Dizzy advice sought

[iani]

My car is a Mk2 with Lumenition fitted and a 41525 dizzy. I have a spare dizzy picked up off eBay that has a Lumenition optical sensor and chopper fitted, this unit however is a 41336 Mk1 dizzy. I'm not very comfortable with electrickery to be honest and having read a few threads on this I've seen it suggested that the Mk1 advance curve might be better for rebuilt engines due to the use of county pistons. I would like to have my spare dizzy (41336) reconditioned and fit it to the car, keeping the current unit as the spare. My question is, should I have the 41336 reconditioned to Mk1 spec' or to Mk2?

Ian

[flying farmer]

It probably depends on wether you have mk1 or mk2 pistons fitted. If you have the county pistons fitted I would give the mk1 dizzy a good clean up and try it as it is before bothering to get it reconditioned.

Make sure the vacuum advance works and that the weights are free to move before fitting, hopefully the lumenition units are the same so you can just plug in the replacement dizzy.

If everything works as it should, and you do have the low compression County pistons fitted, you will probably notice you need less throttle than before at any given cruising speed due to the extra ignition advance.

Neil

[iani]

Thanks Neil, I'll give it a go.