Inliners International Forums General Discussion Engines Low CFM 4 barrel carb options?

Our 240 Ford with a Holley works best (no stumble) with #37 shooters.

Ported signal vacuum works better as far as eliminating stumble than straight manifold vacuum.

If your carb does not have a ported connection you can "band aid" the problem by installing a Ford Spark Delay Valve (SDV)in the vacuum line. These come in various restrictor sizes and are color coded by bleed-off time.