PorKen

Simple definitions for viewing and modifying stock 16V and 32V EPROMs using TunerPro.


For '87-'95 LH2.3 EZK, see this thread - LH23 EZK XDF TP5


As most folks will likely be using these along with a ST1, some handy ST data is exposed for convenience, rev limit, O2 sensor disable, etc.

Additionally, there are functions not available in the ST1 software, EG. disabling WOT maps, injector cutoff, idle speed, and the ability to view/rotate 3D graphs of multidimensional maps.


WYSIWYG, YGWYPF, YRMV, DIY, IE. no support for these. (Cryptic notes appear briefly when you you hover over an item.) PMs/emails asking how to install, etc., will be ignored/deleted.


TunerPro 5.0
download page

XDFs - (right click, save as...)
928_LH22_EZF_XDF.zip

BINs - (right click, save as...)
LH22_EZF.zip

PorKen

TP5 Notes

- View By: [Parameter Ordered List]

- hold CTRL key and move mouse to rotate 3D graph

- although 16V LH and EZ bins are included in the zip file, only EZ418 is editable, LH527 is only fully editable using the 16V XDF


LH/EZ Notes

- the LH2.2 base map is 10-bit, 0-1023, split into 8 and 2 bit tables

- the AutoThority/eBay chipset is based on LH721 and EZ428 EPROMs

- a well tuned S3 flows ~400 g/sec at max HP, at SAE air temps (red axis below)

- the stock EZF EPROM is a 2716 = 2K bytes, a 2732 will work, but only the first 2K is accessed

- injector cutoff disable is coded externally by grounding pin #15 on the LH ECU plug (for auto trans)


ST Notes

- the LH2.2 base map is 10-bit, but values are shown as -512 to 511.


XDF Notes

- MAF and MAP scales are calculated and displayed automatically for stock or with ST files

PorKen

'85 vs. '86.5 vs. AT/eBay base maps

jbrob007

I'm glad you know what all this GREEK means... I'm just happy to reap the benefits!!!

PorKen

Joel - these are a small subset of the files I used to make the S300s chipset, and don't include all of the new (assembly language) coding which make the S300s so super schweet.

danglerb

When do we see some Euro S2 chips?

The recoding is the main thing holding me back from the new Sharktuner, I think its essential for max gains.

Mike Frye

Ken,

Very cool stuff.

I see that you have a map for '85 vs. '86.5. Was there a difference in the stock mapping? I thought the only differences were hardware.

Dude, you knew Ken was working with US S3s, what were you thinking getting a Euro S2?

also as a side note: 'Max Gains and the Sharktuners' would be a cool name for a rock band.

Darklands

If Ken makes vacation in Europe I have here a Euro S 2 with a new build engine.
The engine has 8000 km after the rebuild driven and is ready for his magic! ;-)

Glen McCartney

Ken, good stuff as usual.

I'm having trouble downloading the XDF files, anyone else?

PorKen

Mike - what Karsten said.

I may be able to get my hands on an auto in the PacNW, but I need a manual, first. Both need to have a knock sensor installed.


Mike - all three versions of the 32V chips have trivial changes to the O2 sensor loop pattern(s), but the '86.5 chip, which came on the yellow motherboard, has the additional fueling in the base. I assume to go along with the larger, true dual exhaust.

Some might cynically say that '86.5s need more power, as they are heavier, but that's another story.

FWIW, the eBay/AT LH chip is a clunky 'tune' of the 721, in the (8-bit) base map only - pic added above - with no other changes, rev limit same etc.


Glen - zipped for IE users

danglerb

What about doing the tuning remotely for the S2? As long as the test car has access to a SharkTuner couldn't files just be emailed back and forth?

What happened to the car Mark was buying? or did the seller totally poop out?

PorKen

I suppose, but I don't have/use a ST. (Which is why it has taken me 3 years to 'finish'.) If you have a SharkTuner, you can make one yourself...in theory. Going to 55psi should wake up the S2 nicely.

I kept meaning to go check out where that ROW 16V was parked, but have never made it out there.

PorKen

I have a partially finished XDF for the LH527 16V chip. It is similar to the LH590, but code and data are in different places, and a lot of it is bypassed, but left in place. (Idle control, O2 loop, etc.) It's kind of a mess. The base map, and some other maps can be viewed with the 32V XDF, though.

When it's done (someday), I'll include that, too.

16V base map

PorKen

Looking again at the base maps above...remind me why I'd want a S2 instead of a S3(.5)?


Interest how similar the maps are at 500-660 rpm, and up to 2000 rpm above 400 grams/second (which is about the limit for a well tuned NA S3, from what I've seen, maybe 420 in cold air). Almost looks like the 16V map was used as the starting point for the 32V (or some other generic map was used for both).

RFJ

I have a chip for an s-2 from John Speake ,i have not installed it yet,when i do i will put a adjustable fuel regulator on. I am kind of waiting till i get my 86.5 together and with Kens chip. I expect the 86.5 to do better but the 85 euro winds up preatty good foe a stock 16 valve of 4.7 l from 1985.Cheers ,Ray