Paul,
On a TR3/4 cap, the low tension lead cutout is directly
opposite from the coil wire lead.
If you use a Sprite or Midget distributor cap, the low
tension cutout is 90 degrees counterclockwise. Otherwise, the 2 caps
interchange, but can cause some confusion.
Peter C.
=====
At 03:30 PM 12/5/2007, Paul Dorsey wrote:
>I am still several weeks away from starting my TR3's engine (it came from a
>TR4). I know there is a typical and simple way to figure out when TDC (top
>dead center) occurs. I also know how this is done. However, just based on
>replies to this post, I wish to see where on the distributor and cap, and
>orientation of cap does firing of cylinder No. #1 supposedly occur. The
>reason is that I've been told that my cap's orientation is 45 degrees 'turned'
>from most folks. So, please bear with me.......
> Please don't answer these questions if your car is not
> properly timed...
>
>(1) Do you have 2138cc's as opposed to the earlier 1991cc's?
>(2) Do you know if it is a DM2 distributor?
>
>If one stands on the left side of the car, with the bonnet open, and stands
>directly over the distributor,
>(3) where is the the cap's no.# 1 wire? (What position on a clock dial?)
>(4) What direction does the vacuum advance point?
>(5) What position is the little wire enter the dist. that comes from the
>coil and goes to the points at?
>(6) With the cap still on, and hoping that it is a British Style cap (2
>lower, 2 upper wire cap), which direction does the cap point (because of cap's
>top coil wire)?
>
>I will summarize these answers in a soon-to-be post. Watch for it....
>Thanks,
>Paul Dorsey, '60 TR3 ( with a TR4 engine) CTsomething or another
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