Re: [T3] Some carb or ignition problems...

[Ben Doughney <ben_d@clear.net.nz>]

<x-charset ISO-8859-1>on 16/9/2002 10:22 AM, Dave Hall at dave@hallvw.clara.co.uk wrote:

> BTW which vac connection are you using (as there should be 2 to choose
> from)?

I am using the one on the carb, and the other one on the manifold is plugged
up.
 
> NOTE: The vacuum unit does not advance the ignition timing.  It retards the
> ignition 7° at idle speed and returns the plate to the static position after
> throttle opening."

That is interesting, and something that I would have changed by putting the
FI distributor in, because it has a vac. advance only. Perhaps I should
start looking for a dual vac. distributor. Does anyone know the part number
of the proper part for my year ('71)?

> There's a bit more to the design, as the two ports have different bores, so
> there is a gradual change to the plate position.
> 
> It would be worth watching what happens to the advance using a timing light
> as the throttle is gradually opened.   Try timing it on 7.5 deg BTDC and
> check what the maximum advance ends up at (up to 28 deg is considered fine).

Can I measure 28 deg. by counting the notches around the fan? I don't have
one of those advance dial timing lights, I looked around for one but nobody
seems to know what they are down here.

Thanks,
Ben Doughney

'75 1200L
'63 1200 - Ringo
'71 1600TL

http://members.tripod.com/~superkafer/ 


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