Distributors for TBI? HEI module?

[srobertsfsj]

I've searched at bit and I found one but it seems kind of pricey. Does anyone know of any other brands?

http://www.affordable-fuel-injection.com/ixxocart/products/EFI_Distributor_Ford_AMC_V_8-53-23.html

Basically its just a dizzy with no mechanical or vacuum advance, correct? How hard is it to convert an HEI dizzy to work with EFI, or is it even possible?

[FSJ Guy]

If you convert over to computer controlled ignition timing, you can use your stock distributor by removing the centrifugal advance weights and springs and welding the mechanical advance parts togeth. Disconnecting the vacuum hose removes that part of the system. The GM ignition module can be triggered by the stock AMC (well, Ford) distributor.

It's easy to do and cheaper than $400. And now you've got computer controlled timing!

Details in my sig link.

[FSJ Guy]

And of course you'll need to be able to burn chips. But you're still at well under $400.

[tgreese]

You just clamp the vacuum and mechanical advance so that all the advance is provided by the spark control.

There's some info on the various HEI modules that contain spark control on the Megasquirt site. http://www.megamanual.com/ms2/GM_7pinHEI.htm You could also use the Duraspark - or any other distributor that provides a VR output. You can do the same stuff with the GM ECU; you'd also need an external HEI (or other) module that's capable of being controlled by the ECU.

(Basically echoing Ethan - oh well).

[Walt]

I'm in the process of converting to TBI right now, and just hooked up a TBI ignition module to my duraspark dist. Here's the write-up:

http://www.ifsja.org/forums/vb/showthread.php?t=108407

Skip to the end of the thread, the section on the 4-pin HEI module is mostly not applicable for you.
Then, like the other guys said, just dismantle your existing dist from the top and disable the mechanical advance.
Personally, I'm not going to weld it, just make a lockout plate to put in place of the springs/weights. I'm sure welding would be superior, but if I need to back off the TBI install for some reason, I don't want to have to procure another dist.

[Woodchomper]

I've searched at bit and I found one but it seems kind of pricey. Does anyone know of any other brands?

http://www.affordable-fuel-injection...V_8-53-23.html

Basically its just a dizzy with no mechanical or vacuum advance, correct? How hard is it to convert an HEI dizzy to work with EFI, or is it even possible?

Scott, I did some research on this question a couple of years ago:

http://www.ifsja.org/forums/vb/showthread.php?t=69158

What I learned was never buy a distributor off ebay. I still like the idea of a TBI only distributor just for cleaning up the wiring if nothing else. I converted my motorcraft distributor and remote mounted the GM ignition module on a heatsink. This setup has served me fine.

I had a chance to check out the MSD 8519 distributor when I helped a local Jeep shop with an EFI conversion. What was nice about the MSD was that you could lock out the mechanical and vacuum advance. With the MSD you could actually run the distributor prior to converting to EFI and then just lock out the timing after converting to EFI.