View Single Post
Old 10-11-2013, 05:28 PM   #5 (permalink)
ever_green
Master EcoModder
 
ever_green's Avatar
 
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
time was taken into account. One thing noted was past ~2/3 manifold pressure (%66) the amount of increase in acceleration was insignificant assuming shifts were at same RPM. i will post some time logs later when i get home. car is automatic but the triptronic system was used to shift at desired RPM.

UPDATE ---

I can't find the numbers for the load testing under 2500rpm, but here are the numbers for when the car is left in fully automatic D (drive).

RPM--MPG--Load--Acceleration
1800--23.5-60--- 38s
2500--22---70---36
3000--22---80---34
4000--19.1--95-- 32

I have also been advised by several subaru members that variable valve lift system could play a role in improving swirl (BSFC) at low RPM and moderate loads. I'm not sure how this works but it's apparently very similar to honda's 3-cylinder vtec engine, where it has multiple sweet spots along the powerband (1500-4000rpm).

MORE DATA ---
to 60kmh and coast to end of 350m runway:
8.1lhk ~2200rpm 39s 65% Drive
9.4lhk ~2200rpm 40s 65% tiptronic
9.1lhk ~2500rpm 43s 70% tiptronic
11.8hjk ~3600rpm 36s 90% tiptronic
10.1lhk ~3600rpm 40s 80% tiptronic

0 to 70km/h
60% 18.1lhk 20s ~2000rpm
70% 23.2lhk 16s ~2200rpm -> 28% more fuel vs. 60%load but only 20% faster
85% 35.7lhk 11s ~2500rpm -> 53% more fuel vs 70%load but only 40% faster
__________________

Last edited by ever_green; 10-12-2013 at 08:08 PM..
  Reply With Quote