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Tech Forum : 2.5 Engine management log

- BMW E21 Community
   - Tech Forum
      - 2.5 Engine management log
Himizoli   Posted Wednesday, Jan 3rd 10:22am [Edit] [Quote] [IMS] [View car]
Junior Member
Post nr. 4

Hungary
320
We wired up my 2.5 e21.(Motronic 1.3)
1. figure RPM - MAP - DWELL
2. Figure RPM - MAP - IGNINTION TIMING



Marquis_Rex   Posted Friday, Jan 5th 2:25pm [Edit] [Quote] [IMS] [View car]
Member
Post nr. 504
   
UK
BMW 323i 2.7-as featured in Total BMW Nov 2002,Porsche 911/993TT
Thank you very much, that's very very useful to me!
I've been looking for these kind of stock ignition values throughout the engine speed/load range for ages. I have alot of values for more modern 24 valve engines such as the 328i M52 etc etc.
Which spec M20 do you have?
An early 9.7:1 CR a 9.4:1 CR or a later 8.8:1 CR?

I'm thinking of buying a system to generate similar maps for my Porsche 993

Himizoli   Posted Saturday, Jan 6th 10:09pm [Edit] [Quote] [IMS] [View car]
Junior Member
Post nr. 6

Hungary
320
It is a late M20B25 with 8.8:1 CR

If you need a tables (load/Map/ignition, and load/Map/injection) I can send you by email.

I am interested in how the M52 looks or M54.
Can you send it to me ?
My email himizoli@freemail.hu


Marquis_Rex   Posted Monday, Jan 8th 11:03am [Edit] [Quote] [IMS] [View car]
Member
Post nr. 505
   
UK
BMW 323i 2.7-as featured in Total BMW Nov 2002,Porsche 911/993TT
Please check your email!
I've sent maps for the 328i (single intake VANOS version) and 330i M54.
The maps are from measured dyno data rather than from vehicle and are mapped to BMEP vs engine speed, but I've also included a data set with manifold pressure data in BMEP (effective mitteldruck) vs rpm but measured in mbar rather than KPa.

Please send me the M20 data in tabulated form to the email address I used to send you my stuff!!
Just visually scanning your maps confirms alot of theories I had about the M20s combustion system and losses across the Motronic Air flow sensor!

Himizoli   Posted Monday, Jan 8th 10:57pm [Edit] [Quote] [IMS] [View car]
Junior Member
Post nr. 7

Hungary
320
Thanks for the maps.
It is really usefull for my building my M54b30 in my e21

I sent you the M20 maps.


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