Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Warming carburetor spacer

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74 Powerwagon:
I live at 9k in Colorado and it does get quite cold sometimes, like -35 overnight or 4 daytime high, but it is generally low humidity. I am putting an edelbrock streetmaster on my fe 390 with a qjet that Cliff has helped me dial in. I am hearing that if I don't block the exhaust crossover the exhaust will severly corrode the aluminum and ruin the intake. I would like the heat in the intake for winter, summer heat can be handled easily enough. Did GM make a qjet spacer with coolant flow to warm the carburetor, I know at least Ford did. Does someone make an electric carb warmer baseplate? I do have a coolant heater on the truck that warms the engine and makes very cold day starting smooth. That may be enough, I have a qjet on my dodge 318 with iron intake and open crossover which starts and runs fine after warm up on those silly cold days.

Frank400:
I personally never heard that exhaust passing under the intake could ruin the intake ?  GM have had quite a few engines over the years with aluminum intakes so I'm guessing if it would have been an issue or a possible issue, they just wouldn't have done it but I could be wrong.

  I have one of my cars with an aftermarket aluminum intake with the exhaust being not blocked, and it never crossed my mind this could be an issue.

   Frank.

429bbf:
I've run aluminum intake on my 385 fords for a number of years and pulled them of . there sooty but the intake is still nice . for what its worth i plugged one and will never do that again . you leave it sit at the parts store for 15 minutes on a cool day and it cools off so fast the choke comes on and takes a while for it to go off don't like it.

429bbf:
I'm at 5000 ft in northern wyoming

74 Powerwagon:
Hi 429, I'm guessing that northern Wyoming gets a bit cold in the winter, like well into the negatives. Were the intakes newer or were they 70's vintage. I wonder if alloys changed. Your direct experience is helpful, but Baddad has had a few corroded ones. I can adjust the choke easily enough stiffer in winter softer in summer. How easy or hard did the blocked off crossover engine start in winter. Thanks everyone for the input. 

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