Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - lower final drive mod

ever_green · 10-10-2013, 04:46 PM

some raw data I collected today vs. Baseline:

Cruising:

consumption---Speed---BASELINE
5.6L/100km 40mph
6.0L/100km 45mph
6.6L/100km 50mph
7/100km 55mph
7.2L/100km 60mph
7.4L/100km 65mph
7.6L/100km 70mph
8.0L/100km 75mph
8.3L/100km 80mph

consumption---Speed---CURRENT
5.2L/100km 40mph
5.8L/100km 45mph
6.4L/100km 50mph
6.8/100km 55mph
7.1L/100km 60mph
7.3L/100km 65mph
7.6L/100km 70mph
7.8L/100km 75mph
8.0L/100km 80mph

Acceleration:

In order of Worst TO Best:

CURRENT:
consumption---LOD------RPM
12.7L/100km....95% ....~3500rpm
12.3L/100km....100% ....~4000rpm
11.2L/100km....70% ....~2500rpm
11.0L/100km....95% ....~2500rpm
11/0L/100km....80% ....~2500rpm
10.7L/100km....80% ....~3000rpm
10.7L/100km....70%....~2500rpm
10L L/100km....60% ....~2000rpm

BASELINE:

Run....Load(%).....Shifts(RPM)...Consumption(L/100km)...Acceleration Time(s)...

A.........WOT.............5500RPM...........15.8L. 100km
B.......+90%.............3000rpm............13.3L/100km
C.........80%.............2300rpm............12.3L/100km
D.........60%.............1800rpm.............12.1 L/100km
E.........80%.............2300rpm.............12.0
F.........80%.............2500rpm............12L/100km
G.........90%.............3000RPM............11.9L/100km
H.........90%.............3000rpm.............11.9
I..........60%.............1800RPM............11.5 L/100km
J..........60%.............1800rpm.............11. 5

so lower final drive definitely helps. also looks like 60% load is still the king at 2000rpm...it's very difficult to do engine lugging with such short gears and I also don't want to damage the powerplant. Also there is not much torque below 2000rpm in this boxer oversquare engine:

http://ecomodder.com/wiki/images/d/d...-ej22-bsfc.png

10-10-2013, 04:46 PM	#18 (permalink)
ever_green Master EcoModder Join Date: May 2011 Location: Toronto Posts: 264 gueff - '19 Mercedes Benz A250 4MATIC AMG 90 day: 30.55 mpg (US) Thanks: 8 Thanked 79 Times in 33 Posts	some raw data I collected today vs. Baseline: Cruising: consumption---Speed---BASELINE 5.6L/100km 40mph 6.0L/100km 45mph 6.6L/100km 50mph 7/100km 55mph 7.2L/100km 60mph 7.4L/100km 65mph 7.6L/100km 70mph 8.0L/100km 75mph 8.3L/100km 80mph consumption---Speed---CURRENT 5.2L/100km 40mph 5.8L/100km 45mph 6.4L/100km 50mph 6.8/100km 55mph 7.1L/100km 60mph 7.3L/100km 65mph 7.6L/100km 70mph 7.8L/100km 75mph 8.0L/100km 80mph Acceleration: In order of Worst TO Best: CURRENT: consumption---LOD------RPM 12.7L/100km....95% ....~3500rpm 12.3L/100km....100% ....~4000rpm 11.2L/100km....70% ....~2500rpm 11.0L/100km....95% ....~2500rpm 11/0L/100km....80% ....~2500rpm 10.7L/100km....80% ....~3000rpm 10.7L/100km....70%....~2500rpm 10L L/100km....60% ....~2000rpm BASELINE: Run....Load(%).....Shifts(RPM)...Consumption(L/100km)...Acceleration Time(s)... A.........WOT.............5500RPM...........15.8L. 100km B.......+90%.............3000rpm............13.3L/100km C.........80%.............2300rpm............12.3L/100km D.........60%.............1800rpm.............12.1 L/100km E.........80%.............2300rpm.............12.0 F.........80%.............2500rpm............12L/100km G.........90%.............3000RPM............11.9L/100km H.........90%.............3000rpm.............11.9 I..........60%.............1800RPM............11.5 L/100km J..........60%.............1800rpm.............11. 5 so lower final drive definitely helps. also looks like 60% load is still the king at 2000rpm...it's very difficult to do engine lugging with such short gears and I also don't want to damage the powerplant. Also there is not much torque below 2000rpm in this boxer oversquare engine: http://ecomodder.com/wiki/images/d/d...-ej22-bsfc.png __________________ Last edited by ever_green; 10-10-2013 at 05:36 PM..