At 01:46 PM 6/2/2008, Jim Muller wrote:
>If it just measures on-time or off-time and
>normalizes that against a firing interval then it would depend on how
>it "knew" the firing interval.
A dwell meter needs to know how many cylinders there are, either by
switch or by scale. My Mac pro meter has separate scales for 4, 6
and 8 cylinders.
The dwell angle is the amount of distributor rotation ~per cylinder~
where the points are closed. Typically, that number should be half
of the total rotation per cylinder. Bentley sez for TR6, dwell is
35*, open angle is 25* for a total of 60*. 60 x 6 = 360. For the
Spitfire, dwell is 51*, open angle is 39* for a total of 90* 90 x 4 = 360.
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...
Jeff Scarbrough 75 TR6 x 1, 76 1500 x 2, 78 1500 x 1, 80 1500 x 0.5
http://www.fishplate.org/vehicles/
Athens, Georgia #354
_______________________________________________
Support Team.Net http://www.team.net/donate.html
This list supported in part by the Vintage Triumph Register
http://www.vtr.org
Triumphs@autox.team.net
http://autox.team.net/mailman/listinfo/triumphs
http://www.team.net/archive
|