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Author
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Topic: FUEL LINE SIZE
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stroker man
Gearhead Posts: 332
From: Denville NJ USA
Registered: Mar 2002
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posted 04-13-2005 04:02 PM
   
JUST WONDERING IF MY -10 FUEL LINE IS OVER BOARD ON MY 69 MACH1 402W, TALKING TO SOMEONE WHO SAID IT MIGHT BE BECAUSE IT WILL RUN OUT OF FUEL AT TOP END LOWER FUEL PRESSURE, I HAVE-10 FROM SUMP UNDER GAS TANK TO FILTER AND THERE TO MALLORY 140 PUMP TO FENDER, THEN -8 TO MECH FUEL PUMP TO REG TO CARB, ALSO SHOULD I TAKE OFF THE CARTER PUMP THATS ON THE ENGINE AND JUST RUN THE MALLORY?, THANKS.
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grego37
Gearhead Posts: 365
From: los angeles,CA,USA
Registered: May 2004
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posted 04-13-2005 04:45 PM
I'd run 1/2" Russell/Earles hard line (anodized bendable aluminum)under the car. and -8 everywhere else.
-10 sounds too big to me.Id run an electric fuel pump and an adjustable regulator.
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kid vishus
Gearhead Posts: 6405
From: middle of NC
Registered: Oct 2000
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posted 04-13-2005 04:54 PM
My opinion, the -10 isn't too big. That's what I have on my car and it works fine (but I have a Holley 350 Dominator fuel pump.) I think you have 2 issues; one is the block mounted fuel pump (I would ditch it entirely), and the second is your electric pump isn't big enough. But maybe the electric pump just can't push fuel thru the mechanical pump fast enough to feed the motor. First thing I would do is remove the block mounted pump and see what it does. If it still runs out at the top end, I would buy a bigger fuel pump.
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stroker man
Gearhead Posts: 332
From: Denville NJ USA
Registered: Mar 2002
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posted 04-13-2005 05:01 PM
THANKS MY ENGINE GUY SAID TO RUN JUST THE MALLORY AND SEE WHAT HAPPENS, I DONT WANT TO REPLACE MY FUEL LINE TO MUCH WORK, IT SEEMS TO RUN GOOD BUT I NEVER REALLY OPENED IT UP AT TOP END YET NEW MOTOR, TEST AND TUNE TO FOLLOW.
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Moneymaker
Administrator Posts: 26813
From: Lyons, IL, USA
Registered: May 99
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posted 04-13-2005 05:11 PM
#10 is not too big.
Just right.
Lose the mechanical pump.
It's just a restriction at this point.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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stroker man
Gearhead Posts: 332
From: Denville NJ USA
Registered: Mar 2002
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posted 04-13-2005 10:19 PM
THANKS ALEX THATS WHAT IM DOING.
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-13-2005 10:25 PM
It's not too big, BUT it's way bigger than you need.  SteveW
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stroker man
Gearhead Posts: 332
From: Denville NJ USA
Registered: Mar 2002
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posted 04-14-2005 06:21 AM
IT WASNT MT IDEA TO USE A -10 LINE BUT THIS SPEED SHOP GUY INSISTED TO USE IT I JUST WANTED -8 LINE AND BE DONE WITH IT, SEEMS TO RUN FINE SO FAR.
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Moneymaker
Administrator Posts: 26813
From: Lyons, IL, USA
Registered: May 99
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posted 04-14-2005 10:14 AM
quote:
Originally posted by steve'66:
It's not too big, BUT it's way bigger than you need. SteveW
That's what she says.  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
NHRA and IHRA SS/LA & SS/MA National Record Holder '00,'01,'02,'03,'04 &'05
First NHRA & IHRA 289 automatic Superstock Mustang in the TENS 06-99
First SS/MA in the TENS 04-03
IHRA division 5 Superstock Champion
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28 The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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stroker man
Gearhead Posts: 332
From: Denville NJ USA
Registered: Mar 2002
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posted 04-14-2005 01:28 PM
bigger isnt always better.
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TomP
Gearhead Posts: 6007
From: Delta BC Canada
Registered: Dec 99
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posted 04-16-2005 09:11 PM
You shouldn't be pressurizing the inlet side of the mechanical. It's best to put a Tee fitting at the mechanical pump's inlet and return excess fuel back to the tank.
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-16-2005 10:53 PM
Tom,Why shouldn't you pressurize the fuel to a mechanical pump? SteveW
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