Distributor replacement

[casper171072]

In the past it appears someone has over tightened the distributor clamp which has Broken the corresponding ring on the distributor case. Looking at a replacement for it I was wondering about a 25D if that would work in place of the DM2. The 25D being more commonplace and easier to get bits for etc if anyone knows

[2robert4]

A 25D will do but you have to understand that the centrifugal advance needs to be correct to the camshaft fitted for engine to function as originally designed. I have used the Distributor Doctor to re engineer a distributor I purchased to replace the worn out original and they did a fine job so rather than bin your old one you can have it rebuilt and correctly matched to the advance curve for your engine if you have had a different camshaft fitted for performance reasons then you need to let them know and the distributor will be set up to match that.
Hope this is of some help?
NP

[canuck]

I second Nigel advice .  

A rebuild/re-curve, (to match your engine and modern fuels) of your original is much preferred. Martin will do a proper job, I have only seen his work never experienced first hand. 

On this side of the pond, we have an equivalent service, (Advanced Distributors) that I have used on many of my cars. The result is stellar.

The distributor fitted to my MGB suffered a broken clamp ring as you write. The fix is this area machined down and a replacement steel one shrunk on. (below)
Better than new IMO.




Martin also offers quality contact breaker points and Red rotors. 

Bruce

[noddy]

While you are changing the distributor, why don't you fit some form of electronic ignition. Simple, reliable - fit n forget!
Roger

[casper171072]

Thanks for the advice Roger I have now got a fast road cam in the car so it will now be different anyway. And I have been running an accessory electronic set up for the last two years without issue so I will continue with that when I get everything back together

Thanks again Richard

[canuck]

Aug 30, 2019 19:35:53 GMT casper171072 said:

I have now got a fast road cam in the car so it will now be different anyway. 

Hello Richard

With a camshaft change as you have done, it becomes even more important to match the advance curve, (electronic or manual spark trigger) to your engine specification.  The engine performance improvements is remarkable. 

Remember the distributor is the 'brain' of the engine.  

Bruce