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748 / 996 tank with carbs

Started by The Mad King Pepe', July 21, 2011, 03:46:24 PM

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The Mad King Pepe'

July 21, 2011, 03:46:24 PM
what's the best way to connect them?

I have a 748 / 996 tank for my 2V SBK project and I need to connect the fuel line to the carbs (paired FCR 41). The tank has an internal fuel pump and filter, is it best to keep the stuff in the tank or to get rid of it? Anyone familiar with the fuel line diagrams for the 996 bikes?

TIA!
First they came for the Socialists, and I did not speak out-- Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out-- Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out-- Because I was not a Jew.
Then they came for me--and there was no one left to speak for me.

ducpainter

#1
July 21, 2011, 05:50:22 PM
Quote from: The Mad King Pepe' on July 21, 2011, 03:46:24 PM
what's the best way to connect them?

I have a 748 / 996 tank for my 2V SBK project and I need to connect the fuel line to the carbs (paired FCR 41). The tank has an internal fuel pump and filter, is it best to keep the stuff in the tank or to get rid of it? Anyone familiar with the fuel line diagrams for the 996 bikes?

TIA!
I would remove the high pressure pump and use an early SS carbed internal pump, or an external electric.

When you remove the flange you'll see which one is feed.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Pedro-bot

#2
July 21, 2011, 08:32:57 PM
Vacuum fuel pump?
1999 M750 AKA Little Blue Monster, 2002 S4, 2006 Sport 1000, 2008 Sport 1000, 2005 749s, 2018 R NineT Urban GS

koko64

#3
July 21, 2011, 11:06:48 PM
+1.
Much cheaper. Square Mikuni pump. Runs off inlet manifold.
2015 Scrambler 800

The Mad King Pepe'

#4
July 22, 2011, 06:55:47 AM
If I use the vacuum pump, does it make sense to take the fuel filter out of the tank as well or should I just leave it in there? I'm thinking of the stock monster setup: tank -> filter -> petcock -> pump -> carbs.

First they came for the Socialists, and I did not speak out-- Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out-- Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out-- Because I was not a Jew.
Then they came for me--and there was no one left to speak for me.

koko64

#5
July 22, 2011, 02:16:22 PM
You could use whatever option suits your packaging requirements. Being a tightarse I'd sell the stock parts and buy a vacuum pump. I like a clear, external filter to see what's going on and for ease of service. You might like the internal filter if packaging is getting tight.
I really like your build.
Split FCRs would be cool. I would have done it to the Monster, but don't want to cut the frame. One day...
2015 Scrambler 800

ducpainter

#6
July 23, 2011, 04:45:39 AM
I still think a small electric is a better option.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Drunken Monkey

#7
July 23, 2011, 12:11:16 PM
Quote from: ducpainter on July 23, 2011, 04:45:39 AM
I still think a small electric is a better option.

+1

Check the "cheap alternatives to high priced OEM parts" thread. There should be something in there about how the stock 'low pressure' pump is actually from Mopar.
I own several motorcycles. I have owned lots of motorcycles. And have bolted and/or modified lots of crap to said motorcycles...

Speeddog

#8
July 23, 2011, 02:02:15 PM
Here's a small one, low pressure:
http://www.holley.com/15760NOS.asp

I used one years ago on my Nitrous assisted lakes racebike.

The pic on that page is almost actual size, IIRC, they're a bit bigger.

You'll still need a return line going back to the tank, like the SS's had, I don't think FCR's can hold back 5 psi.
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ducpainter

#9
July 23, 2011, 06:43:36 PM
Quote from: Speeddog on July 23, 2011, 02:02:15 PM
Here's a small one, low pressure:
http://www.holley.com/15760NOS.asp

I used one years ago on my Nitrous assisted lakes racebike.

The pic on that page is almost actual size, IIRC, they're a bit bigger.

You'll still need a return line going back to the tank, like the SS's had, I don't think FCR's can hold back 5 psi.
There are some Delco pumps in the 3-4 psi range...

should be fine for FCRs
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


The Mad King Pepe'

#10
July 25, 2011, 06:35:49 AM
Thanks to all for the useful inputs. Since I have the stock Monster pump laying around (and I'm cheap [laugh]), I'll try that one first.
First they came for the Socialists, and I did not speak out-- Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out-- Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out-- Because I was not a Jew.
Then they came for me--and there was no one left to speak for me.

The Mad King Pepe'

#11
August 01, 2011, 06:52:01 PM
Little update here, I got a M10 x 1.25 banjo bolt and a fitting to go with it. I'm taking the pump, filter etc out of the tank and pulling gas from the fitting.


First they came for the Socialists, and I did not speak out-- Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out-- Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out-- Because I was not a Jew.
Then they came for me--and there was no one left to speak for me.
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