04-09-2015, 03:12 PM
|
#1 (permalink)
|
Master EcoModder
Join Date: Mar 2010
Location: london, on
Posts: 355
Buggie - '01 Vw Beetle TDI Gls
Thanks: 4
Thanked 37 Times in 27 Posts
|
4 banger vs twins
If twins offer greater low end torque than their 4 banger cousin, being more street friendly would they get better mpg? I'm looking at the early 2000s suzuki gs 550 parallel twin vs bandit 650 4 banger vs the sv650 v twin. Ideally id like a 500 or 550 but seems to be a rare find to get a decent one some kid hasn't pimped out. Or, would a high horsepower 650-4 not need to work at low rpm and not matter anyways?
My last 2 bikes were a suzuki dr200 and dr650, the 200 one sipped fuel to the point of being ridiculous and the other got 5L/100km which is somewhere over 45 mpg
|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
04-09-2015, 03:31 PM
|
#2 (permalink)
|
Master EcoModder
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,024 Times in 1,304 Posts
|
My 89 GS 500 e was good for a little over 60 mpg.
regards
mech
|
|
|
04-09-2015, 04:54 PM
|
#3 (permalink)
|
(:
Join Date: Jan 2008
Location: up north
Posts: 12,762
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
|
On all my bikes, more cylinders = less fe.
|
|
|
04-09-2015, 05:24 PM
|
#4 (permalink)
|
.........................
Join Date: Aug 2009
Location: Buckley, WA
Posts: 1,597
Thanks: 391
Thanked 488 Times in 316 Posts
|
When riding efficiently, I got the same mileage on my 2001 ZX6R Ninja (carbed inline 4, ~100hp) as my current Ninja 650R (EFI inline twin, ~65hp). Both get about 50-55mpg.
When not riding efficiently, the ZX6R would get ~35mpg vs 45mpg for the 650R.
I also had a Suzuki Katana 600 (also a carbed inline 4) that got about the same mileage as the 650R.
I think there are too many other variables with motorcycles to worry too much about the number of cylinders for fuel economy reasons.
|
|
|
04-09-2015, 08:55 PM
|
#5 (permalink)
|
Master EcoModder
Join Date: Mar 2010
Location: london, on
Posts: 355
Buggie - '01 Vw Beetle TDI Gls
Thanks: 4
Thanked 37 Times in 27 Posts
|
Bought an 07 gs 500f nakedised bike. 13000 miles. Stock exhaust big selling feature. I think a bigger front sprocket might be in order at some point
|
|
|
04-09-2015, 09:50 PM
|
#6 (permalink)
|
Master EcoModder
Join Date: Sep 2009
Posts: 5,927
Thanks: 877
Thanked 2,024 Times in 1,304 Posts
|
My GS 500E has been off the road for over a year since I got my GZ250.
regards
mech
|
|
|
The Following User Says Thank You to user removed For This Useful Post:
|
|
04-10-2015, 12:14 PM
|
#7 (permalink)
|
EcoModding Apprentice
Join Date: Apr 2011
Location: Canyon Lake, Texas
Posts: 222
none - '98 Honda Civic HX none - '00 Chevy (Geo) Metro base none - '00 Saturn SL1 base
Thanks: 126
Thanked 77 Times in 50 Posts
|
1981 Suzuki GS1100 54 mpg cruising hwy (aftermarket racing fairing) 70mph. Got better mpg than my brothers 1980 Kawasaki 550.
|
|
|
04-10-2015, 04:34 PM
|
#8 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,873
Thanks: 0
Thanked 1,684 Times in 1,502 Posts
|
Sure the rider and gearing play an important role on that matter, but a 2-cyl is still a more sensible option regarding fuel-savings compared to a 4-cyl.
|
|
|
04-11-2015, 08:05 PM
|
#9 (permalink)
|
Master EcoModder
Join Date: Feb 2010
Location: Elmira, NY
Posts: 1,789
Thanks: 320
Thanked 357 Times in 298 Posts
|
The biggest efficiency factor is compression ratio, the higher the better from a thermodynamic perspective. Next is the rate of flow of air/fuel mixture as in cc/min. A longer stroke, under square, tends to have more torque due in part to crank offset. Most 4 bangers are designed to get their power at high rpm so stroke and piston mass are kept minimal. Compare this to an industrial engine. Reduced aero drag and weight means less power is required so less fuel is burned. So build a full fairing, maybe lose a few pounds, and consider converting your ride to diesel power or a turbo system.
|
|
|
04-12-2015, 02:07 AM
|
#10 (permalink)
|
It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,873
Thanks: 0
Thanked 1,684 Times in 1,502 Posts
|
Quote:
Originally Posted by Grant-53
The biggest efficiency factor is compression ratio, the higher the better from a thermodynamic perspective. Next is the rate of flow of air/fuel mixture as in cc/min.
|
At a certain point, pumping losses start to offset the benefits of a high compression ratio.
|
|
|
|