Hey everyone. I finally have my wiring complete, base settings into tunerstudio, and hopefully will be able to get my car started tonight. I understanding tuning the fueling table currently, but don't really know where to start with the ignition timing. I know for sure I want a very conservative setup initially. I have been searching, but I haven't seen anything I trust using so far.
The motor is an m52b28 running MS3x with fully sequential fuel injection and coil on plugs. Can anyone point me in the direction of either a factory ignition table I can copy and then pull some timing out of to start?
We haven't tuned an M52 in house, but the M50 timing table should be close enough to get you started:
http://www.megasquirtpnp.com/mspnpp_maps.php
Matt Cramer
1997 BMW 328i convertible, 1972 Chevy C10 pickup, 1966 Dodge Dart slant six
BMW - where "Why doesn't everybody build cars the way they do?" meets "Why can't they build a car the same way everyone else does it?"
NO timing table is "safe" until you put a timing light on your engine and make sure the trigger offset is accurate. Its a quick check for a huge piece of mind.
I just opened the base maps on the the DIYautotune website and both the S50 and M50 tunes had 28 degrees of ignition timing in the 200 kpa row of the timing map, which is absolutely guaranteed to blow shit up on pump gas. The map looked good from 100 kpa and below, but you absolutely must reduce the timing in that 200 kpa row.
Here are some more sources to reference
https://www.bimmerforums.com/forum/s...gnition-tables
Thanks for the heads up - I'll have the maps updated to pull timing above 100 kPa.
Matt Cramer
1997 BMW 328i convertible, 1972 Chevy C10 pickup, 1966 Dodge Dart slant six
BMW - where "Why doesn't everybody build cars the way they do?" meets "Why can't they build a car the same way everyone else does it?"
The base M50 ignition map is what I used on stock compression. As perry mentioned above ^. I adjusted everything above 100kpa. but everything below I left alone and it worked like a charm.
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