| Quadrajet secondary actuating rod [message #353360] |
Tue, 31 March 2020 09:31  |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
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Senior Member |
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Anyone with access to a carb willing to send me a measurement? Or know of a published spec for the secondary actuating rod? 1. the length of the actuating rod from primary end tip to front edge over secondary end (top). and 2. the length of actuating from primary end tip to the front edge of secondary end down at the bottom, near the bend of the rod.
Here is a pic of the secondary end of what I would like you to measure. Above his finger, front side of rod where it hits the tang (to the primary end), and below his finger where the front edge of the rod sits in the slot (to the primary end of the rod).
http://www.gmcmhphotos.com/photos/cadillac-500-throttle-linkage-modification/p3996.html
It's easier to measure the bottom with the carb off, but even if you can only get a top measure that would help.
If you want to read a longer "why" keep reading...
My 1975 always got worse than expected mileage (6-7 with 3.42 gear and no toad). Comparing the secondary actuating rods, I realized mine is off on the actuating, and return. But the sheet that comes with a carb kit only says "bend tang" to adjust and my Doug Roe quadrajet book only says "don't overdo it". I'm thinking in 45 years the rod got bent, intentionally or otherwise. At idle, it does not even hold the secondaries shut.
I have five quadrajets I can put my hands on with a donation, junk, local friend, and my two. Top measurement on this rod has a 1/8 inch variation (about 3.2 inches), while the bottom measurements are closer to each other (about 3.07).
Thanks
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
[Updated on: Tue, 31 March 2020 09:35] Report message to a moderator |
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