I know plastik intake manifolds function, but real metal intake manifolds are better, to me. Can you imagine how far you could spread the torque plateau by exaggerating the long runners of that manifold by another six to twelve inches or so, and leaving the short runners as they are? The manifold would have to be cast with a far taller upside-down U-shape to the lower-RPM runners, which would look so aggressive. Only about three to six inches of additional height needed! Such a thing may even make up for any low-RPM anemic behavior influence brought about by a huge, lumpy cam holding the valves open like the front door of a Wal Mart the moment Black Friday starts in addition to providing an even bigger, taller hump over the engine. One may even be able to utilize a larger long-runner cross section, also! In FACT, if you want, you can increase the plenum size, too, and put in much wider short runners to REALLY scream at high RPM! It would be so easy to mock up with some plastic tubing for testing purposes to ascertain the best cross sections/tapers/shapes/lengths for all the ports. The more aggressive could just saw the manifold along the plane parallel to the crank centerline, and put in a piece that adapted the runners to a plate on top and bottom sections that one could swap in different lengths and diameters of tubing to test out. Who knows? One may be able to have a similar effect as the Holley Sky Ram for half the height! Evidently, it is hard to do a too-short intake path for high RPM, so the more cavernous plenum idea may help by eating into the intake runner lengths, also, shortening the path from plenum to valve seats even further! Could it be that amazingly long runners could partially negate the problems of reversion caused by super-long-overlap 300-degree cams that one could choose for ultra-high RPM?
