George----You're right, of course, about which way the engine idle goes
when the vacuum line is removed. Well, at
least I got the first part right! (more or less) The vacuum retard on my
car only gives a 12 deg. swing, for some reason. Thanks for keeping me
on my toes!
Dick T.
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Date: Tue, 24 Apr 2001 15:24:21 -0400
From: "G. Osmundsen" <gosmund@bellsouth.net>
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To: Sally or Dick Taylor <tr6taylor@webtv.net>
Subject: Re: Engine stumbles. . .
References: <11631-3AE5BDB8-3607@storefull-282.iap.bryant.webtv.net>
Sally or Dick Taylor wrote:
>
> Jim---The 'book' suggests 4 deg. ATDC when the vacuum retard line is
> connected to the canister. If yours is connected AND working, it is the
> same as setting the timing at 8 deg. BTDC with this line disconnected
> (and plugged) Check yours by pulling this line off with the engine
> idling. If it slows down and the timing retards, it is seeing vacuum
> from the carburetor and is working as designed. Many do not connect this
> line, and simply plug it, and set the timing to somewhere between 6 and
> 12 deg. BTDC depending on other variables in the engine. Your choice.
>
> Others who also had a problem when installing the Pertronics seem to
> have resolved this and are now back using it. Maybe they'll share the
> info.
>
> Dick T.
Dick,
Actually, if you disconnect the vacuum line which feeds the vac retard
unit while the engine is idling, the idle speed will jump up in rpm
(due to the sudden advance in timing) not slow down. The vacuum unit
on the six retards the timing when vacuum is applied. Since the retard
unit has about a 14 degree range, setting the timing to 4 deg ATDC with
it connected is the same as setting it to about 10 degrees BTDC with it
disconnected.
Regards,
George
76 TR6
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