XDI vs 12 plug dizzy

3literpwr · 06-14-2014, 04:08 AM

Looking into options for 12 plug and am contemplating both a 12 plug dizzy (JB, BURNS) or the electromotive XDI... The XDI is the cheaper option, but what are the other benefits?

sjf911 · sjf911's Garage

If you are considering EFI at some point, you could do a Megasquirt I or II kit with twin EDIS controllers/coil packs. It would certainly be less than a new dizzy, might even be able to do it for around $500 if you can DIY most of it. The EDIS stuff is robust, cheap, and easy to find in the u-pick yards.

toddu · 06-14-2014, 11:04 AM

Bragging rights

Todd

fred cook · fred cook's Garage

Quote:

Originally Posted by 3literpwr

Looking into options for 12 plug and am contemplating both a 12 plug dizzy (JB, BURNS) or the electromotive XDI... The XDI is the cheaper option, but what are the other benefits?

When I built my SC engine into a 3.3SS, I used the XDI ignition system. My main reason for going this route vs a 12 cylinder dizzy was ongoing maintenance costs. With this system, I don't have to worry about having to buy an expensive distributor cap/rotor in the future. The system was easy to install (just follow the very complete instructions) and worked the first time the engine was fired. I wanted to use a modified CIS system so room was an issue. I finally decided to make a bracket that mounts on the little shelf between the engine and the engine compartment firewall. I added two relays on the left side electrical panel and mounted the control unit inside the car behind the passenger seat. If I was to do it over again, I would buy the complete system that is provisioned for both ignition and fuel just in case I ever want to change out the CIS (which runs quite well). As it is, I would most likely just convert to PMO carbs and keep the inplace ignition system. Good luck with your project!

3literpwr · 06-15-2014, 04:53 AM

I had planned to run EFI on the car when I started building her, but changed plans recently. My initial thought was to use a system from PE-ltd.com (sponsored my last rally car) and build intakes using triumph 46mm throttle bodies. After some time I decided that carbs was a simple and much less time consuming endeavor.