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ECM Selection FAQ



AGAIN for the future FAQ
Comments welcome
Grumpy



There are hundreds of gm ecms, and each one has designed for a specific
usage.  While some folks can cross apply ecms for the novice it's far better
to look at the application and descide what to do from there.
    Ther are numerous editors out there for doing various ecms, but they
have less in then then a complete H offers information wise. folks commonly
use a hac ecm with an editor so for the easy changes they are so much more
convient

So what I'm listing here is common ecm, and when to use them
H means Hac'd
D means Distributor

4 cyl Port
1227730 H D

4 cyl TBI
1227165 D

4 cyl Turbo (Port)
1227749 D

6 cyl Port
12277730 H D

6 cyl TBI
1227747 H D

6 cyl Turbo
1227749  HDM
1227148  H DIS MAF

8cyl Port
1227730  HDM
1227165  HD MAF

8cyl TBI
1227747 HD

8cyl Turbo
1227749 HD

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