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Author Topic: Fuel Capacity/Range Questions..  (Read 1159 times)

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Offline joko

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Re: Fuel Capacity/Range Questions..
« Reply #15 on: November 17, 2020, 05:40:36 pm »
Many factors affect fuel mileage:

lower milage - - - -  - - - - higher milage
Riding against the wind - - - Riding with the wind
high temperature - - - - - - - Low temperature
riding downhill - - - - - - - - -riding uphill
riding in lower gears - - - - - riding in higher gears
Lots of traffic stops - - - - - - few or no traffic stops
riding at top speed - - - - - - riding slower in top gear
poor fuel quality  - - - - - - - high fuel quality
thicker engine oil - - - - - - -thinner engine oil
heavier rider & cargo - - - - lighter rider and cargo
lower tire pressure - - - - - -higher tire pressure
poor engine tune - - - - - - - good engine tune
aftermarket fuel manager - - no aftermarket fuel manager

just to name a few.

Those are obvious & don't help explain the difference between DelawarePete & Joko's mileage.


With all my gear and laptop and everthing I'm probably about 160 lbs or so.  I've got a mini fairing, most wind catches my just my helmet, 87 octane, and about half my commute is usually against the wind most days.  33f/36r psi.  Mobile 1 15/50 full synth.  No koso.  Only a few miles non freeway, Pete said he's got about 10 miles of local riding which could make a difference if you're hitting a lot of lights.  Did you monitor your mileage before the koso?  I would def think freeway miles would give you better gas mileage. 

Online DrM

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Re: Fuel Capacity/Range Questions..
« Reply #16 on: November 17, 2020, 07:42:32 pm »
Many factors affect fuel mileage:

lower milage - - - -  - - - - higher milage
Riding against the wind - - - Riding with the wind
high temperature - - - - - - - Low temperature
riding downhill - - - - - - - - -riding uphill
riding in lower gears - - - - - riding in higher gears
Lots of traffic stops - - - - - - few or no traffic stops
riding at top speed - - - - - - riding slower in top gear
poor fuel quality  - - - - - - - high fuel quality
thicker engine oil - - - - - - -thinner engine oil
heavier rider & cargo - - - - lighter rider and cargo
lower tire pressure - - - - - -higher tire pressure
poor engine tune - - - - - - - good engine tune
aftermarket fuel manager - - no aftermarket fuel manager

just to name a few.

Those are obvious & don't help explain the difference between DelawarePete & Joko's mileage.
Here are some more:
 - Lower Mileage - - - - - - - - Higher mileage
dirty air filter - - - - - - - -- - - - clean air filter
worn tire tread - - - - - - - - - - - new tire tread
big windshield - - - - - - - - - - - small windshield
heavy throttle hand - - - - - - -  light throttle hand

They are not just additive but can be interactive.  Some of them you can't do anything about, but most of them can be addressed by the rider.  But if you think none of these are important, then I could see why you might be getting poor gas mileage.

This reminds me of a time in Saudi Arabia when I used to drive petal-to-the-metal (around 100 mph) in a new chevy impala from King Khalid Military City down to Riyadh.  Starting with a full tank of gas I would only get halfway (to Buraydah) before having to refill the tank.  But if I took my time and drove normally (50 or 60 mph) I could get all the way to Riyadh on a single tank of gas.  Now that is one hell of a difference in milage - over 50% difference.

Offline Smolka

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Re: Fuel Capacity/Range Questions..
« Reply #17 on: November 18, 2020, 12:37:54 am »
For reference (if anyone cares) I just purchased a 2014 Bolt with Vance & Hines pipes, exhaust and fuel meter and my low fuel light comes on at 81-86. 87 Octane and sitting at 70-75 on the freeway.

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Offline lunkhead

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Re: Fuel Capacity/Range Questions..
« Reply #18 on: November 18, 2020, 01:29:13 am »
The stock airbox takes in air that's >15*F warmer than an open filter. So, to maintain any given cruising speed, the throttle plates will be open more which reduces pumping losses. Also, slightly more fuel gets vaporized due to the extra heat so the fuel burns more completely in the combustion chamber.

At high altitudes, the rarefied air also requires a wider (less restrictive) throttle opening to maintain the same lower altitude speed. Air resistance against the bike and rider is also less and a lower octane can be used because dynamic cylinder compression goes down. It's said there's about a 10% increase in fuel efficiency at 10,000'.
C-SPƎC

Offline DelawarePete

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Re: Fuel Capacity/Range Questions..
« Reply #19 on: November 18, 2020, 11:02:04 am »
100% disclosure....I ride like a total asshole most of the time.  I always accelerate like I'm trying to win the hole shot at every light.  My setup is Big Air Kit open air cleaner, VH Comp Exhaust, Cobra FI2000.  I'm one of the first people to have the KOSO, and my shit is locked in.  My bike also has to move more mass than Joko.  He's fully loaded at 160lbs, that was my fighting weight in 1993.  I'm 5'9" and about 215lbs (most of it in my testes), plus I have the fairing, saddlebags, and I live in Delaware, right at sea level, and it's flatter than most of my dad jokes. 

There was ONE night I rode home in a storm for the entire 100 mile trip. I went the speed limit the entire way, like a little bitch.  My fuel light came on at 128 miles.  That's 53 MPG.  So I'm sure if I rode my bike like a tool and went the speed limit everywhere, everyday, I would spend less on gas.  Regardless I'm going to have to fill up before I go to work AND on my way home.  And it's like 5 bucks to fill up so who cares?   
Grow a beard

Online Sdaniels

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Re: Fuel Capacity/Range Questions..
« Reply #20 on: November 18, 2020, 04:44:36 pm »
Okay, so Joko behaves on the bike & Pete is a hooligan.  That's where I'm betting most of the mileage variance comes from.  I did monitor the mileage before the Koso...didn't notice any changes.  I run 35F, 37R tire pressures & weigh in at around 210 with gear.  I get about 105 miles before the light comes on, with a few instances slightly higher/lower.  I got Ivans flash after putting on the K&N cleaner (not the round one) & the Danmoto slipon.  I think the plugs show slightly richer but that could be just in my head.  The only reason I questioned  this is because the first trip I made, I didn't think anything when the fuel light came on because I was about 18 miles out & thought there was plenty of reserve to get me home...then the dreaded sensation of running out of fuel happened.  I keep the clock function on the Koso.  When I cycled through to the trip meter it showed reserve came on at 90 miles.  I would have known something was up if I saw that mileage.  It's all good.  LIke you said Pete, gas is cheap at the moment.  Still wondering about the Stryker pulley.  Can't find any posts about gas mileage increase with the swap.
2015 C-spec