To get more FE...drive faster?

[omgwtfbyobbq]

Could be... But not according to every singe BSFC map I've ever seen. I've never seen an engine geared properly that will increase efficiency by 30% if it's already near or greater than half load and minimal BSFC. Course, it could be that Honda designed a weird engine unlike any other engine, but if I had to pick between that and a lack of consistent testing on your behalf, I'm sure you can guess which one I'd pick.

[mrmad]

Originally Posted by omgwtfbyobbq

Could be... But not according to every singe BSFC map I've ever seen. I've never seen an engine geared properly that will increase efficiency by 30% if it's already near or greater than half load and minimal BSFC. Course, it could be that Honda designed a weird engine unlike any other engine, but if I had to pick between that and a lack of consistent testing on your behalf, I'm sure you can guess which one I'd pick.

I'm not sure why you are implying I have a lack of consistent testing. I only drive my CRX on my commute and drive my Integra on the weekends so for 99% of my driving, the car is driven on the exact same route, every day, same amount of hwy/city (I'm guessing about 70/30) driving. In my gas log below, arrow A is where I started using the same gas pump at the same station. From this point on, you can see that my mileage, though not wonderful for a CRX HF, is pretty consistent. From Arrow A to Arrow B I would try to shift below 2000rpm and keep the fwy speed below 65. From arrow B on, I'm shifting between 2500 and 3000rpm and the freeway speed between 75 and 80. Before I changed the speed shift points there's 1430 miles/32.88 gallons for an average of 43.46mpg and after I raised the speed there's 3588 miles/81.09 gallons for an average of 43.97mpg.

I have not changed anything in the car.

This is real world driving, averaged over sevaral hundred miles, unless you put the car on a test track with alot of instrumentation, I don't see how I'm going to get alot more consistent. To me, the numbers don't lie, I'm getting about the same mileage after increasing the speed.

[omgwtfbyobbq]

Originally Posted by mrmad

This is real world driving, averaged over sevaral hundred miles, unless you put the car on a test track with alot of instrumentation, I don't see how I'm going to get alot more consistent. To me, the numbers don't lie, I'm getting about the same mileage after increasing the speed.

You need a SG or SM, a deserted section of road, a bunch fo runs, and consistent weather to do an accurate comparison. Traffic alone can screw with a test in a ton of ways, not to mention any changes in weather, fill ups, etc... If you're trying to compare tanks while commuting it's nearly unpossible to do so in an accurate matter. Especially if you're a typical CA driver...

[mrmad]

Originally Posted by omgwtfbyobbq

You need a SG or SM, a deserted section of road, a bunch fo runs, and consistent weather to do an accurate comparison. Traffic alone can screw with a test in a ton of ways, not to mention any changes in weather, fill ups, etc... If you're trying to compare tanks while commuting it's nearly unpossible to do so in an accurate matter. Especially if you're a typical CA driver...

I would would agree with you on one or two gas tanks, but I think I have enough miles at each speed to average out the weather/fillups/traffic etc to show if the mileage were worse at the higher speeds I would see it.