[TR] TR4a ignition advance

Randall tr3driver at ca.rr.com
Fri Sep 21 11:03:36 MDT 2007


> But I don't believe the above figures are in crank degrees, but  
> rather distributor degrees (half of crank).  But the initial advance  
> maybe crank. 

FWIW, I agree with Darrell.  In addition, the rpm figures shown are in
distributor rpm, not crank rpm; and the vacuum advance numbers are in
distributor degrees.  

Not entirely certain, but I think the 2.75 degrees @ 6" Hg is a "minimum"
figure.  My information gives a "nominal" figure of 3 degrees maximum
advance @ 6" Hg.  This is for P/N 54413565, which is the advance unit that
is supposed to be fitted to a 40795 dizzy.

Randall


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