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Author Topic: Fuel Gauge Accuracy  (Read 9688 times)

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110tHunDer

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Fuel Gauge Accuracy
« on: October 06, 2004, 10:42:41 PM »

I know we've talked about this some before, but for you guys picking up new units it might come in handy to revisit.

Coming home on Sunday I was trying to make some time and not stop as soon/often as I had been for fuel.  I put 5.294 gallons of gas into my SEEG's (5 gallon [smiley=nixweiss.gif]) tank during one stop.  The bike actually began to sputter just as I was positioning it in front of the pump.  The gauge, however, was still above the "E," about half way between "E" and the first mark.  My advice: never let the gauge drop below the first mark (the one that represents 1/12 full).  You'll be taking a big gamble that you'll make it to the next station.  The gauges on these bikes (take your pick: fuel, air temp, volts, even oil pressure?) are not very accurate.
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Twolanerider

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Re: Fuel Gauge Accuracy
« Reply #1 on: October 06, 2004, 11:10:44 PM »

In only three times time with the bike now I've been very pleasantly suprised on this little score.  My fuel gauge (at least down to about 1/8 of a tank) seems to be pretty darned accurate.  I've put fuel in at 1/2, 3/4, and a few other measures and it's been better than merely suggestive.  And I sure as hell know that E is empty from when the dealer sent me out the door without fuel when I picked it up new.

My oil pressure and and volt meter readings are where I'd expect them to be and, surprisingly, my ambient air temp gauge seems to be pretty close.  Off no more than 5 degrees or so no the high side.  I've timed the speedo against mile markers and it's as close as they kind of a measure can tell you.

One I have been wondering about, however, is the tach.  At a dead on 70 mph the tach shows 2800.  I was expecting 3200-ish.  It is just the stock 5 speed.
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BLM777

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Re: Fuel Gauge Accuracy
« Reply #2 on: October 07, 2004, 06:32:47 AM »

Just for comparison, my tach reads exactly 3000 at 70.  When riding with friends, however, they report that my 70 is about 75 on their scooters.  Maybe the speedo error accounts for your variance in rpm. A guess at best! [smiley=nixweiss.gif]
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mr_magoo

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Re: Fuel Gauge Accuracy
« Reply #3 on: October 07, 2004, 08:35:24 AM »

I us the fuel light as a guide when it comes on I have 20 miles or so left.  As far as the tach where your buddys on SEEG if not that is probably the difference the SEEG is over driven at the primary sprocket.
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Glave

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Re: Fuel Gauge Accuracy
« Reply #4 on: October 07, 2004, 09:50:53 AM »

Quote

One I have been wondering about, however, is the tach.
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the O`Fender

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Re: Fuel Gauge Accuracy
« Reply #5 on: October 07, 2004, 11:11:55 AM »

Quote

Not on an SEEG, I ride a SERK but my Tach reads 2800rpm at 70 also.  Noticed this after having the PCIII installed.  Prior to that it was running at about 3200RPM at 70. [smiley=nixweiss.gif]


HUH!!! do you thing the PCIII screwed up the calibration of one of your gauges?
because without a gear change that number should stay constant
[smiley=stars.gif]
« Last Edit: October 07, 2004, 02:40:15 PM by the_ofender »
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Glave

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Re: Fuel Gauge Accuracy
« Reply #6 on: October 07, 2004, 12:19:34 PM »

Quote

HUH!!! do you thing the PCIII screwed up the calibration of one of your gauges?
becuase without a gear change that number should stay constant
 [smiley=stars.gif]



Honestly I don't know [smiley=nervous.gif], all I can say is that is when I noticed the difference.  Not being much of a gear head I assumed (read ass u & me) that this had something to do with fuel mix across the powerband.  All I can say is that there seemed to be an RPM change after the dyno tune. [smiley=nixweiss.gif]  Now you got me wondering myself [smiley=confused5.gif].  Any other input from yourself or others would be greatly appreciated.
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JCZ

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Re: Fuel Gauge Accuracy
« Reply #7 on: October 07, 2004, 02:31:21 PM »

And we had a discussion for awhile about wether these tanks could hold more than five (5) gallons.  My comment back then was that the five gallon bagger tanks on the Electra Glides, Ultra Classics, etc. have always held a tad over 5 gallons.  The proofs at the pump.....if you're using calabrated pumps (in Calif. calibration is the law).  In the photo, it shows almost 3/10 of a gallon over 5!
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103Eagle

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Re: Fuel Gauge Accuracy
« Reply #8 on: October 07, 2004, 03:32:24 PM »

Hey All,
   I set the trip meter each fill up and anytime after 160 miles I am lookin for fuel.  Sometimes the low fuel light comes on at that time and sometimes she don't.  Depends on what type of ridin I have been doing.  My mileage varies between 36 and 42 mpg depending on conditions and wrist twist disease!  ha ha    My fuel gauge is not accurate since I changed the rear shocks to the electraglde classic touring type, thus the rear is 1" higher than the screamin eagle lowered suspension.   Yes I left the front forks lowered and you really can't  notice a difference other than the softer ride for momma in the rear!

[smiley=drink.gif]                                 [smiley=beerchug.gif]
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110tHunDer

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Re: Fuel Gauge Accuracy
« Reply #9 on: October 07, 2004, 03:36:24 PM »

Quote
And we had a discussion for awhile about wether these tanks could hold more than five (5) gallons.
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DW6019

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Re: Fuel Gauge Accuracy
« Reply #10 on: October 07, 2004, 04:11:09 PM »

103 Eagle, I assume you were kidding about the shocks/fuel gauge accuracy? You do realize that it is just a float in a puddle? A slight increase in rear height, or frt height or the weight of you or a passenger will have such a min effect it would not be measureable.
But again, I know you were being funny!
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Twolanerider

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Re: Fuel Gauge Accuracy
« Reply #11 on: October 07, 2004, 04:41:56 PM »

Quote
And we had a discussion for awhile about wether these tanks could hold more than five (5) gallons.
« Last Edit: October 07, 2004, 04:49:01 PM by twolanerider »
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Twolanerider

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Re: Fuel Gauge Accuracy
« Reply #12 on: October 07, 2004, 04:46:34 PM »

Quote

Not on an SEEG, I ride a SERK but my Tach reads 2800rpm at 70 also.
« Last Edit: October 07, 2004, 04:49:45 PM by twolanerider »
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WFP

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Re: Fuel Gauge Accuracy
« Reply #13 on: October 07, 2004, 06:49:20 PM »

Just rode home from dinner...was doing 73 @3000RPM.

/bill
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Loose_Goose

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Re: Fuel Gauge Accuracy
« Reply #14 on: October 07, 2004, 08:16:32 PM »

Between 70 and 75mph I'm at 3000rpm.  I know this because that's where I set my cruise when I'm on the freeway.  I've already gone 30 miles after my low fuel light has come on.  Put in over 5 gallons of gas, I think it was less than 5.1 gallons.  It was another ten miles to home, I wonder if I would have made it?
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