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RE: Timing marks on a TR4

To: <triumphs@autox.team.net>
Subject: RE: Timing marks on a TR4
Date: Sat, 21 Aug 2004 21:47:29 -0700
> The book would have me utilise the little vernier
> mechanism to time it but I'd rather do it with a light and the
> pointer IF I knew where 4 deg btdc is.

The only problem with that is that the centrifugal advance may have already
started with the engine idling, meaning 4 BTDC is no longer the correct
value.

> Any suggestions?

RTFM ?

Seriously, if the DPO got the dizzy wrong, he may have gotten other things
wrong as well.  I think I would want to verify the TDC mark first (which can
be wrong for a variety of reasons), and then double-check the cam timing
from the (corrected) mark.  Then you can start worrying about ignition
timing.

I always set my TR3 ignition timing by the road test method anyway.

Randall

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