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Wish I'd seen this sooner! I had many old Pontiacs: 64 GTO, 64 Lemans, 66 Bonneville, 66 GTO, 67 GTO, 69 Firebird 400, 72 Formula 350, 72 Grand Prix. I could tell you about Q-jets, the flap on the secondaries is a spring loaded air valve, which you can adjust for when the secondaries kick in. I still have a q-jet from my old 455 if you have more specific questions.
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Nov 4, 2020 22:01
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| # ¿ May 15, 2024 19:45 |
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Steve French posted:Yes, I'm aware that the secondary choke is there; I was a bit imprecise in my last message. What I was not understanding, but I think I get now, is that the hot air coil that is missing only ever controlled the plates on the primary, and that the secondary plates would just open due to airflow/vacuum when the secondary throttle opens, and that it's maybe more or less functional (depending on spring tension etc)? Exactly, the secondary spring tension adjustment screw can barely be seen through the linkage on the rear upper passenger side of the carb, there is a lock screw underneath that holds the adjustment screw in place:  I forget the size but the lock screw is an allen.
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Dec 1, 2020 19:13
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Those are pretty heavy aren't they? They called them "polycast", the honeycomb section is rubber or something else flexible.
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Dec 10, 2020 06:39
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cakesmith handyman posted:WTF? https://www.hemmings.com/stories/article/polycast-wheels While looking this up I see that 17x9 aluminum repros are available for about $900/set.
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Dec 10, 2020 15:17
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Steve French posted:
Those qjets are pretty pricy, would you consider a nice used one? Had it on my 455 before I installed a tripower setup. https://imgur.com/a/4uTPhuR
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Dec 11, 2020 03:00
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