DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« on: March 23, 2016, 07:59:36 AM » |
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I recently installed a belly tank. My question is; going from gravity feeding the carbs, to using a fuel pump to push gas to the carbs - Did you see a change in your fuel economy?
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263  |
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MarkT
Member
Posts: 5196
VRCC #437 "Form follows Function"
Colorado Front Range - elevation 2.005 km
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« Reply #1 on: March 23, 2016, 09:53:30 AM » |
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What have you seen Josh? Do you have enough data samples from various conditions for the data to be meaningful? FWIW I haven't seen any significant change in spite of all the tweaks I've done. (Different height tires, slightly more tire pressure, running a bit more weight (gas), raising the shield slightly, changed load on the alternator with bulb changes, LEDs vs. incandescent. Not thinking of other tweaks that might impact mileage. Checked carb sync, it was spot on. For those who don't know, my belly tank install retains gravity feed. I'm still very close to 34mpg most of the time.
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #2 on: March 23, 2016, 10:31:27 AM » |
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What have you seen Josh? Do you have enough data samples from various conditions for the data to be meaningful? FWIW I haven't seen any significant change in spite of all the tweaks I've done. (Different height tires, slightly more tire pressure, running a bit more weight (gas), raising the shield slightly, changed load on the alternator with bulb changes, LEDs vs. incandescent. Not thinking of other tweaks that might impact mileage. Checked carb sync, it was spot on. For those who don't know, my belly tank install retains gravity feed. I'm still very close to 34mpg most of the time.
I'm simply focusing on what impact pumping fuel to the carbs has on MPG rather than gravity feeding carbs. I only have 100 miles on my first belly tank so I cannot figure anything at this point. So curiously asking others what they found. |
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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Pete
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« Reply #3 on: March 23, 2016, 10:59:02 AM » |
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Assuming everything was working properly in either approach.
I can see no reason why mileage would change.
If it did I would suspect a problem with the system that gave the worst mileage.
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Gryphon Rider
Member
Posts: 5227
2000 Tourer
Calgary, Alberta
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« Reply #4 on: March 23, 2016, 11:03:21 AM » |
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Fuel supply to the carburetors is ultimately controlled by the floats and float needles. Fuel pressure just has to be sufficient to put enough fuel at the float needles so they aren't starved. I would think fuel pressure would have to be significantly higher to overcome the pressure of the floats on the needles to cause a rich condition.
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bentwrench
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« Reply #5 on: March 23, 2016, 03:33:49 PM » |
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Over 70k on my r+m setup with no problems,No change fuel milage at all. That pump doesn't have enough pressure to over come the float valves.
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #6 on: March 23, 2016, 04:46:38 PM » |
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Great. Thank you for the input.
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #7 on: March 26, 2016, 10:18:16 AM » |
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I have a couple more questions about riding with the Belly Tank.
-Is the any reason to turn the petcock to the 'Off' position, or do you just leave it in the 'On' position. I understand Reserve works as normal.
-Do you have any advice on switching a bad pump out on the side of the road? I bought the tank used and don't know how many miles are on the pump. I have a new pump I will pack for the trip. Are there special tools I should pack? Follow a certain order of events in removing and replacing? I fear having a full tank of gas when trying to do this.
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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WintrSol
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« Reply #8 on: March 26, 2016, 06:36:43 PM » |
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While I always set mine to OFF, I once rode over 70 miles with it off, so I'm not sure the petcock does much of anything. The person who installed my tank also added an electrically operated fuel shut-off valve, which blocks the line from the pump when the ignition is off, though, so I can't say if leaving it on will be different without the valve.
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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R&MM
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« Reply #9 on: March 27, 2016, 07:55:05 AM » |
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In case of fuel pump failure: First turn petcock to off postition. Using the pair of pliers that are in your tool kit, we disconnect oem carb hose from the fuel filter and reconnect it to the petcock. Using the fuel filter reconnect both hoses from the belly tank to prevent any fuel lose. You now have by passed the belly tank and continue running off what is left in the main tank/reserve on a manual petcock. Hope this helps. Its also at the end of the instruction manual that's on our website.
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WintrSol
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« Reply #10 on: March 27, 2016, 11:56:18 AM » |
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Its also at the end of the instruction manual that's on our website.
Maybe it's in the French version of the instruction manual, but I don't see it in the English version. I don't read French, BTW. |
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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R&MM
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« Reply #11 on: March 27, 2016, 01:22:34 PM » |
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It's currently now updated!! Sorry
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WintrSol
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« Reply #12 on: March 27, 2016, 02:28:43 PM » |
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It's currently now updated!! Sorry
Is there another web site, besides this one? http://rmworksinc.com/Information.htmlThe install instructions there haven't changed, yet. |
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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R&MM
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« Reply #13 on: March 27, 2016, 03:04:54 PM » |
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You have to clear your old memory out/your cookies. Cause that works properly for me.
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #14 on: March 27, 2016, 03:14:59 PM » |
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In case of fuel pump failure: First turn petcock to off postition. Using the pair of pliers that are in your tool kit, we disconnect oem carb hose from the fuel filter and reconnect it to the petcock. Using the fuel filter reconnect both hoses from the belly tank to prevent any fuel lose. You now have by passed the belly tank and continue running off what is left in the main tank/reserve on a manual petcock. Hope this helps. Its also at the end of the instruction manual that's on our website.
Perfect, thank you. |
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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MarkT
Member
Posts: 5196
VRCC #437 "Form follows Function"
Colorado Front Range - elevation 2.005 km
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« Reply #15 on: March 27, 2016, 05:15:27 PM » |
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In case of fuel pump failure: First turn petcock to off postition. Using the pair of pliers that are in your tool kit, we disconnect oem carb hose from the fuel filter and reconnect it to the petcock. Using the fuel filter reconnect both hoses from the belly tank to prevent any fuel lose. You now have by passed the belly tank and continue running off what is left in the main tank/reserve on a manual petcock. Hope this helps. Its also at the end of the instruction manual that's on our website.
Perfect, thank you. I have an extra-long needle nose pliar (I lengthened an already-long pair) to detach/reattach the fuel line to the petcock. If you haven't done that, might want to put one in your toolbag. Frankly I don't want to have to do this on the side of the road in the dark. Hard enough in the shop. Hence my mods to set it up as a gravity feed in advance. |
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« Last Edit: March 27, 2016, 09:34:42 PM by MarkT »
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WintrSol
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« Reply #16 on: March 27, 2016, 07:45:01 PM » |
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You have to clear your old memory out/your cookies. Cause that works properly for me.
I cleared my history and cookies, still shows it ending at page 9; I tried downloading the file, and got the same file as before. Curious. |
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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MarkT
Member
Posts: 5196
VRCC #437 "Form follows Function"
Colorado Front Range - elevation 2.005 km
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« Reply #17 on: March 27, 2016, 09:28:32 PM » |
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It's actually the cache that needs to be refreshed. In Firefox options, that's in advanced\network. You can force a reread with <shft> reload. Depending on what browser IIRC you can also set in options for refreshing any page that's changed.
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« Last Edit: March 27, 2016, 09:33:37 PM by MarkT »
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WintrSol
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« Reply #18 on: March 28, 2016, 10:56:04 AM » |
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OK, that did it, I think. I also 'upgraded' to Windows 10 yesterday, so that could have done it, too.
Either way, thanks.
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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