[TR] TR4 - Dwell v Points Gap

Randall tr3driver at ca.rr.com
Mon Jun 2 16:07:52 MDT 2008


> A dwell meter needs to know how many cylinders there are

Right.  The problem is that dwell is given as an angle, not as a percent.
Without knowing how many cylinders, the meter has no way to know what
constitutes a full circle.

> That's why I said that the spec of 60* dwell was suspicious...that 
> only leaves 30* or less for an open angle where the coil 
> charges.  Doesn't sound like enough to me...

Perhaps, but 60 seems to be the spec for all Lucas 25D4 dizzys, including
those fitted to MGBs and Minis.  

Randall


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