Thread: DM2/25D Distributor

Is there a difference in performance between a Lucas DM2 and a 25D distributor, if both are fitted with a 4-18-12 vacuum unit?
.W.

Originally Posted by Timj

The vacuum unit is not the only thing that controls the advance curve. The weights and springs inside are probably more important. If both distributors came from a landrover 2.25 then they may be set up the same but there may be differences based around compression ratio, tune for pollution control and tune for a particular carby depending on the year they came from. Tuning a distributor is as much a black art as tuning a carburettor.

Cheers,

TimJ.

You're right of course. I forgot about the springs and the centrifugal weights.
.W.