Plug-in LH Replacement
#16
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Hmm, sorry that connector is different than mine, mine is the 35 pin shown at http://www.electronikrepair.com/wst_page7.html
I have a source for new blank connectors, just need to find the board side.
#17
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#18
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Can this new brain work with a MAP sensor instead of a MAF???
#21
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Interesting, but redundant. Why not just use a Megasquirt III and spend your efforts on the harness adapter and the tuning? I'm not trying to be a downer, it's cool that you are trying to do this, but I just see it as unecessary.
#22
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Can this new brain work with a MAP sensor instead of a MAF???
If you could make this a "one size fits all" base version that would apply to all years and be programmable then you would sell a ****load.
Interesting, but redundant. Why not just use a Megasquirt III and spend your efforts on the harness adapter and the tuning? I'm not trying to be a downer, it's cool that you are trying to do this, but I just see it as unecessary.
Reason 2: Megasquirt will work out more expensive (I did consider it)
Reason 3: Because I can
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Later I will post the schematics and hopefully have time to post pictures also.
One thing that I want to ask some electronic savvy people here, and that will make my life a lot easier. I need a shot of an oscilloscope with the EZK Pulses on one channel and the Injector output on the second channel. I am specifically looking for the timing of the injectors relative to the EZK pulses. Preferably at idle-ish (1000-1500rpm) and if possible a second shot at higher rpm (2500-3000). Of course shots from a working s4
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19?? VW Baja Bug (Completely custom, Golf 1.8 motor, and many, many mods) - Currently my daily drive
1988 Porsche 928 S4 Euro/ROW (Black with Ivory interior) - Under ECU surgery
1982 Porsche 924 Euro (Silver with cream interior)- Gone
1982 Porsche 928 S (Manual) Euro (Petrol Blue with Blue with black and white chequered interior) - Gone
1983 Porsche 928 S (Auto, NA spec, Red, black interior) - Gone
1994 BMW 530i Manual (Maroon, grey interior) - Gone
Last edited by Volla; 11-17-2010 at 05:22 PM.
#25
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I like Step 1-6! ![rockon](https://rennlist.com/forums/graemlins/rockon.gif)
Pinouts for both the LH and EZK can be found on the link in my signature. Very interesting. I'm pretty sure you cost estimates are way low, but even at $500US, it might be worth it.
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Pinouts for both the LH and EZK can be found on the link in my signature. Very interesting. I'm pretty sure you cost estimates are way low, but even at $500US, it might be worth it.
#26
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Another potentially interesting aspect. I am not satisfied with the CIS on my OB and would like to move forward. I would lean towards MS3, however I would like to end with the same thing on my S4 and my OB, so I can use the same tools and such on both. So that leads me towards trying to put LH/EZK on my OB, so I could sharktune both. Which is a pretty expensive proposition. This might be a path for something that could be backfitted onto OBs, particularly if it could be set up for MAP. On the other hand, I think this is a pretty big project, and could easily be years in the works.
I may be able to help out a bit. I am EE and have access to all sort of test equiptment. On the other hand I am new to the LH and EZK and have very little available time.
I may be able to help out a bit. I am EE and have access to all sort of test equiptment. On the other hand I am new to the LH and EZK and have very little available time.
#28
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Nice project! I have thought about doing the same on and off years ago but just did not have the time.
Are you planning to also make a replacement for the EZK brain, or is this just for the LH 2.3? It really would be nice to be able to use either a MAF or MAP input.
Dan
'91 928GT S/C
475hp/460lb.ft
Are you planning to also make a replacement for the EZK brain, or is this just for the LH 2.3? It really would be nice to be able to use either a MAF or MAP input.
Dan
'91 928GT S/C
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#29
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I'm pretty sure you cost estimates are way low, but even at $500US, it might be worth it.
, I think this is a pretty big project, and could easily be years in the works.
I may be able to help out a bit. I am EE and have access to all sort of test equiptment.
Step 1, (7): Inter-operate with all major diagnostic test and tuning equipment (SharkTuner, Spanner, DT999/PDT999/DT928, etc.)
Are you planning to also make a replacement for the EZK brain, or is this just for the LH 2.3?
But ok, on to step 3
Step 3: Schematics
Here are low resolution pic of my schematics, I made it low res on purpose, I don't want other people stealing my design and making money out of it.
First Image is page 1-4 of the schematics, second image is page 5-8.
Page 1: CPU
Page 2: EEPROM
Page 3: Power
Page 4: Outputs
Page 5: Digital Inputs
Page 6: Analogue Inputs
Page 7: LEDs, USB and Serial
Page 8: Connector
The third image is the PCB layout, blue is bottom layer, red is top. This board is made using only 2 layers. Most probably if I make second version I will have to go 4 layers to make enough space to route for different connectors.
Next step is making the actual PCB, populating and soldering
==================================================
19?? VW Baja Bug (Completely custom, Golf 1.8 motor, and many, many mods) - Currently my daily drive
1988 Porsche 928 S4 Euro/ROW (Black with Ivory interior) - Under ECU surgery
1982 Porsche 924 Euro (Silver with cream interior)- Gone
1982 Porsche 928 S (Manual) Euro (Petrol Blue with Blue with black and white chequered interior) - Gone
1983 Porsche 928 S (Auto, NA spec, Red, black interior) - Gone
1994 BMW 530i Manual (Maroon, grey interior) - Gone