AO

Yes I am. It makes all the difference in the world. As soon as you hit boost, it goes into the WOT map and richens the mixture. There's no tip in or waiting for the LH the 'catch up." It should also allow for a little more aggressive timing if there is knocking caused by lack of fuel.

BTW, I just realized my previous post neglects to say dropping into the 12's under boost is a very good thing!

jcorenman

Dan, I though about that in the early days of my SharkPlotter project. The problems with that approach are that the averaging time isn't very long, and it is not accessible (except for the current cell). But with those aside I still don't like the idea of updating the maps without being able to see the effects. Logging the data, taking it to SP and being able to apply some smarter algorithms seemed to make more sense. SP looks at the number of data points for each cell, and also considers the effect of interpolation. Ignoring that would lead to a very "lumpy" map, not a big deal for the adaptation table because it is continuously being updated. But memorializing the lumps in the map didn't seem like such a hot idea.

John Speake

Agreed Jim.

BTW everyone, there is a new ST2 software Ver 6.0.6 release being field tested which sorts out the difference between LH and EZK Tenp 2 readings and also allows 4 x the size of datalogs to be run.

John Speake

Ok, that's good...... I don't see it listed on DR's website ?

AO

dprantl

Another question: why in the Ignition System Monitor tab in the ST app are the two air temp values always blank? At first I thought it was just my car, but all the screenshots of that tab in the ST2 manual are the same way.

Dan
'91 928GT S/C 475hp/460lb.ft

John Speake

I should have mentioned in the User Manual that this is an Airtemp indicator is for LH2.2 only....... the sensor in the base of the engine airfilter box.

John Veninger

Does anyone know if the LH and EZK bin files that come with the ST2 to load the PEM's will pass emission inspections?

John,
It would be nice to have a "stock" set of maps to down load for emission inspections. Much easier than pulling the computers and swapping chips every couple of years.

When you do update the ST2 software, can you make the start logging button bigger and have a "check all" button for logged items?

dprantl

You could just load the default maps and set your injector size. Assuming you still have an O2 sensor and are running closed-loop, I don't see why you wouldn't pass. Even if the maps were off, the O2 loop would take care of it up to +/- 20%, and that's without adaptation.

Dan
'91 928GT S/C 475hp/460lb.ft

John Veninger

The default maps are not really stock maps.
The O2 loop is holding it at around 13.5-13.8

dprantl

13.x at idle/cruise? What is the O2 compensation % on the fuel parameters screen? Unless the compensation is maxed out at -20%, you are either around 14.7 and your WBO2 is reading incorrectly too low (or the programmed WBO2 law is off), or there is a problem with your O2 sensor/LH.

Dan
'91 928GT S/C 475hp/460lb.ft

John Speake

Hi John,
The default maps are stock maps, copied from the stock EPROMS. As Dan says, if you are running closed loop, then you should have no problem at all with emmissions.

O2 loop % will not always be at zero, because of adaptation. But of copurse at idle cruise, A?F should be 14.7:1

Have added you suggestions to the list :-)

John Veninger

I just put back the stock chips. Will monitor the AF when I take it out in the next few days.

The cruise and idle were staying in the 13's with a dip into the 12's with WOT and high RPMs.
I saw compensations from 2% up to 18%.

I won't be able to do anymore monitoring with the ST2 until the spring

John,
Based on my "seat of the pants" the car drove different with the PEM and your files vs. the stock chips.
Are the adaptation parameters different with your software or does it always target 14.7 in closed loop?

John Speake

Was this a stock GT you were using for this ? If not, what is engine spec of car used ?

Clearly the A/F ratio is way out at cruise and idle, if it is running closed loop ?

There's nothing diiferent from stock chips in the ST bin files. Adaptation values do vary from car to car.

John Veninger

Stock except for an X-pipe.

I added the cats back on for inspection and it still runs the same.

I did notice when using the non-cat, no sensor maps it was running leaner. Would see some 15's.

Would the PEM adapt differently than the stock chips? I can tell you the car runs different with the PEM vs. the stock chips. Even the first day I installed them and ran the car. I mean a good different.

I'll see what my AF look like with the GT configured 100% stock except for the wideband.