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suspectnumber961 · 04-24-2011, 08:20 AM

So here is the BSFC for the 2.0L Zetec engine...an earlier version than mine...but about as close as I'm going to get.

Conclusions?

* looks like ~2000 rpm is most efficient...or where to expect best mpg...though the useful range is probably from 1500 to 2500?

* I have an auto...so it might be hard to keep it in the most efficient area as far as rpm vs LOD?

In real world driving maybe 1700 to 2300 might be most efficient? Which is where I typically drive it. I also run around 45-50 mph most of the time....which puts it in this efficient range in OD.

Gonna be hard to get it into the 120-140 Brake Torque area.....car will go into open loop with some encouragement....

Not really seeing any way to improve driving technique...maybe putting it in neutral when coasting up to stop signs?

Supposedly...higher LOD is more efficient (discounting drivetrain losses?)...meaning I COULD run it up to speed at 2500 rpm and then cruise with a light foot?

Here is a conversion chart for NMs vs LOD...BSFC chart is for another engine....

So most efficient would be 75-85 LOD....but in the real world anything above 50 LOD (up to 85 LOD) and under 2500 rpm would be in the sweet spot???

04-24-2011, 08:20 AM	#6 (permalink)
suspectnumber961 EcoModding Alien Observer Join Date: Mar 2008 Location: I flitter here and there Posts: 547 highcountryexplorer - '86 Nissan 720 KC 4x4 ST with fiberglass cap 90 day: 21.78 mpg (US) Elroy - '03 Ford Focus ZX3 w/Zetec DOHC engine 90 day: 32.89 mpg (US) Thanks: 6 Thanked 78 Times in 65 Posts	So here is the BSFC for the 2.0L Zetec engine...an earlier version than mine...but about as close as I'm going to get. Conclusions? * looks like ~2000 rpm is most efficient...or where to expect best mpg...though the useful range is probably from 1500 to 2500? * I have an auto...so it might be hard to keep it in the most efficient area as far as rpm vs LOD? In real world driving maybe 1700 to 2300 might be most efficient? Which is where I typically drive it. I also run around 45-50 mph most of the time....which puts it in this efficient range in OD. Gonna be hard to get it into the 120-140 Brake Torque area.....car will go into open loop with some encouragement.... Not really seeing any way to improve driving technique...maybe putting it in neutral when coasting up to stop signs? Supposedly...higher LOD is more efficient (discounting drivetrain losses?)...meaning I COULD run it up to speed at 2500 rpm and then cruise with a light foot? Here is a conversion chart for NMs vs LOD...BSFC chart is for another engine.... *So most efficient* would be 75-85 LOD....but in the real world anything above 50 LOD (up to 85 LOD) and under 2500 rpm would be in the sweet spot??? __________________ Carry on humans...we are extremely proud of you.** .................. Forty-six percent of Americans believe in the creationist view that God created humans in their present form at one time within the last 10,000 years. GALLUP POLL Last edited by suspectnumber961; 04-24-2011 at 08:26 AM..