Fuel Tank mod, fuel pump stuff & my measured fuel tank/reserve capacity

[stevepsd]

It's OK Steve, No one is going to sue.

Thanks for doing all that to YOUR bike. I am sure that it will be within a few percent for anyone else.

By the way was that measured at standard temperature and pressure? ::025::

Funny, when I think back to my first bike, all I remember being "thingy" about was adjusting the points and checking the oil and keeping it clean.

Just rode it and filled it up when needed. I am sure that's what most of my friends did too. Same with the next bike.

The 'MY' comments were for those among us who have to pick at everything.... :-[

I hear ya about doing all of this kind of stuff.....back in the day I could really care less...spent more time wrenching to keep the bike(s) running than mucking around with this stuff.....Hey, maybe I found the problem. These new bikes are just to darn reliable and we have lot of spare time on our hands, but we still have this need to 'fix'!

Oh yeah, it was pretty close to 68F here the past 2 days, so how about that!

-steve

 

[Tremor38]

The 'MY' comments were for those among us who have to pick at everything.... :-[

Oh yeah, it was pretty close to 68F here the past 2 days, so how about that!

-steve

Well there's the problem. The test must be performed at 59 deg F @ sea level.... You were 10 deg. F above standard day, so obvously the tank expanded to the point where it could hold another 0.2 gal > > J/k

 

[GrahamD]

Well there's the problem. The test must be performed at 59 deg F @ sea level.... You were 10 deg. F above standard day, so obvously the tank expanded to the point where it could hold another 0.2 gal > > J/k

Sorry Steve but you'll have to go and do it all again.

Watch the weather, you also need 1000HPa atmospheric pressure as well.

It's a tough job being an engineer, but you started it.

It was a lot easier adjusting points wasn't it? ::025::

 

[Kevhunts]

::026::

Some wish to contribute in a positive way, others seem hell-bent on wanting to tear it apart.

Steve, I for one, appreciate your post and the pictures make it all the better!

 

[GrahamD]

Steve, I for one, appreciate your post and the pictures make it all the better!

Same here Steve, Just mucking around. ::008::

 

[stevepsd]

It was a lot easier adjusting points wasn't it? ::025::

I like points.......................

 

[stevepsd]

Well there's the problem. The test must be performed at 59 deg F @ sea level.... You were 10 deg. F above standard day, so obvously the tank expanded to the point where it could hold another 0.2 gal > > J/k

Well darn, guess I'll just go eat sand ::008::

Warning .....Engineer hat on.

Another aviation guy i suppose (join the club!)...however you are confusing a aviation Standard Day (59F) vs. Standard Conditions for Temp & Pressure (68F) which NIST the National Institute of Standards and Technology uses as a standard for experimental measurements - used to be the National Bureau of Standards.

Engineer hat off. My head hurts now. I'm on vacation. ::008::

Must ..........go............... ride............ ::012:: ::012:: ::012::

-steve

 

[tomatocity]

For the riders who are going to Punch Holes... how large are the holes you are going punch?

Many of the pumps in California can pump a lot of air into the tank so the punch holes should allow that air to easily escape.

 

[Tremor38]

Well darn, guess I'll just go eat sand ::008::

Warning .....Engineer hat on.

Another aviation guy i suppose (join the club!)...however you are confusing a aviation Standard Day (59F) vs. Standard Conditions for Temp & Pressure (68F) which NIST the National Institute of Standards and Technology uses as a standard for experimental measurements - used to be the National Bureau of Standards.

Engineer hat off. My head hurts now. I'm on vacation. ::008::

Must ..........go............... ride............ ::012:: ::012:: ::012::

-steve

Well if you'd rather stay grounded then yes, going for a ride is an excellent choice 8)

 

[colorider]

For the riders who are going to Punch Holes... how large are the holes you are going punch?

Many of the pumps in California can pump a lot of air into the tank so the punch holes should allow that air to easily escape.

I'm guessing 1/8" or thereabouts should work, although if I was tearing the tank down as Steve did, I would be removing that stupid sleeve.

 

[markjenn]

I finally was able to to a "run until dry" fuel capacity test on my S10. Although I carried a carefully measured amount of aux fuel on board to get me from the point where she quit to the nearest station, I was fortunate and the bike started sputtering about a 1/2 mile after passing a station. I was able to do a 180 and almost make it back to the station before she quit cold - I had to push her the last 50' to the pump. It showed 52.4 miles on the fuel reserve trip meter.

Filled on the center stand and "by the book" - the OM specifically says "Stop filling when the fuel reaches the bottom of the filler neck" - she took 5.754 gallons. After noting the fuel reading, I went ahead and spent about 3 minutes pulsing additional fuel in where you blip the nozzle to fill the filler neck, then wait until it drains down into the tank. By doing so, I was able to coax it up to 6.1 gallons. I happened to be at a non-vapor-recovery pump that was pretty friendly to this pulsing technique - many are not. If you do the mod of drilling the filler neck, then this gets easier. But anytime you fill this air space, you run the risk of overflow and there have been reports that for CA emissions bikes, overfilling can flood the vapor recovery canister causing problems.

Also, I've noted my bike typically takes 4.5 gallons if I fill it at the point it goes on reserve. So I estimate the reserve at 1.25 gals which is consistent with the 52.4 miles I went on reserve and my usual low-40's fuel consumption.

- Mark

 

[GrahamD]

So Mark...

What was the temperature?

 

[markjenn]

What was the temperature?

279.983 degrees Kelvin.

- Mark

 

[GrahamD]

279.983 degrees Kelvin.

- Mark

Only 3 decimal places sheesh.

 

[MurphCO]

My own scientific exploration this afternoon supports the 6.1 gallon capacity with appx 1.2ish reserve

I noticed the fuel gauge flashing about 25 miles from a gas station on the ride home and got a bit freaked out, I wasn't sure what the reserve was or how long I was riding while it was flashing....

For science sake I puckered my butthole and pretended to myself that it made me magically lighter, thus improving mileage. I also tried to coast downhill when possible.

When I pulled into the gas station and filled on the side stand I put in 4.7 gallons



Engineering is for suckers..... O


Knowing the reserve is somewhere in the general neighborhood around almost 1.2 gallons is good enough for this non-mathlete














I also realized I ought to fill up on the center stand

 

[MurphCO]

Thanks for doing the research for the rest of us

::015::

 

[Don in Lodi]

I noticed the fuel gauge flashing about 25 miles from a gas station on the ride home and got a bit freaked out, I wasn't sure what the reserve was or how long I was riding while it was flashing....
Engineering is for suckers..... O
Knowing the reserve is somewhere in the general neighborhood around almost 1.2 gallons is good enough for this non-mathlete
I also realized I ought to fill up on the center stand

Just for your info; the trip odometer? It starts counting up from zero when you hit "reserve". By the time that count 'up' reaches 40-50, you'll be walkin' pretty soon. It also needs to be reset to zero when you fill up. Unless you were on your main odo, then I don't know what the screen does.

 

[stevepsd]

Just for your info; the trip odometer? It starts counting up from zero when you hit "reserve". By the time that count 'up' reaches 40-50, you'll be walkin' pretty soon. It also needs to be reset to zero when you fill up. Unless you were on your main odo, then I don't know what the screen does.

The 'F' odometer pops up and starts counting UP from 0.0 when you go on 'reserve' i.e. the last LED block on the fuel gauge starts flashing. After you fill-up the 'F' odometer will disappear (in a mile or so) and reset.

In non-reserve mode, pressing the left button on the instrument cluster will cycle thru ODO - TRIP 1 - TRIP 2 - ODO

when on reserve the display is: TRIP F - ODO - TRIP 1 - TRIP 2 - TRIP F

 

[Don in Lodi]

The 'F' odometer pops up and starts counting UP from 0.0 when you go on 'reserve' i.e. the last LED block on the fuel gauge starts flashing. After you fill-up the 'F' odometer will disappear (in a mile or so) and reset.

In non-reserve mode, pressing the left button on the instrument cluster will cycle thru ODO - TRIP 1 - TRIP 2 - ODO

when on reserve the display is: TRIP F - ODO - TRIP 1 - TRIP 2 - TRIP F

Trip F resets on its own? Cool! I always just reset it before I leave the pump. Does trip F start up no matter which odo is displayed?

 

[SisuTen]

Is the Tenere fuel pump in the tank and lubricated by the fuel itself, as in most modern automobiles? If so, wouldn't running the tank dry compromise the longevity and reliability of the pump? I'm not striking wise, I really don't know the answers (at least regarding this bike)

Paul