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Old 03-22-2012, 12:34 PM   #151
RallyColtTurbo
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Location: Lake Elsinore, CA
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Three Gen 1 Legacy Turbos

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There are no simple engines these days, Some may appear simple and have lower parts counts, but every one has more hours of engineering into it than I have in my lifespan.

The tech is all in the subsytems, piston/chamber design, Bearing surfaces, material composition. Injectors, sensors, ECUs. Thermodynamic research. Even chemical research.

Don't fool yourselves into calling a LS series motor or a plain jane Focus motor simple. As much engineering goes into those as any Ferrari V8 or Porsche motor. It just manifests differently with different goals.

Also keep in mind that the actual combustion is getting more efficient, so mechcnical losses are back in focus again. Things like the fact that fewer, smaller bores have less friction (rings/piston-to-wall) than larger ones. So all other things being equal, a small 4cylinder making 200 "internal" HP will "lose" less of it to friction (and inertia too) than a V6 making the same "internal" HP...So the V6 would use more fuel for the same "external" HP. All of that seems trivial to me, but I'm sure it's not to a manufacture making 100Ks of cars a year..

For the soapbox:
The enemy of MPG is, and always has been, weight. More efficient engines are helping, but weight is the root of all automotive evil. 1984 Honda CRX, 45MPG (IIRC), carburated motor, still yet to be matched by any non-hybrid gasoline powered car. Not that I want us all to drive old CRXs, but it illustrates that weight should be a bigger EPA target than forcing more efficient motors
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Old 03-22-2012, 05:58 PM   #152
FireMedic1343
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Quote:
Originally Posted by RallyColtTurbo View Post
...Not that I want us all to drive old CRXs, but it illustrates that weight should be a bigger EPA target than forcing more efficient motors
Lighter cars crashing into you in accidents would be nice as well...
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Old 03-22-2012, 06:26 PM   #153
HipToBeSquare
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NHTSA and IIHS can't be rendered moot and useless by rolling back the mass-inducing safety regulations that they have implemented.

Nevermind that they are in direct contradiction to EPA energy efficiency regulations, and at some point, additional safety-reg induced mass is self-defeating due to the laws of physics. that just makes too much sense for a bureaucrat to wrap their tiny little mind around.
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