Sorry I have created such a fire storm about the 4200.
I only touched on the edge of the faults that I perceive of the engine, Why did't GM keep the original design that won Pikes Peak and Baha? Money, marketing, for sure not engineers.
I myself think the flathead combustion chamber design is one of the best and could be one of the most fuel efficient engines, if you want swirl and tumble with low ignition timing .
I don't follow the crowd, I like to think outside the box.
Again sorry for ruffling everyone's feathers!
