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Thread: MS3x safe ignition timing table?

  1. #1
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    MS3x safe ignition timing table?

    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?

  2. #2
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    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?"

  3. #3
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    Quote Originally Posted by Matt Cramer View Post
    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
    Thanks so much for posting that! I can't tell you how much searching I have done trying to find something like this.

  4. #4
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    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.

  5. #5
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    Quote Originally Posted by Gmfwd View Post
    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 understand that, but having a good starting point is much better then me trying to reinvent the wheel and start completely from scratch.

  6. #6
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    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


    86 325es, 2.8L m50, S476sxe, ProEFI 128 ecu, e85, solid rear axle, TH400 trans, 28x10.5w slicks, zip ties, popsicle sticks, tape
    best time 9.06 @ 151.8 mph, best 60 foot 1.30

  7. #7
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    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?"

  8. #8
    Join Date
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    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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