Guess you don't know what a strawman is, because I am not making someone else's arguement into an easily knocked down extreme.
Alcohol as a fuel 4879Brent P Maybe its not what you intended, but from my chair that's exactly what you did. I pointed out that high...
No, that wasn't what I was doing. I explained it to scott too. The last sentance is an example of how extra power from a high CR doesn't translate into better MPG. A 14:1 CR 7liter V8 didn't get better fuel economy than the run of the mill lower compression 7 liter V8 of the time. I was not holding power output constant and that is very clear.
The extra power that makes the engine more thermally effiecent doesn't mean higher MPG. They are two different things and MPG has considerably more factors in play than the energy input over energy output.
Let's just vary what we are testing, CR. You have vary other things to hold power output constant. But regardless, in both cases it will always be more fuel efficient in terms of energy in over energy out. This may not be true in terms of MPG. The other alterations to the engine to hold power output the same or the extra power the higher CR engine produces may not result in greater MPG. There are too many other factors in MPG to say this.
