Thread: Carb Spacer
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Old 10-11-2019, 08:03 PM   #8
drolston
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Join Date: Jun 2014
Location: Williamsburg, VA
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Default Re: Carb Spacer

Most vapor lock occurs from alcohol boiling in the fuel pump, because the metal pump is mounted close to the engine block with only a very thin gasket, and is in the back, partially shielded from cooling air. The fuel bowl in the carburetor may boil a bit after you shut down, as heat from the block conducts up to the carb. I use a phenolic spacer about half an inch thick to slow that conduction. All the V8 parts guys sell those spacers. The carb stays relatively cool when running because it has a constant stream of air running through it and through the manifold upon which it is mounted.
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