Programmable Delco Ignition Module

[VL400]

There are reports that the exposed heatsink coils can go in to a protection mode when dwell exceeds around 8ms. I suspect its also heat related, so sustained running at high dwell values could also contribute. I havnt had this happen on a running engine, and some have used these coils with success on my module. But as its an unknown I wouldn't recommend purchasing them, but if you had a set already then I also wouldn't hesitate to try them.

My pick would be LS2 coils...
D513A (12570616) LS2/LS7 First Design
D514A (12573190) LS2/LS7 Second Design

However LS1 coils are also a great upgrade over the stock setup.

I tried using the truck coils with heat sink on a CNP conversion for an LT-5. They did not work however the "square" coils did.

This is unrelated to the module in this thread, you were using a factory LT5 ignition module which uses current sensing feedback for dwell control that the LSx style coils do not provide.

[Xfirez51]

Apologies if my post implied that the coils were being used w ur module. They of course were not.
I was attempting to provide my experience w two types of LSx coils, one of which allowed the motor to idle while the other (heat sink) would not start the motor.

[Wade]

Will a 12558948 set of ls1 coils work? I've picked up 8 for $80 thought it was a bargain. But knowing my luck they won't

[Holden202T]

looks like a standard LS1 coil, so yes it will work fine.

[Wade]

Sweet cheers m8

[Wade]

Can anyone confirm that this is actually the wiring diagram for a 4 wire vt distributor?

[immortality]

That looks correct.

This is from the factory service manual.

5b.pdf

(379.33 KiB) Downloaded 326 times

[Wade]

Any one got a wiring diagram for how to wire this into my car? Vr with vs manual loom ls1 coils and the vt distributor?

[immortality]

There won't be anything to suit, will need to work it out around the wiring for the new ignition module.

[VL400]

Wire it up something like this....

VL400_Ign_VT_Dizzy.png (81.52 KiB) Viewed 5491 times