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I learned something odd with this subject and a lower compression 1979 chevy pickup. the engine got bigger to weight, and it reminded me of a 1960s gas 5ton truck...also with strangely factory low compression.
if you have high compression, performance engine, it is a tinny versus a sledge hammer. the tinny smackers, need to play aero games, the workers do not. the cap can do two different things on the same truck, depending on drivetrain. My own experience with the older low compression was sqaure cap, lack of aerodynamics, just to keep the engine chugging a bit more..INTO efficient.. Most noticable starting with the larger v8s (5.7 liter and onward) the smaller the engine, the more it is straining through any weight, any compression, making it less noticable.
It is almost like a tractor trailer- they are the same loaded sqaure, unloaded, winged looking like a ricer...it is all the engine, the engine, the engine....
the more I see wings and aero, the more I know the engine sucks.
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