Go Back   EcoModder Forum > EcoModding > Motorcycles / Scooters
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-28-2013, 11:50 AM   #21 (permalink)
EcoModding Lurker
 
Join Date: Aug 2009
Location: Tucson
Posts: 14

MPG_plusNinja - '08 Kawasaki Ninja 250
90 day: 99.67 mpg (US)
Thanks: 0
Thanked 3 Times in 2 Posts
Fuel log issues

I noticed that the option to import using cut and paste does not work, at least for me on my computer using firefox or MS explorer. Also the lifetime average and the three last tanks and last 90 days is off by a few miles per gallon. When shooting for triple digits this make a difference to me. The current mileage is fine and each of the individual data points. I can't see entering a bunch of previous data until that is fixed.


__________________
CRX 2 year average 53 mpg
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-06-2013, 01:31 AM   #22 (permalink)
EcoModding Lurker
 
Honda100's Avatar
 
Join Date: Oct 2012
Location: SE Asia
Posts: 74

MetroScoopy - '09 CHF50 Honda Metropolitan 50cc
90 day: 97.98 mpg (US)

Training Shoe - '99 Hyundai Hyundai Atoz Prime 797cc
90 day: 31.28 mpg (US)
Thanks: 1
Thanked 4 Times in 4 Posts
250 Nighthawk gets around 71-80 mpg for me, very soft cruising. 55-67 ish when getting on it.
__________________
1988 Honda Super Cub 50cc
  Reply With Quote
Old 12-09-2013, 09:46 AM   #23 (permalink)
Master EcoModder
 
P-hack's Avatar
 
Join Date: Oct 2012
Location: USA
Posts: 1,408

awesomer - '04 Toyota prius
Thanks: 102
Thanked 249 Times in 201 Posts
most of my riding is around town, so less aero penalty. P&g helps me get into triple digit mpgs on small bikes. My v65 sabre is just a pig no matter how you drive it. But per the OP, hiway is going to see reduced returns certainly (excepting large hills)
  Reply With Quote
Old 12-09-2013, 10:38 AM   #24 (permalink)
Master EcoModder
 
Join Date: Jul 2011
Location: WI
Posts: 473
Thanks: 157
Thanked 77 Times in 55 Posts
I guess I haven't chimed-in on this thread yet, so to answer the initial question -

My 2006 Suzuki SV650 N (F.I., no fairing) that's geared-up 1T on the countershaft gets about 55 MPG on the Interstate at 70-75 MPH. Best its done is 62 MPG during some moderate back road riding in the 50-70 MPH range.

That's on ethanol-free 87 octane.

I don't P&G with it, as it's a V-Twin and slows immediately/drastically when you roll off the throttle. It will return 50 MPG in town also, using moderately quick acceleration then a smooth cruise at lower RPMs with minimal throttle opening.
  Reply With Quote
Old 12-16-2013, 12:11 AM   #25 (permalink)
Master EcoModder
 
alvaro84's Avatar
 
Join Date: Jul 2010
Location: Fehérvárcsurgó, Hungary
Posts: 384

Teresa - '04 BMW F650CS
Motorcycle
90 day: 80.53 mpg (US)

The YARDIS - '99 Toyota Yaris 1.0
90 day: 59.52 mpg (US)
Thanks: 4
Thanked 11 Times in 10 Posts
Quote:
Originally Posted by jkv357 View Post
I don't P&G with it, as it's a V-Twin and slows immediately/drastically when you roll off the throttle.
Haven't you forgotten about something? Like the clutch lever
  Reply With Quote
Old 12-16-2013, 11:42 AM   #26 (permalink)
Master EcoModder
 
Join Date: Jul 2011
Location: WI
Posts: 473
Thanks: 157
Thanked 77 Times in 55 Posts
Quote:
Originally Posted by alvaro84 View Post
Haven't you forgotten about something? Like the clutch lever
Nope.

I don't coast with the clutch in on a cycle.
  Reply With Quote
Old 12-16-2013, 12:38 PM   #27 (permalink)
Master EcoModder
 
P-hack's Avatar
 
Join Date: Oct 2012
Location: USA
Posts: 1,408

awesomer - '04 Toyota prius
Thanks: 102
Thanked 249 Times in 201 Posts
I would say Yes. It isn't G (as in P&G) if you aren't in neutral or holding the clutch in. You are engine braking which is still braking.
  Reply With Quote
Old 12-18-2013, 03:48 PM   #28 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 762

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)

Beemer - '06 BMW F800 ST
90 day: 53.06 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
With my car, I don't P&G anymore because since it is able to cut off fuel when pedal is depressed, it seems more rewarding.

No use on carbed engine obviously
__________________
  Reply With Quote
Old 01-17-2014, 11:56 PM   #29 (permalink)
Master EcoModder
 
Join Date: Jan 2012
Location: United States
Posts: 1,435

spyder2 - '00 Toyota MR2 Spyder
Thanks: 89
Thanked 267 Times in 204 Posts
Quote:
Originally Posted by stillsearching View Post
Most of all I would LOVE to have SFC figures for modern bikes. For instance on cars it's pretty much a given that they'll be the most efficient fuel use, per HP used, maybe around 2000rpm or so. At 1000rpm it will suck. At 5000rpm it will suck. But bikes have such an incredibly wide range, like the Ninja 250 with what, 13,000rpm redline?? I don't know where the ideal part of the curve is for such an engine. I would like to have something with enough power and gear, to put it in that sweet spot of the curve for 55-75mph range approximately. If a 500 is more efficient putting out a 15-20hp load than a 250 is (being run too hard) the 500 will probably get better mileage under those conditions - this i've finally understood.
Bikes have no variable valve timing, so there is considerable (undesirable) EGR at lower loads for quite a chunk of the rev range, and this is probably the main thing that robs efficiency. In car engines the low rpm combustion characteristics are better, but the proportion of friction power increases a lot faster. Looking at a dyno chart of a CBR600RR, the torque seems to pick up a lot at 3000, going to 30 lb-ft or ~45Nm by 4000rpm, and 75Nm/L is around what "Atkinson cycle" engines with a similar intake valve closing point pump out, which is a good sign. So maybe like 4000-7000 is a decently efficient range for applying heavy throttle and you could get away with cruising at 3000 efficiently. For other bikes maybe try to observe where the torque has a similar steep ascent, that probably indicates combustion efficiency picking up. I would guess that it scales mostly with the stroke, since bike engines tend to be designed with the highest possible rev limit and are given cams to suit, though obviously an FZR600 that's basically a detuned R6 probably will be efficient at a considerably lower rpm.
  Reply With Quote
Old 01-18-2014, 04:03 PM   #30 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 762

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)

Beemer - '06 BMW F800 ST
90 day: 53.06 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
A FZR600 as detuned as it is, is still with a very high peak torque rpm required for its 170 hp per litre (100hp variant) or 130 HP per litre in the 79hp version ...

The more I think about it, the more I believe peaky engines are better for bikes because it will be less prone to rear wheel lock on throttle closing.

__________________
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com