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Thread: Converting my Camaro from 4L60 to M6 COS5

  1. #1
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    Default Converting my Camaro from 4L60 to M6 COS5

    Let me start by saying how much great info I've gotten from this site over the years. You guys have been a big help with all the info just here for the reading. I haven't found much from searching this time so I thought I'd just ask outright. I've been running my Camaro on COS5 for a long time so all the tunes I have for the current set-up are in that format. After last season I decided I wanted to do something different and convert to the M6. I've run COS5 to use the nitrous tables and it has worked awesome. Since I don't plan to change the engine/nitrous combo I'd like to keep that part of the tune mostly unchanged except for whatever tweaking I need to do with throttle ect.

    What would be the easiest way to do the conversion? Do I need to go to the stock OS, copy the trans cal, and then re-convert to COS5? I will be hooking up everything on the T56 so I need the PCM to control the reverse lock out or I would just turn things off.

    Any advice and experiences are greatly appreciated, thanks in advance.

  2. #2
    Joe (Moderator) joecar's Avatar
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    Do not swap the trans segment in a COS file.

    The best thing to do is this:
    First, find an M6 12212156 Camaro (cable throttle) file and copy your engine tables (and engine diagnostic tables) into it (using the compare/alternate/update feature of the tunetool).
    Then, use this updated M6 12212156 file to update to COS5 (full flash COS5, cal flash from M6 12212156; and then update B3647 and other A00xx tables using compare/alternate/update).

  3. #3
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    Cool, makes sense. Doing a blank full flash of COS5, cal flash from M6 12212156, then finishing up the tune like stated in the COS5 tutorial makes perfect sense. Thank you for clarifying that for me.

  4. #4
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by ND2RACE View Post
    Cool, makes sense. Doing a blank full flash of COS5, cal flash from M6 12212156, then finishing up the tune like stated in the COS5 tutorial makes perfect sense. Thank you for clarifying that for me.
    Let me know how it goes.

  5. #5
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    Just a quick update. Full flash of COS5, cal write of 12212156 M6, then read out the tune and copied and pasted all the tables from the original A4 tune. Worked great. Now I just need a Clutch Pedal Position switch hooked up to make the rest of it work the way it was intended, and fine tune some load points I could never hit with a 4000 stall converter.

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