Quote:
Originally Posted by amcmike
Actually it is, and today's OEMs do.
Modern engines use much higher compression ratios, enabled by direct injection. The higher SCR increases efficiency even at part throttle, thus increasing fuel economy (in addition to increasing torque under wide open throttle). They can get away with these compression ratios due to the charge cooling as the fuel is injected directly into the combustion chamber (especially with multiple injection strategy at under medium loads and low-mid rpm). This then allows them to downsize the engine displacement (if desired) to further improve fuel economy. This is why OEMs use DI even on small economy cars, not just performance vehicles.
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While true on modern cars, The 60's and 70's and most of the 80's were built based on Torque And were built to run on the highway just below their torque peak in most cases, for passing power, and economy.
Would be interesting if ANYBODY started Dyno mapping at 1500 instead of 3K .
My Point is that some things were designed well, and do the job.. well....