GM 502 Accel DFI Trouble c

[Amsterdam96]

Greetings to you all!
I've recently become the proud owner of a '93 Silverado pick-up truck. She has a 502 in there and an Accel supercharger, for the most part this is all good news. The problem however is that what I believe to be the ECM or perhaps what I should refer to as the DFI is 'apparently' of the PROM/EPROM type and according to someone who is more informed than me it dates back to 1987. Now if this is true, how would I go about diagnosing or possibly re-writing the contents of the Accel DFI? I was told I'd need a 386 or 486 computer and that it should be a portable one. This is slightly silly but still feasible, if I'd find the appropiate software then I'd be willing to try this approach. Does anyone have any feedback or possibly other suggestions? or perhaps someone has an alternative EFI system that's compatible with an early Accel air intake/super?
Any suggestions are welcome and will be much appreciated! If anyone likes, I'll happily provide photos of the on-board computers/wiring as well as of the truck or the engine & air-intake.
Thank you all in advance for your time & effort!

[dave w]

I would think the original computer for the 93 Silverado would have been the 16168625 with a 4L60E http://www.gearhead-efi.com/Fuel-Inj...Information-E6
or the 16196395 with a 4L80E http://www.gearhead-efi.com/Fuel-Inj...Information-OE

Is your transmission computer controlled?

dave w

[Amsterdam96]

This particular Silverado is a 3500 and presumably comes with a 4L80E (Thus I assume it's computer-controlled).
I don't have a diagnostic tool/ the right wires and hardware to connect to my 'Electronics Control Module'.
As of right now I cannot upload photos onto the forum, I'm uncertain as to why, file-size & format seem to be according to the guidelines. I hope I'm not being a gadfly here!.
I'll post photos of the ECM as soon as I can. I'm also not sure if the computer is original seeing as the engine and supercharger are not factory options!
Despite all this, thank you for your swift reply Dave!

[dave w]

The stock factory 1993 GM computer is not designed for Supercharger Boost. Typically, aftermarket computers designed to optimize Supercharger Boost performance will not control or operate a computer controlled Automatic Transmission (4L60E / 4L80E).

In my humble opinion (IMHO), to optimize the Supercharger performance the factory computer is inadequate and should be upgraded to an aftermarket system like Dynamic EFI https://www.dynamicefi.com/

The challenge is: Inadequate vs. Optimized computer controlled Supercharger?

dave w

[Amsterdam96]

The stock factory 1993 GM computer is not designed for Supercharger Boost. Typically, aftermarket computers designed to optimize Supercharger Boost performance will not control or operate a computer controlled Automatic Transmission (4L60E / 4L80E).

In my humble opinion (IMHO), to optimize the Supercharger performance the factory computer is inadequate and should be upgraded to an aftermarket system like Dynamic EFI https://www.dynamicefi.com/

The challenge is: Inadequate vs. Optimized computer controlled Supercharger?

dave w

You suggested a Dynamic EFI, could this EFI control the transmission and other electronics as well as the injection/supercharger? If not, is it possible to get two different computers that would work well together?

[Amsterdam96]

I finally managed to upload the photos. This is the casing of my on-board computer. How can I figure out if this box controls the transmission. Will I have to try and follow the wires or is there a better way of going about this?
Again, the aftermarket injection is from Accel.
The transmission is a stock 4L80E.
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