Hi Randall
I have the exception to the rule!
I was playing with the timing on my car the other day, and when I put the
vacuum line back on the manifold the timing jumped, knew something was
different but your comment just made it all fall into place!
The car in question, a 2500PI, vacuum advance line comes off the manifold
balance tubes! I guess this is why they deleted vacuum advance on later PI
engines saying it had little effect, could be interesting to find a spare
throttle body and try a timed port. Guess I better study some carb bodies to
work out where to put a timed port!
Graham.
----- Original Message -----
From: "Randall Young"
Subject: RE: Checking Distributor Vacuum Advance
> Sorry, that's not right. The vacuum advance port is 'timed', meaning it
> gets no vacuum at idle. Every car I've ever wrenched on is this way,
> including all TR2-4A. Only the vacuum retard port on later cars, or a
> manifold vacuum port like for a brake booster or carbon canister, has
vacuum
> present at idle.
> Randall
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