I have an AMC 258 bored to 267. Has a turbocharger off a Carburated Buick turbo V6. I fabricated a plenum to bolt to inlet of turbo that takes a 4 bbl carb. I get an engine hesitation under light acceleration. Goes away under heavy acceleration. Cannot tune hesitation away with timing or jetting. I wonder if carb is too big, 500 cfm Edelbrock, or do I need to make a water jacket to heat plenum under carb. A smaller version of this setup with a S&S Harley carb had instant response. With no manifold heat . Any ideas. Mike
