How much HP will stock 3/8 fuel line support.
01-21-2002, 10:35 PM
#1
Safety Car
Thread Starter
How much HP will stock 3/8 fuel line support.
I am running two completly seperate fuel systems for my Nitrous injected 454. Both are fed by a seperate Holley blue pump and 3/8 fuel line. The motor makes approx 575 HP without the NOS. Is this large enough fuel line for that kind of HP. If it matters it is feeding a very hungry Holley 850 DP (flowed to 920) :chevy
01-22-2002, 01:17 AM
#2
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Re: How much HP will stock 3/8 fuel line support. (69 N.O.X. RATT)
Send Merlin522 a note, he just about wrote a paper on fuel line capacities, while he was sizing his fuel demands for his monster. I think he is using 3/4" Pipe for his fuel pumps. They flow something like 600 gallons an hour. :D
Good luck!
Good luck!
01-22-2002, 08:07 AM
#3
Team Owner
Re: How much HP will stock 3/8 fuel line support. (Smokehouse69)
3/4 inch fuel line, jeesus-catey-christ...must collapse the damn tank from sucking fuel out too fast!!!!
GENE
GENE
01-22-2002, 09:27 AM
#4
Race Director
Re: How much HP will stock 3/8 fuel line support. (Smokehouse69)
TIP: when going to a 3" exhaust, keep one side of of the old 2" system and re-plumb it for fuel. :eek: :D
01-22-2002, 12:36 PM
#5
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Re: How much HP will stock 3/8 fuel line support. (69 N.O.X. RATT)
I like the idea of the two-inch exhaust fuel line. I'd like to see the fittings into a monster carb. Maybe you could put a Big CAT engine from a 300 ton monster hauler in it. Hood clearance might be an issue.
01-22-2002, 12:55 PM
#6
Safety Car
Re: How much HP will stock 3/8 fuel line support. (Chris Breaux)
Chris:
Where did you get that cowl induction hood from...or did you fabricate it yourself? How much does something like that run? Thanks! :cheers:
Where did you get that cowl induction hood from...or did you fabricate it yourself? How much does something like that run? Thanks! :cheers:
01-22-2002, 01:59 PM
#7
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Re: How much HP will stock 3/8 fuel line support. (69 N.O.X. RATT)
I'm assuming your running two lines with two pumps. I would say you should be fine. My boss at my parttime job was running (10 years ago) a 68 Camaro with a carburated 512ci, that was running mid 9's in the 1/4 and he was running 3/8" line.
In my vette with the LS7 (468ci with a 750 Holley HP) I used both the stock 3/8" line and the 5/16" as a return line and never had a problem.
I think the size of the line has to do alot the with volume of the pump. In my Camaro I'm running a Paxton 300 pump and they recommended a #10 feed (gravity) and a #8 return line.
With the holley pumps your using, you can only flow so much fuel thru it, 3/8" should be fine.
[Modified by 70PurpleLS7, 1:01 PM 1/22/2002]
In my vette with the LS7 (468ci with a 750 Holley HP) I used both the stock 3/8" line and the 5/16" as a return line and never had a problem.
I think the size of the line has to do alot the with volume of the pump. In my Camaro I'm running a Paxton 300 pump and they recommended a #10 feed (gravity) and a #8 return line.
With the holley pumps your using, you can only flow so much fuel thru it, 3/8" should be fine.
[Modified by 70PurpleLS7, 1:01 PM 1/22/2002]
01-22-2002, 01:59 PM
#8
Safety Car
Thread Starter
Re: How much HP will stock 3/8 fuel line support. (bence13_33)
Bence: check out http://www.usbody.com :chevy
01-22-2002, 02:25 PM
#9
Melting Slicks
Re: How much HP will stock 3/8 fuel line support. (bence13_33)
Chris:
Where did you get that cowl induction hood from...or did you fabricate it yourself? How much does something like that run? Thanks! :cheers:
Where did you get that cowl induction hood from...or did you fabricate it yourself? How much does something like that run? Thanks! :cheers:
01-22-2002, 07:11 PM
#10
Safety Car
Re: How much HP will stock 3/8 fuel line support. (69 N.O.X. RATT)
69 Rat:
Which hood does he have? The only one that I saw was the 4.5" Dominator cowl induction hood. My buddy with the '80 454 Camaro currently has a 7" cowl induction hood :eek:.
BTW sorry about getting off topic with this post.
Which hood does he have? The only one that I saw was the 4.5" Dominator cowl induction hood. My buddy with the '80 454 Camaro currently has a 7" cowl induction hood :eek:.
BTW sorry about getting off topic with this post.
01-22-2002, 07:23 PM
#11
Safety Car
Thread Starter
Re: How much HP will stock 3/8 fuel line support. (bence13_33)
Bence: I think it is the 4" hood on his car. I was looking for something like that for my car so I could run a tall single plain intake, decided I wanted to look more stock and went with a L-88 instead. I checked out your photos today, pretty cool. The least time I was on that web site they had a choice of a 2" or a 4" :chevy
01-22-2002, 07:28 PM
#12
Safety Car
Thread Starter
Re: How much HP will stock 3/8 fuel line support. (70PurpleLS7)
70LS7: Yes they are two totally seperate fuel lines. I thought the 3/8 would be O.K. but it is nice to be sure. both pumps are the Holley blue (110gph) :chevy
01-22-2002, 10:28 PM
#13
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Re: How much HP will stock 3/8 fuel line support. (69 N.O.X. RATT)
The simple answer is no. I had two Mallory Comp 140 pumps plumbed into a single dash 10 line up to the engine compartment. Then it split into two dash eight lines, carb and NOS system. I never had a fuel problem. Motor made 530 and 800 with the NOS. dash 10 is 3/4 and dash 8 is 1/2. I would have at least 1/2 on the car.
Joe
Joe
