Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

trebuchet03 · 04-01-2008, 10:02 PM

1. It won't increase thermal efficiency - so if you're putting energy into a FW, it's not going to make running the engine any more efficient
2. At steady state - there's no difference
3. You can shift earlier without dropping rpm as much
4. You'll be able to go further while engine braking

So for 3 and 4, I don't see that big of benefit... If you're going to coast, EOC or throw it in neutral.... I don't see 3 as a big deal - 99% of the time you'll be in or out of gear, not shifting...

For 4, you can get the same benefit by adding dead weight to your car...

If the FW can be disengaged while not "charging" or "discharging" that energy... That would be beneficial for city driving

04-01-2008, 10:02 PM	#4 (permalink)
trebuchet03 MechE Join Date: Dec 2007 Location: Bay Area Posts: 1,151 The Miata - '01 Mazda MX-5 Miata Thanks: 0 Thanked 21 Times in 18 Posts	1. It won't increase thermal efficiency - so if you're putting energy into a FW, it's not going to make running the engine any more efficient 2. At steady state - there's no difference 3. You can shift earlier without dropping rpm as much 4. You'll be able to go further while engine braking So for 3 and 4, I don't see that big of benefit... If you're going to coast, EOC or throw it in neutral.... I don't see 3 as a big deal - 99% of the time you'll be in or out of gear, not shifting... For 4, you can get the same benefit by adding dead weight to your car... If the FW can be disengaged while not "charging" or "discharging" that energy... That would be beneficial for city driving __________________ Cars have not created a new problem. They merely made more urgent the necessity to solve existing ones.