James, to the best of my knowledge there is only one timing mark on a
BT7....TDC. I will be corrected if I'm wrong. To set up the timing
stroboscopically you will need an advance timing light. They allow you to
dial in the degrees you want so when you turn the dizzy you set it up for
TDC. So if you dial in 15 degrees you then TDC it. A couple of things to
mention, don't go by the tach in the car when you are trying to get it to
idle at 600 rpm. Use a digital tach like what would be part of the advance
timing light system. I doubt very much that your car tach is accurate at
those low rpm's. One or two hundred rpm makes a difference when you time it.
Second I would suggest you try using 15 BTDC in the cooler damp months and
maybe 12 BTDC in the warmer dry months. I found on my car that 15 was fine
in the winter but when it warmed up and dried out it ping'd a bit. I tried
10 and found that worked fine but it had noticeably less power, 12 for me
was a good compromise....Neil
----- Original Message -----
From: "James Lea" <clocks@midcoast.com>
To: "List Healeys" <healeys@autox.team.net>
Sent: Sunday, June 13, 2004 12:12 PM
Subject: Timing marks?
> I got out my trusty timing light today in preparation for timing the BT7
but
> there doesn't seem to be any marks on the wheel except the TDC mark. I
know
> that it is supposed to be set at 15 deg. at speed and 10 deg at 600 RPM
but
> with no marks to go by, I am confused. Were there marks that have been
lost
> over the years or were they never there and I am supposed to guess. Thanks
for
> any advice forthcoming. Cheers, JL
>
> James Lea Pres.
> MMSCC
> Rockport Me. 04856
> 1962 BT7 II
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