Mike,
SuperChips did the custom chip for my supercharged 95. They were very
helpful and supportive. Last time I talked to them, it didn't seem that
interested in
exploring the OBDII Dodge world. If they change, please let me know. In
regards to the JET chip not being that aggressive, I agree but lives out
here in Calif
where we are faced with the CARB dictators. CARB even requires that all 99's
have their programming encrypted to keep us out of them (no more fuel and
ignition map modifications). The only aftermarket avenue left is the
intercept chip like JET. It will be interesting to see how Mopar Performance
handles their high
performance modules (stored within the ECM is the VIN and a lot of other
data about the condition of the vehicle). I bet the MP ECM will only be a
dealer
replaceable item.....
Frank
> -----Original Message-----
> From: mbm [SMTP:mbm@totcon.com]
> Sent: Tuesday, September 01, 1998 11:15 AM
> To: dakota-truck@buffnet.net
> Subject: DML: TB/ECM Misc.
>
> Frank,
>
> >You are right in that at WOT the fuel and ignition settings come from
> tables
> >within the ECM (Open Loop). At WOT the mixture is rich for two reasons,
> to
> >keep
> >the Cat cool, and for power, emissions regs. are a lot more lenient at
> WOT.
> >Additionally there are adaptive cells in the ECM to take up production
> >tolerances
> >between engines. What I want to do is push the mods right up to the point
> >where the computer can't adjust (lean condition). If we still have room
> for
> >improvement,
> >then we can go to someone like JET for a custom chip that will richen the
> >fuel. The computer actually looks at the O2 sensor(s) up to approx. 7/8
> >throttle settings,
> >most of the throttle settings will not be a problem.
>
> Awesome job on the TB's!!! Count me in on the deal.
>
> To really see what's happening with the ECM you'll need a
> scan tool or a PC w/scanning software. There are a few OBDII
> products that will scan CC vehicles. OBDTool offered by
> CarComp http://www.carcomp.com comes to mind.
> AutoXray makes a hand held unit but doesn't have an
> OBDII compliant product yet, it's still in development.
>
> I use an AutoXray scan tool on my '95 Impala SS (OBDI)
> and it works great. You can really analyze what happens
> when you make a component change. You would also
> be able to possibly detect potential problems.
>
> As for the ECM, the adaptive cells that you mentioned (PID loop(s))
> are very forgiving for most changes. Since our system is speed
> density, the ECM relies mainly on manifold pressure (MAP) and the
> TPS to determine engine load/air volume. Making changes
> to the TB, or, specifically, increasing airflow shouldn't be much
> of a problem for the ECM. Keep in mind that the ECM is also
> designed to handle such conditions as, a severely clogged
> air filter, clogged fuel filter, etc.which forces the ECM to make
> the corresponding corrections to the A/F, timing etc. for these
> conditions.
> What we will REALLY need is decent ECM tuning. Personally,
> I feel something a little_stronger than a JET product is required.
> I'm currently trying to get SuperChips in Orlando to develop
> code for the late model 96-99 Dakota's/Durango's but they
> are kinda backlogged at the moment. I have offered my Durango
> as a test mule to use on their dyno.
> I have worked with them in the past with my Impala, so we'll see
> what happens. They offer chips for earlier Dakota's so, someone
> may want to give 'em a jingle.
>
> Mike Marx
> '98 Durango
>
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