7 replies to this topic

[Keisar]

Hello, 

 

 

I will replace my actual distributor with an 123ignition programable but before everything I want to compare the preset curve in the 123ignition and the curve and the original one. 

 

I cannot find it either on google or technical books I have. 

 

Do you have any idea where I can find the curves ? 

 

This is a 92 cooper. I'm sure it's an electronic one. Here are the refs : 

 

 

Thank you. 

 

 

[ACDodd]

Pointless excercise. The curve contained in your dizzy now does not match that which the manufacturer I installed when new. Wear determines the shape of the curve you now have. To compare. Simply measure what your dizzy is doing now, using a strobe light.

Ac

[dotmatrix]

But why not have the Lucas renovated instead. Its a good dizzy in my opinion

[Dusky]

I posted a pdf with loads of curves before. Someone on a desktop might find it

[Keisar]

I will really appreciate :) 

The curve I have in my 123ignition dizzy is : 

 

 

The datas I can get from Autodata are : 

• 10-14 degrees at 1520rpm
• 20-24 degrees at 4840 rpm
• 22-26 degrees at 6000 rpm

 

And both does not match at all, so the curve programmed is completely wrong. 

[Spider]

I'm not able just now to 100% be able to confirm these figures for the Original Distributor, however, they will be very close and should give a starting point at the very least;-

 

These are all Distributor Numbers (double them for Crank Numbers);-

 

Centrifugal Advance;-

 

940 RPM     2.5⁰

1420 RPM   4.0⁰

2670 RPM   7.0⁰

3120 RPM   8.0⁰

 

Vacuum Advance;-

 

Starts at 3"/Mg

Finishes at 12"/Mg and gives 12.0⁰

[racingbob]

I sent my Lucas electronic to AC on the forum excellent job huge difference in performance picks up down low great 65 quid well spent

[jjazreid]

Did you get this sorted?

I've got a BOC fitted with a Cooper Carburetor & the original distributor, I reckon my timing is all over the place because of the vacuum advance. Does your distributor see full vacuum @ idle? I'm pretty sure this isn't right for my car, so I was thinking about a 123 distributor to sort it. Are they any good?