Hello
I have run MS1 with fuel delivery only on a Chevette for a year or so, and am upgrading to MS2 for Ignition.
The MS1 Setup uses a TBI unit from a Fiero 4cyl Iron Duke Engine, all I had to do was make an adapter plate for the 4 bolt to 2 bolt and has been very easy and reliable.
The Chevette uses a 4-pin HEI setup with remote coil and uses the same huge 8cyl housing distributor run from the crank, except using a 4point VR sensor instead of 8. The signal is clean. However, I'm hoping someone has already setup a coil similar to the one I'm using, and I can forward me some dwell settings. The coil is marked 8M12, and I believe is common for V8's.
Chevette Coil - Dwell Settings
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0). For tuning/troubleshooting questions, please attached a datalog and your MSQ file to your post.
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Chevette Coil - Dwell Settings
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1985 Chevette Daily Driver
1985 Pontiac Acadian Ice Racer x2
MSII with Fiero 4Cyl Iron Duke 700Series TBI, Direct Coil Driving
1985 Pontiac Acadian Ice Racer x2
MSII with Fiero 4Cyl Iron Duke 700Series TBI, Direct Coil Driving
Re: Chevette Coil - Dwell Settings
have You read this one: http://www.megamanual.com/ms2/GM_7pinHEI.htm 
As for dwell, i use MSD Streetblaster2 remote coil and use dwell at around 2-2,5 ms, my setup is TPI alike but all of these are simmilar
best regards
So propably You will need to swap to 7(samll) or 8 pin ignition module.4 pin module - electronic ignition, but doesn't do computer timing control, top left
As for dwell, i use MSD Streetblaster2 remote coil and use dwell at around 2-2,5 ms, my setup is TPI alike but all of these are simmilar
best regards
Pontiac Firebird 305 LT1 intake, L82 cam
MegaSquirt II with mod's + TPI adaptor board, MSExtra 3.3
MegaSquirt II with mod's + TPI adaptor board, MSExtra 3.3