Re: how much hp will 3/8 fuel line handle?
[Re: maximum entropy]
#604962
02/05/10 03:02 PM
02/05/10 03:02 PM
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Joined: Sep 2005
Posts: 769 Europa, Estonia
Georg
super stock
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super stock
Joined: Sep 2005
Posts: 769
Europa, Estonia
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3/8 line 400hp max 1/2 line 600-700hp max 5/8 line 900-1000hp max Up to about 400-500hp or with mechanical fuel pump you can use the single line dual feed kit, after that HP range or with any electric pump and regulator a line from each of the two ports should be run to each bowl of the carb and also these lines mast be as short as possible
Outlaw Plymouth Valiant
R5/P7 Powered by Liuzzo Racing
COMP Performance Group dealer in Baltic
Premium Performance
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Re: how much hp will 3/8 fuel line handle?
[Re: Georg]
#604967
02/05/10 04:07 PM
02/05/10 04:07 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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My friends have gone 8.20s at 3000lbs with 6an line
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: how much hp will 3/8 fuel line handle?
[Re: IcorkSOAK]
#604969
02/05/10 05:30 PM
02/05/10 05:30 PM
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Joined: Jan 2003
Posts: 302 Casa Grande,Arizona
DennisJ
super street
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super street
Joined: Jan 2003
Posts: 302
Casa Grande,Arizona
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Right on Doc. I had a bent 5/16 line that I think was smashed with a floor jack. The car still ran 11.86 @ 116.
Dennis Jokela
I started out with nothing,and I still have most of it.
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Re: how much hp will 3/8 fuel line handle?
[Re: carolinacuda]
#604972
02/05/10 09:06 PM
02/05/10 09:06 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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It's amusing to see guys with 318's running fuel logs, big electric pumps, etc...
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Re: how much hp will 3/8 fuel line handle?
#604973
02/05/10 09:48 PM
02/05/10 09:48 PM
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Joined: Jan 2003
Posts: 1,894 N of Detroit
DaveDudek
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,894
N of Detroit
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I have one stock 5/16 fuel line feeding both carbs. 10.35@134.4 and 770HP on the dyno..
Dave Dudek 1st Factory Stock legal car in the 10`s!!! [/b] FAST & Factory Stock Rules: www.fastraces.org FAST 69 Hemi RR 9.98@139
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Re: how much hp will 3/8 fuel line handle?
[Re: carolinacuda]
#604974
02/05/10 09:54 PM
02/05/10 09:54 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks for your input guys. I feel a little better bout this. Now time to spend money else where!!!
Remember that most of the carbs are running a .110 needle and seat per float(some are only a single .110 needle and seat).... alot of times you would be better to go up in the needle and seat size as in a .120 or .130 If you can jet up enough to slow the car down(MPH) you are getting enough fuel... if it does slow down when jetting up I would change the needle and seat first before buying a pump or changing fuel lines but bigger will NEVER kill your engine like a lean condition will
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Re: how much hp will 3/8 fuel line handle?
[Re: @#$%&*!]
#604976
02/06/10 12:13 AM
02/06/10 12:13 AM
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Joined: Jan 2003
Posts: 10,766 Central Valley, CA.
Quicksilver440
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,766
Central Valley, CA.
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Quote:
The problem with this method (BG below) is it totally ignores the weight of the vehicle. Here's a test I plan to preform someday soon: Take fuel bowls off carb and put them in cans and turn on the fuel pump and see just how much the pressure drops at maximum float drop.
Quote:
...barygrant...has got a ton of good info on this topic. Basically, their "fuel Can Test" pretty much makes the line size / pump size topic a moot point. It's based on how many seconds it takes to fill a 1 gallon gas can.
What does the weight of the vehicle have to do with it?
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Re: how much hp will 3/8 fuel line handle?
[Re: strokin73cuda]
#604978
02/06/10 01:40 AM
02/06/10 01:40 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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5/16 fuel line on my sons Dart and 3/8 on my 63 because I hope to go faster with my 63 some time down the road. Both run 11.40's without all the fancy fitting and we run the red Holley pump. Ron
Last edited by 383man; 02/06/10 01:40 AM.
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Re: how much hp will 3/8 fuel line handle?
[Re: @#$%&*!]
#604979
02/06/10 03:14 AM
02/06/10 03:14 AM
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Joined: Aug 2003
Posts: 43,909 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,909
Bend,OR USA
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[quote] The problem with this method (BG below) is it totally ignores the weight of the vehicle. Here's a test I plan to preform someday soon: Take fuel bowls off carb and put them in cans and turn on the fuel pump and see just how much the pressure drops at maximum float drop. Fuel pressure has nothing to do with how much volume the system will support, if you do that test and you have any pressure at the gauge you need bigger fittings, lines or needles and seat <img src="/ubbthreads/images/graemlins/scope.gif" alt="" />As MrPbody already pointed out, the real test of any fuel system(on gasoline) is to be able to fatten the mixture up enough so you can slow the car down by having the mixture to rich. I have seen some very knowlegable racers find out that they had enough fuel to run low nines at 148.7 MPH on squeeze but not enougn fuel delivery(volume) to go any faster. This particular racer jetted his carb up 10 jets sizes in 5 stages(two sizes at a time on all four jets) and the car ran within 1/4 MPH in the 1/4. It didn't miss, it didn't burn up any spark plug ground electrodes or hurt any parts. He added another pump, line and regulator and jetted it back down to the beginning jetting and the car pickup .22 ET and three MPH (151.6)on the first run. He jetted it up two sizes and went faster, he tried another two sizes and slowed down a tiny bit, he went up another two sizes and slow down two MPH <img src="/ubbthreads/images/graemlins/1343795-scratchchin.gif" alt="" /> It pays to test <img src="/ubbthreads/images/graemlins/thumbs.gif" alt="" />
Last edited by Cab_Burge; 04/12/21 01:44 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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