I have a 1990 Corvette, which has the 1227727 running $8D. I'm looking at tuning it for boost, but I can't find an option that preserves the ECM-CCM communications required in '90-'91 vettes for some dash displays (and possibly ABS/climate control).
I'd really like to have more functionality than stock, such as being able to run flex fuel or use a wastegate to control boost based on gear/alcohol content/etc.
I see a few options:
- Upgrade the hardware (standalone/EBL Flash) and either replicate CCM comms or somehow leave the 727 connected for this functionality. No one seems to know what the datastream to the CCM looks like, and I have no idea how I'd run the stock ECM in parallel with a standalone.
- Add a RAM chip to my ECM and hack $8D to make it do what I want. Toooooons of work.
- Flash $58 or $59. Edit: this CF post says that $58 and $59 won't work.
- Use it as-is with a 2-bar MAP sensor. Not considering this.
Can anyone comment on this?
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