Autosport Labs

Here is a diagram of the system I built with 2 MSD DIS-4 modules. I am completing a digram with 1 DIS-4 module. In either case the same problem occurs.

The twinpost coil looks promising. But this coil normally plugs into a factory interface. Would this setup need some type of interface like an MSD 8870 or could the primary switching wire and power wire plug right into the bottom of the coil with spade connectors?

Thanks again,

John

I likely will not get around to working on this until October. I returned the car to HEI so I can run my Autocross events. I looked at the car again today and the problem is still finding a suitable mount. The two coil packs tend to be heavy when trying to mount them. Thanks for your help and opinio...

My original build was a mockup of typical EDIS with 2 coil packs. I installed the MegaJolt to handle the timing as the Corvette ECU EST signal would not advance the timing. I was not satisfied with the mounting of the coil packs because I was not able to fabricate an acceptable mount that I felt wou...

Although the resolution of the picture is not clear, the two harnessess coming from the top of the page next to each coil are in fact the factory wiring. You can see the actual instructions here from MSD: http://www.msdignition.com/WorkArea/DownloadAsset.aspx?id=15032386155 This is a PDF document: P...

My original question: "Is there any way that the Megajolt running the default MAP could cause this problem?" was a search for another opinion based upon the lack of response from MSD. In response to your post, I agree; I don't think the MegaJolt is causing the problem. I would assume, base...

Thanks for verifying my understanding of the EDIS system. I could not get JD at MSD to understand that point. On an ocscilloscope I have four good signals from the EDIS module to the DIS-4 that do not show any problem when I get the miss. The frequency changes when I raise the rpm which confirms tha...

I spoke with JD at MSD. He seems to think the Megajolt is causing the problem. I am sending him the Megajolt, EDIS Module and a wiring diagram for them to test my setup. He claims the Megajolt does not have the power to run the coil drivers. My understanding is the Megajolt provides the SAW/SPOUT si...

I verified today that the EDIS Module will not fire 8 coils. Hence the need for the MSD DIS-4. I will be returning the car back to HEI because autocross season has begun. I will probably not get around to trying to make the EDIS work until October. Although my CKP signal looked good on the Ocscillos...

Original build was with two stock coil packs. The engine ran fine but I did not run it at 3800rpm because the wiring was only mocked up. I did not like the way the coils mounted where the distributor had previously been located. When I changed to 8 stock COP coils the engine would not start. When I ...

:?: This is a copy of a post that I made to the MSD Forum. Is there any way that the Megajolt running the default MAP could cause this problem? I am waiting for a serial to USB connector to arrive in order to use the Megajolt software. The MSD Tech Line leaves much to be desired. I spoke to a disint...