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Hence, a well-prepped 340 will usually outrun an equally well-prepped 350 chevy, and many people will wonder why. Well, THIS IS WHY.




I would think that the overall design (Chamber and port design) of the cylinder head itself would also play a major role in this equation (V8440's quote above.). It would be interesting to put both classes of motor together at the same ci. of displacement and best iron oem production head design and see where each stood. Of course I think that keeping the intake, carb and camshaft duration the same would help with a true comparison; no? For example 355 ci., 9.5:1, Vortec heads (for Chevy) and Magnum (Chysler), hyd. flat tappit 230@.050, dual plane intake, 750 cfm vac. sec carb., standard oem ratio rockers. It would be a neat comparison. With that being said I am not convinced that I would want to put my money either way. Let the flaming begin. Cheers !!!

Big Jimmy