichment a little bit (will
> > need to put back to normal in about 50 more miles or so).
> >
> > The final box will be released in 90 days with a USB port, completely
> > sealed box (for under the hood installation), and software for your
> > laptop. This will allow the end user to fine-tune the fuel curve
> > (across the RPM band in small increment as well)...this means
> > programmable and automatic. Yes..you can adjust on the fly (while
> > driving).
> >
> > I put some pictures of the Proto-Type installation on the SpeedTweaks
> > website (Engine Controls/HyperSpeed) but keep in mind that the final
> > controller will be Plug and Play with your factory O2 sensor(s).
> > Yes...it replaces your stock (forward) O2 sensor(s). With all this
> > said, it's also 100% SMOG LEGAL (CARB EO#).
> >
> > I'll be heading to the Dyno shop this Friday to get some HP and TQ
> > readings, but the butt-dyno already noticed the change...nothing else
> > was installed in the mean time.
> >
> > - Bernd
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:03:52 EDT