Dizzy and coil wiring

Adam · Post by **Adam** » Sat Oct 20, 2007 11:11 am

Hello All,

Can anyone help me ? I've just fitted a 3.5 SD1 V8 into a 1975 MGB, I have an electronic dizzy with the small box on the side (Lucas 35DLM8 I think). I'm trying to wire up the ignition, I need some sort of wiring diagram to go from my old MGB wiring to the electronic V8 set up. I think I have the alternator sorted just the coil and dizzy not sure about?. I'm at least 1 wire short to the dizzy? Do I need a ballast resistor?

If you could help me I would really appreciate it.

Many thanks Adam

jrv8 · Post by **jrv8** » Sat Oct 20, 2007 11:44 am

Hi,
Are there 2 or 3 pins on the amp ?
Jim

Adam · Post by **Adam** » Sat Oct 20, 2007 12:04 pm

Hello Jim,

the amp has 2 spade connectors.

Cheer Adam

jrv8 · Post by **jrv8** » Sat Oct 20, 2007 12:21 pm

Hi Adam,

The outermost one connects to the coil (-)
The inner one connects to the coil (+)

+12v should be connected to the coil (+) through the ignition switch, and the pick up wire from the rev counter should be connected to the coil (-)

No ballast resistor required, but make sure that you're using a coil suitable for electronic ignition.

Regards
Jim

Adam · Post by **Adam** » Sat Oct 20, 2007 1:23 pm

That dosn't sound too hard, even for me!

I just need a battery and finish connecting up my exhaust and I'll try firing it up!

Thanks for your help Jim

Cheers Adam

CastleMGBV8 · Post by **CastleMGBV8** » Sat Oct 20, 2007 8:53 pm

Adam,

A 75 car (Rubber Bumper) would have a ballast resistor and a six volt coil, ypu will need provide a new positive supply to a new 12volt coil and then connect to the amp onthe side the of the dizzy the white wire with black tracer is for the tacho.

Kevin.