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Main Fuel line size
#602614
02/03/10 05:37 PM
02/03/10 05:37 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
OP
master
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OP
master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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What size fuel line are you running from the fuel cell pump/filter to the regulator in the front?...
I was thinking -8AN but who runs -10AN?
This is BG 280 fuel pump by the way and needs to feed 800+hp..
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Main Fuel line size
[Re: Bob_Coomer]
#602615
02/03/10 05:47 PM
02/03/10 05:47 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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you need to run -10an to the regulatorfrom the pump. i run a -8an back to the cell from the return.
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Re: Main Fuel line size
#602616
02/03/10 05:48 PM
02/03/10 05:48 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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heres a picture of the return back to the cell.
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Re: Main Fuel line size
[Re: Bob_Coomer]
#602617
02/03/10 05:59 PM
02/03/10 05:59 PM
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Joined: Aug 2003
Posts: 43,214
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,214
Bend,OR USA
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I use a Magnafuel 300 pump now,(street and strip car) Magnafuel wants a #10 feed to the pump from the cell, # 8 return line from the pump to the cell and a #8 to the front to the regulator  I would call BG and ask them what size to use on there pump  BTW, I had two of the BG280(not for street use according to BG) and sold them to freinds who have race only cars and they use 1/2(#8) aluminmum hard line to the front from there pumps
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Main Fuel line size
[Re: Cab_Burge]
#602618
02/03/10 06:03 PM
02/03/10 06:03 PM
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Joined: Apr 2005
Posts: 1,880
USA
Ron Silva
top fuel
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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I have a BG HR220 and I use a -10 suction, a -8 feed to the regulator at the carb and a -10 return. BG wants a larger return line and a generous suction line. You can hurt a pump's output more by restriction the suction.
SRT DEMON ONE SEAT
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Re: Main Fuel line size
[Re: Ron Silva]
#602620
02/03/10 06:09 PM
02/03/10 06:09 PM
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Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
chryco
super stock
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super stock
Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
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-12 from the cell to the pump, then -10 to the reg, and -8 to the carb . NO problems.........
Chryco
Gas is fer washin' parts ....Alky`s fer drinkin' ...Nitro`s fer Racin'!
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Re: Main Fuel line size
[Re: chryco]
#602621
02/03/10 06:11 PM
02/03/10 06:11 PM
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Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
chryco
super stock
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super stock
Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
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More .......
Feeding a 557" RBRE / KB Hemi .
Gas is fer washin' parts ....Alky`s fer drinkin' ...Nitro`s fer Racin'!
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Re: Main Fuel line size
[Re: chryco]
#602622
02/03/10 06:35 PM
02/03/10 06:35 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
OP
master
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OP
master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Im just wondering if -10 is overkill..I have a long section of -8AN hose and some fittings. I know on the dragster I ran -8AN running alky/methonal and it was what I would consider a pretty high demand system...it burnt 2 1/2 gallons of fuel per 8th mile run. So how does one draw the line? Does duel carbs make a diff? According to BG the 280 Pump doesnt require a return, which is fine by me. It says a -10 to from the fuel cell to the inlet of the pump, then -8 to the regulator.. I have the pump and there two port regulator, I wont be running there fuel filter..I will be running a earls 85 micron stainless mesh type filter. http://www.barrygrant.com/bgfuel/default.aspx?page=85
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Main Fuel line size
[Re: Bob_Coomer]
#602623
02/03/10 07:10 PM
02/03/10 07:10 PM
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Joined: Oct 2009
Posts: 1,288
Oregon
sg66mopar
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,288
Oregon
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Lots of people claim too big of a main feed line can be detrimental. More mass of fuel and a larger cross sectional area in the line for the G forces to act on. Everybody I know personally in SG and SC runs a -12 from the cell to pump; -10 pump to front and -8 if they have a return line. I ran a BG 280 for about 8 years at mid nines in my charger with -8 line to the front and -8 return line back to the cell. Last year I switched to the BG 400 with -12 to the pump, -10 to the front and just the short bypass from the pump to the cell. Never showed any signs of fuel starvation running 8.9 - 9.0 I did the 1 gallon gas can test on my car with no alternator, just 12.4 volts at the pump and it filled the can in about 12 seconds going through the regulators, right at the carb inlets.
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Re: Main Fuel line size
[Re: sg66mopar]
#602624
02/03/10 07:22 PM
02/03/10 07:22 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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MY 581 hemi has a BG 280 and i run a -10an to the pump from the cell and -8an from the pump to the regulator with no bypass but i was going to take it out and go to the -10an up to the regulator. going 9.79 now. im wondering if ill pick up with the bigger line, no sure if im starving the motor, im also going to a product engineering pump.
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Re: Main Fuel line size
#602625
02/03/10 07:27 PM
02/03/10 07:27 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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this is my old setup which you might be going to.
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Re: Main Fuel line size
#602626
02/03/10 07:45 PM
02/03/10 07:45 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Now you guys got me thinking I can use my existing 1/2" and -8 going from the pump to the reg and just jump it to a -10 from the cell to the pump. 
That would be nice. 
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Re: Main Fuel line size
[Re: sg66mopar]
#602628
02/03/10 08:01 PM
02/03/10 08:01 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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I'll definatly run that test before I shell out any  I don't have anyway.
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Re: Main Fuel line size
[Re: sg66mopar]
#602629
02/03/10 08:31 PM
02/03/10 08:31 PM
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Joined: Dec 2008
Posts: 1,200
UK
602heavy
pro stock
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pro stock
Joined: Dec 2008
Posts: 1,200
UK
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Quote:
Do the fuel can test then you'll know. 10 second ET needs to fill the can in 25 seconds. 9 sec. need to fill the can in 20 
I think you should be good to go.
9 sec et requires 180 gph , 8 sec et 240 gph , do we tend to over kill on fuel pump flow? , some guys run 400gph pumps , that's 10 sec to fill a gallon can  , i realise G force comes into this but i still think it's overkill. 
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Re: Main Fuel line size
[Re: chryco]
#602630
02/03/10 09:09 PM
02/03/10 09:09 PM
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Joined: Dec 2008
Posts: 37
springfield,il
orangeduster
member
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member
Joined: Dec 2008
Posts: 37
springfield,il
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Quote:
-12 from the cell to the pump, then -10 to the reg, and -8 to the carb . NO problems.........
Chryco
x 2
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Re: Main Fuel line size
[Re: sg66mopar]
#602632
02/03/10 10:17 PM
02/03/10 10:17 PM
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Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
jamesc
master
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master
Joined: Jan 2003
Posts: 5,875
communist bloc of new jersey
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Quote:
Lots of people claim too big of a main feed line can be detrimental. More mass of fuel and a larger cross sectional area in the line for the G forces to act on.
those people are flat wrong and don't understand the mechanics of fluids. the diameter of the line has no impact on the force imparted by acceleration, the effective length of the line does. the pressure exerted on a column of fluid would be SG (specific gravity) x .433 (PSI exerted by a 12" column of water) x distance from suction to feed x G force. the actual length of the line to some extent doesn't matter. an example would be say you have 15' of hose but 5' is taken up in bends. then the effective length would be 10'. so .725 x .433 x 10' x (say 2G) = 6.28 PSI. this is the pressure the pump would have to overcome to move fluid and is part of the reason to mount the regulator at the engine. most (decent) pumps have the ability to generate a fair bit, probably upwards of 20 PSI or so. i would say the VAST majority of our cars don't pull 2G for any length of time if at all. a TF dragster pulls around 4 off the line but actually pulls harder down track.
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Re: Main Fuel line size
#602633
02/03/10 10:23 PM
02/03/10 10:23 PM
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Joined: Mar 2008
Posts: 1,596
BX, CT, FL.
B1KILLER
pro stock
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pro stock
Joined: Mar 2008
Posts: 1,596
BX, CT, FL.
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Quote:
you need to run -10an to the regulatorfrom the pump. i run a -8an back to the cell from the return.
X2
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