Bernd,
Thanks for such a civil post. This is what I wanted to talk about. I'd be
real interested in looking over any data (scan tool or otherwise) that you
might dig up to support the SFT & LFT during open-loop being affected. When
I referred to "snake oil" - I kept mentioning that nobody is able to affect
the A/F during closed-loop operation as this is the fundamental basis of
control systems (combined w/the fact that the narrow-band O2 sensors ONLY
get excited around 14.7:1). Everything that I have ever read or have been
taught would have disagreed w/that.
Now I understand where we were butting heads. You are only talking about
Open-Loop situations. And yes, we have both read that the O2 sensor is
ignored. You might have found/proven that they are indeed not ignored.
Perhaps the table lookup values are used in a formula w/the O2 sensor
reading being a minor "correction". This is very promising for those who
run at WOT or heavy-throttle alot. I do still believe it is useless during
closed-loop (the majority of the time). Wait - that don't add up. This
device wouldn't know the difference from open to closed-loop. Other than
hooking inline to the O2 sensor and replacing the factory sensor - there is
no other changes right? Who is the manufacturer of the sensor? How long
has this product been on the market. Did you say the price would be in the
$300-$400 range? Thanks.
My apologies for getting angry. My situation has changed alot since the
Christmas holidays. I found out my father has ALS (Lou Gherig's Disease)
and will probably be gone in a few short months. My only living grandmother
is on her deathbed, my uncle just got diagnosed w/Cancer, and I lost a first
cousin to a heart attack last Monday. My nerves have been better.
Thanks for the info - hope I get some time to dig into it further.
Respectfully,
Shane
"Bernd D. Ratsch" wrote:
> Shane,
>
> With all due respect, we've talked personally on and off the list (email
> or phone call) and we both have our views and opinions. I hold no
> grudges against you at all...things did get a bit out of hand I do
> admit.
>
> While you may not believe that the HyperSpeed controller works, it does.
> I've got the dyno sheets and track timeslips to prove it. If it were
> only a 2-5HP gain, I would've said the same thing as you, but it gained
> 19RWHP. The A/F mixture was much more "down to earth" at WOT than with
> the "tweaks" and FMU tuning, which also tells me that it's working.
> While yes, the O2's are ignored in Open Loop operation, the Short and
> Long-Term fuel trim is affected by the HyperSpeed (working with the
> PCM's learning capability).
>
> You and I have both done our testing in the past and present and I
> disagree in the point that the Dyno sheets are not "real world"...they
> are and many OBD-II related sites refer to Dyno testing as the basis for
> emissions output testing. I can quote the URL's but won't do any good
> on the forum as it'll turn into a "bitch-fest".
>
> The A/F mixtures can be "adjusted" by other products already on the
> market (to a point) but they work on set parameters that are programmed
> for generic "Performance" scales (Performance Chips are what I'm
> referring to on that statement). The HyperSpeed has the ability to
> adapt. I've got my MT2500 now and am relearning all the new features
> (haven't used one since 1992 - wow...lots of new stuff on it!) and will
> try to print out some of the differences for you (need to figure out the
> plotter).
>
> I've tried the ARC1, PSC1, different MAP sensors, and a few other "tips"
> from other sources in an attempt to get rid of the annoying blower bog
> at 1-2# boost and at part-mid throttle (Open-Loop). None have been able
> to get rid of it...the HyperSpeed did. How...i'm still trying to dig
> deep into the technical reasons but it's the only controller that did
> it...and without any dyno tuning or custom programming. From what I
> understand, it has something to do with the fuel tables...but if it's in
> Open-Loop, theoretically it shouldn't do this...but it did and somehow
> altered the fuel tables in the process.
>
> - Bernd
>
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> [mailto:owner-dakota-truck@buffnet.net] On Behalf Of Shane Moseley
> Sent: Tuesday, January 29, 2002 9:28 PM
> To: dakota-truck@buffnet.net
> Subject: DML: Re: Hyper Speed Controller
>
> No, I was not talking about electronic anything. Tom (Mr. Slick) was
> talking about electronic fuel injection or something like that. I was
> talking about "All closed-loop situations" or systems averaging out to
> be the desired control variable. Get your facts straight. This is
> mostly directed at Mr. Slick. Now he's putting words in my mouth. I've
> quoted the exact post above w/my statements preceded by >> and Tom's
> with >. Go back and read....oh wait...thats futile.
>
> How 'bout we talk some about the HyperSpeed controller and its ability
> (or
> inability) to control A/F ratio? Especially since that was my initial
> goal. You guys degraded the conversation into what we have now. Mr.
> Slick jerked my chain and now he's feeling the wrath. I meant no harm
> to you - just kinda ticked that a previous situation is starting up all
> over again. Personal attacks and dodging the real issue.
>
> Latr,
>
> Shane
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 12:03:53 EDT