Randall,
After looking at the other vacuum advance numbers in the chart, the advance is
lower for the distributors for Lucas number 40735 and 40795. If one doubles
the degree advance numbers for these distributors, one gets advance numbers in
line with the rest of the distributors in the chart for the same vacuum. I bet
that the original specs for these distributors were originally in camshaft
degrees from what your earlier post stated.
Greg Perry
-----Original Message-----
>From: Greg Perry <rgperry@earthlink.net>
>Sent: Sep 11, 2006 6:03 PM
>To: Randall <tr3driver@comcast.net>, triumphs@autox.team.net
>Subject: RE: [TR] Vac Advance
>
>Randall,
>
>The numbers came from a vacuum advance distributor chart from my British
>Leyland
>Triumph Repair Operation Manual for TR4, TR4A, TR250,TR5 and TR6 published in
>1977.
>I bought it from a Jaguar dealership in the early 80's. The chart states
>degrees
>crankshaft advance- minimum and maximum at the top and inches of Hg - vacuum
>on
>the side. I have found some errors in the manual through the years. The best
>one
>is the firing order for the TR6 is wrong (1-5-3-4-6-2) should be (1-5-3-6-2-4).
>
>Greg Perry
>
>-----Original Message-----
>>
>>> Vacuum Advance dist. 40795
>>>
>>> Inches Hg Degree Crank advance
>>> 2.0 0
>>> 3.0 1
>>> 4.0 1.75
>>> 5.0 2.5
>>> 6.0 2.75
>>
>>Interesting numbers, Greg. Where did they come from ? In particular, why
>>do you believe those to be crank degrees instead of camshaft degrees ?
>>
>>Randall
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