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Exhaust Manifold
I've been considering a somewhat custom build for a while now, as no manufacturer I know of makes tandem-seating or cars that are substantially lower than my Del Sol.
As I pieced together the chassis and frame, to make the car shorter I am considering rotating the B16(or D16) series engine and laying it down flat. In that configuration the air would come in from the top and the exhaust should go out the bottom. But the heads, or crowns or whatever, would be facing the rear of the car anyway(to keep the engine as close to the center of stiffness) and with a little work the exhaust could travel in straight line out of the cylinder and down the pipes.
Obviously there would be slight pumping gains because the gases no longer have to turn in any substantial fashion from header to muffler, but is it worth it?
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