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Re: [GMCnet] Re: Tips/steps to take before removing intake manifold [message #367898 is a reply to message #367861] Thu, 09 December 2021 11:25 Go to previous messageGo to previous message
rgogan is currently offline  rgogan   United States
Messages: 82
Registered: February 2004
Location: Milwaukee, WI
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Jim,

Rest assured that my aluminum intake manifold was not purchased from Applied GMC.

I bought this many years ago from the Coop when they first became available. It might have been an early production model that hadn't been fine tuned. As far a I can tell, the Carb fitted the manifold well without any obstruction to the throttle plates.

When I had the carb rebuilt by Coop several years ago, it came with a new thick gasket to prevent boiling over from the intake manifold crossover heat. The engine actually had less power than before the rebuild of the carburetor. I finally found that that thick gasket was cut improperly and it was interfering with the secondary throttle plates from opening fully. After I trimmed this, my engine had like new power.

What is the carb mod on the intake manifold that you do? I am always looking for more power, if I neglected a machining error.

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