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HotCat's Citroen ZX TU5JP/K engine is running (18th) 
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HotCat wrote:
I've already use sendspace to share my video, the the video was badly taken, I must reproduce it on daylight

First things first, I don't care how crappy it is, it's the original, please share it with me, even if only me. The new vid will be new, not original, and no matter how clear, somehow not as good.

New post in a second.

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Wed Jan 30, 2013 11:33 pm
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HotCat wrote:
the engine can not output enough power when the RPM is above 1600, the stock ECU ignore the 24x crank input but calculate the engine RPM by 3x output from ignition module. I think this is the performance bottle-neck. What's your opinion?

No, almost certainly not. The bottle neck will be one of these things:

  • too rich
  • too lean
  • too retarded

Out of date calculations can result in those things, but usually not. Once per engine firing event is optimal. FreeEMS currently does it much more, which is bad, not good. I'll fix it to do it that often and no more, eventually.

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Wed Jan 30, 2013 11:35 pm
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Also, it could just be "american engine" syndrome :-)

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Wed Jan 30, 2013 11:36 pm
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Fred wrote:
No, almost certainly not. The bottle neck will be one of these things:

  • too rich
  • too lean
  • too retarded

Out of date calculations can result in those things, but usually not. Once per engine firing event is optimal. FreeEMS currently does it much more, which is bad, not good. I'll fix it to do it that often and no more, eventually.


I would say it was the retarded timing, my GM 3.1L v6 needed more advance to be happy in the range HotCat is referring to. It might be running rich as well, but we would need to see what the wide band O2 sensor readings are during a "normal" and a "spirited" drive to see if that was the case. I will do more research once I'm back at home to find out more about his 3.0L engine.

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FreeEMS vehicle #16, 1996 Chevrolet S10 2.2L SFI I4 with DIS ignition
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Thu Jan 31, 2013 12:16 am
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Fred wrote:
HotCat wrote:
I've already use sendspace to share my video, the the video was badly taken, I must reproduce it on daylight

First things first, I don't care how crappy it is, it's the original, please share it with me, even if only me. The new vid will be new, not original, and no matter how clear, somehow not as good.


I've already post the orginal video download link, hope you can download it


Thu Jan 31, 2013 5:57 am
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DeuceEFI wrote:
I would say it was the retarded timing, my GM 3.1L v6 needed more advance to be happy in the range HotCat is referring to. It might be running rich as well, but we would need to see what the wide band O2 sensor readings are during a "normal" and a "spirited" drive to see if that was the case. I will do more research once I'm back at home to find out more about his 3.0L engine.


I think the stock ECU deliberates retarted timing to improve the shift quality of Automatic Transaxle (4T65-E), did you use 4T65-E as your transaxle?


Thu Jan 31, 2013 6:10 am
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HotCat wrote:
Fred wrote:
Re video, we need to get you some server/upload space so we can youtube it for you!


I've already use sendspace to share my video, the the video was badly taken, I must reproduce it on daylight

You should have made it more obvious! :-)

I've now shared it a bit more widely! ;-)

http://youtu.be/JNwTxi5jaNQ

_________________
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!


Thu Jan 31, 2013 8:37 am
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TO220 - Visibile

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This is cool as hell. Is this the first diy hardware that could pass for a commercial product?


Edit: and your desk lamp is pretty cool too.
Image


Sun Feb 03, 2013 3:29 am
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asx wrote:
This is cool as hell. Is this the first diy hardware that could pass for a commercial product?

Yes, in fact this is my first experience designing PCB and work close to Fred to make sure it was compatible with FreeEMS


Sun Feb 03, 2013 8:48 am
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LQFP112 - Up with the play
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My Citroen ZX was hit by a newbie driving a Palio, the ground was very slip that day. I can't produce any video until I fix it up
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Sun Feb 03, 2013 8:54 am
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