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Re: Pre-emission Distributor Part Nos.

To: B Strachan <bstrachan@home.com>
Subject: Re: Pre-emission Distributor Part Nos.
From: "John F Sandhoff" <sandhoff@csus.edu>
Date: Mon, 28 Aug 2000 12:44:17 -0700
To add a bit to Barrie's very good writeup about distributor timing:
> Here's an easy way to tell, if you have a timing light...

The R-16, I believe has marks every 5 degrees, not 4.
But way more importantly, for those of us with SU and not
solex - DISCONNECT THE VACUUM ADVANCE before doing
this test. The Vacuum advance adds MORE advance at part throttle,
so you'll see a non-smog distributor show way more than 15 degrees
total advance at part-throttle. This could really confuse you.

To be sure, of course, pull the breaker plate and see what's stamped on
the advance plate. 7.5 is non-smog and 17 is smog. Oh - and the
vacuum advance hose connects to a port underneath the rear carb
(R-16) or on top of the front carb (U-20), NOT to the intake manifold.
It should have near-zero vacuum at idle. Amazing how many have
been incorrectly rerouted...

-- John
     John F Sandhoff   sandhoff@csus.edu   Sacramento, CA
 

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