dizzy differences

waggaclint · Post by **waggaclint** » Sat Mar 10, 2007 6:08 pm

just a quick question for you guys out there is there any differance in dizzys on ea82 motors (ie are the EFI & Turbo ones differant to say a carby one)...

Gannon · Post by **Gannon** » Sat Mar 10, 2007 7:07 pm

Yes

All Carby and the 84-86 MPFI and Turbo had a Breakerless Disty (Magnetic Reluctor & Hall Effect Sensor) with Vaccum and Centrifugal Advance. Ignition Timing was not controlled by the ECU. Turbo models had 2 extra wires that went to the Knock Control unit.

87-94 MPFI and Trubo models had an Optical Disty (Disc with 360 slots, LED/Photodiode Sensor) which utilised a Crank Angle Sensor. The ECU uses input signals from the engine sensors and ECU ignition map to calculate the optimum ignition timimg.

steptoe · Post by **steptoe** » Mon Mar 12, 2007 9:54 pm

think it musta bin the four plug ecu dizzy has no guts at all on EA82T no advance stuff or nothing, must be something in there surely ??

YouTube · Post by **El_Freddo** » Tue Mar 13, 2007 12:46 pm

In the MPFI dizzy, all you will see is the rotor button. If you remove the button and the plate below, you will see the optical sensor and the disc with the holes in it as Suparoo explained.

There are no advance vacuum hoses or anything. My dizzy has a wire with a 4 plug on the end of it (91 MPFI system with hotwire AFM).

Hope this helps you out.

mroberts · Post by **mroberts** » Tue Mar 13, 2007 3:21 pm

What would happen if you put the MPFI distributor and computer into a carby car - obviously you wouldn't be hooking up the injectors ... could you get better ignition control ?

Gannon · Post by **Gannon** » Tue Mar 13, 2007 4:11 pm

I suppose you could, but you would have to have all the MPFi sensors, like throttle position, air flow, coolant temp ect ect. to make full use of it

YouTube · Post by **El_Freddo** » Wed Mar 14, 2007 1:20 pm

Mroberts, If you were going to the trouble of using the MPFI dizzy on the carbie engine, you'd be better off changing the heads and inlet manifold to MPFI and run the engine fuel injected, or drop a MPFI engine in while you doing the wiring.

The hardest part of the conversion to me was the wiring. I spliced a '91 MPFI wiring into an '88 carbie wagon, used all the '91 wiring from the head lights to the rear seat (including the dash, i gained a tachometre, yay! It also give you options of electric mirrors etc), sounds easy, but i had to work out how to join 34 wires from the '91 into 28 from the '88. It turned out that some of the wires in one of the looms were double backed, it was just a pain in the ar*e to do.

I joined the two together to avoid pulling my rear interior apart (didn't want to break anything or have it not go back in properly). But in hind sight, it would be easier to get the whole loom from the donor car and swap it with the standard loom.

Sorry if i've dampened your idea, but it would be easier to do the whole swap.