Vance---I will attempt to explaim what I think happens with the
dwell/point gap.
First off, when you said your timing was right on at 4 deg.ATDC I
mistakenly assumed that the point gap was also corrrect, as they are
interrelated. So I didn't compete for the RR's. ; )
Meanwhile, a dwell of 60 deg. should mean that the points didn't open at
all. (Why the gap closed up during "storage" is another matter.)
So far as why the engine seemed OK at high revs indicates that the cam
that operates the points cause the movable point to fly open just a tad,
thus giving the necessary break of contact.
A dwell angle of 35 deg. indicates that the point gap is at .013 or very
close to it. (.013 + .013 + 35 = 60) The smaller the gap, the larger the
dwell angle. (Zero gap means 60 deg. of dwell)
Anyway, all of these little trials and conquering them adds to the
pleasure of keeping these cars on the road!
Dick
From:
vance.navarrette@intel.com(Navarrette, Vance)
David, Folks:
I thought I posted the
solution to the list, but it may not have made it. I have added the
original note below in case it did not get routed somehow. Dave More up
north was the winner.
Cheers,
Vance
________________________________
000503> . DING, DING DING!!!!!
We have a winner!!! Attaboy Dave, your kung fu is the best.
Points gap (or alternately - "dwell") was off by a country mile. Bentley
says 35 +/- 3 degrees of dwell, my points were set to 60 degrees of
dwell. Dwell can be approximated by setting the open gap of the points
to a known value (the actual spec eludes me at the moment). This is less
accurate than a dwell meter however as the dizzy can wear, etc, but it
gets the dwell acceptably close. I purchased an actual meter to set the
dwell, $39.
Perhaps someone could explain to me why this only matters at low RPM.
I know that dwell affects two things; Amount of energy stored in the
coil to fire the plug, and the amount of time permitted for the plug to
fire. But it seems to me that this should be a problem at high RPM, not
low RPM. At high RPM the amount of time for the coil to "charge" is much
shorter and therefore it seems as though this should be when you develop
the miss.
Anyway, Dave gets the attaboy...
Cheers,
Vance
-----Original Message-----
From: More, Dave [mailto:Dave.More@encana.com
<mailto:Dave.More@encana.com> ]
Sent: July 09, 2007 10:59 AM
To: owner-6pack@Autox.Team.Net
Cc: Navarrette, Vance
Subject: RE: [6pack] Colicky TR6. Prize for correct diagnosis.
Nobody's mentioned point gap?
Cheers,
Dave
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