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Upgrading Fuel Lines etc...
#180467
01/01/09 03:17 PM
01/01/09 03:17 PM
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Joined: Feb 2007
Posts: 6,295
U.S.
moparniac
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I currently run -6an and a 140gph pump and 2 -6an lines to my dominator..
When I go half inch sending unit and line to the regulator is it okay to keep my 3 port 6an aeromotive regulator and put like a fitting in the bottom of the reg for the half inch line??? or get the proper fitting regulator.
Also is 140gph enough for about 725-750hp
thx
Last edited by wedgeOmatic; 01/01/09 03:18 PM.
Mopar Performance
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Re: Upgrading Fuel Lines etc...
[Re: moparniac]
#180468
01/01/09 03:47 PM
01/01/09 03:47 PM
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Joined: Sep 2003
Posts: 1,260
Netherlands
72Challenger
pro stock
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pro stock
Joined: Sep 2003
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Netherlands
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140gph will be not enough if you ask me. No way an expert but when I first put my 700hp Hemi in I had a 140gph pump too which wasn't big enough. It handled 1st gear but shifting into 2nd the pressure felt down at around 3k's of rpm. Wait a sec and it came back for a while but in all the gears it gave up at higher rpm's. Installed a 280 pump and troubles were gone.
Hope this helps.
'
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Re: Upgrading Fuel Lines etc...
[Re: 72Challenger]
#180469
01/01/09 03:50 PM
01/01/09 03:50 PM
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moparniac
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Quote:
140gph will be not enough if you ask me. No way an expert but when I first put my 700hp Hemi in I had a 140gph pump too which wasn't big enough. It handled 1st gear but shifting into 2nd the pressure felt down at around 3k's of rpm. Wait a sec and it came back for a while but in all the gears it gave up at higher rpm's. Installed a 280 pump and troubles were gone.
Hope this helps.
when you save gave up are you refering to like falling on its face as my car was doing that on the higher revs last time out when I was making about 670HP ... 3800lb challenger btw
also what about the fitting size vs reg port size???
Last edited by wedgeOmatic; 01/01/09 03:55 PM.
Mopar Performance
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Re: Upgrading Fuel Lines etc...
[Re: moparniac]
#180470
01/01/09 04:54 PM
01/01/09 04:54 PM
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Joined: Mar 2007
Posts: 3,285
West Coast, USA
jbc426
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If you're using the 1/2 inch replacement pick-up, cut off the bung-flare on the end of the pick-up and use a 1/2" line adapter to #10 fitting. You can run #10 line through a pre-filter to your pump, then a #10 line to a new regulator with a #10 inlet. While you're at it, think about running a #8 or bigger bypass return line to your tank. While not ideal for several reasons, it will flow a lot of fuel under most conditions.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Upgrading Fuel Lines etc...
[Re: moparniac]
#180471
01/01/09 05:36 PM
01/01/09 05:36 PM
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Joined: Aug 2003
Posts: 43,228
Bend,OR USA
Cab_Burge
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Posts: 43,228
Bend,OR USA
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Quote:
When I go half inch sending unit and line to the regulator is it okay to keep my 3 port 6an aeromotive regulator and put like a fitting in the bottom of the reg for the half inch line??? or get the proper fitting regulator.
Also is 140gph enough for about 725-750hp
thx
#1, if you can find a fitting that has the same or larger inside diameter of the new 1/2 line (it may be smaller than 1/2 inch or .500 inside diameter) then it would be okay if I was doing it, if you can't find a fitting that is the same or larger I.D. then maybe you can drill or have that fitting enlarge so it matches the line I.D.
#2 I know that there are a lot of racers that went real fast with that size pump, but there are other racers with similar combination as them with a better feul delivery system that went faster  My Duster had a Magnafuel 275 pump (good to 750HP according to Magna fuel, my motor made 612 HP first time on the dyno, I upgraded the heads, crankshaft and compression and it made 718 HP the second time on the dyno  ) with a #10 feed line from the tank and a #8 (same ID as a 1/2 line) to the front with a BG four port regulator, the Magnafuel pumps uses a #8 line for the by pass from the pump back into the tank. The car drove fine on the street and went 10:34 ET at the track, no indication of fuel starvation that I could see or feel  I put a LM1 wide ban on the car and found out that the AFR on a run started at 14.1 and leaned out to 15.3 at the end of the run  I jetted the carbs (6 pak) up and the AFR stayed the same  I then replaced just the pump with a Magnafuel 300 pump and the AFR then went to 12.1 to 12.3 for the entire run, which made the car slow down  I should have bought the Magnafuel 500 pump the second time as I am now ready to put a bigger, higher compression, higher RPM motor in the car, pray for me  My message is buy the best pump you think you will ever need now and don't buy it later, same on upgrading all of the rest of the fuel system 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Upgrading Fuel Lines etc...
[Re: Cab_Burge]
#180472
01/01/09 05:57 PM
01/01/09 05:57 PM
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moparniac
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thx cab.. what about the fram canister filter it has -6an I believe...
I see aeroquip makes 3/8 npt to -10 an.. use that ???
-8 is equivilant to 1/2 right... and thats the sending unit im gonna use..
Last edited by wedgeOmatic; 01/01/09 06:02 PM.
Mopar Performance
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Re: Upgrading Fuel Lines etc...
[Re: moparniac]
#180474
01/01/09 09:25 PM
01/01/09 09:25 PM
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Joined: Aug 2003
Posts: 43,228
Bend,OR USA
Cab_Burge
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Get a better fuel filter or add another Fram in parellel with the existing one off of another feed from the tank, IE two 3/8 pick ups from the tank or one 1/2 pick up to a better filter that will flow at least 300 GPH. On the fittings on the regulator get a 3/8 pipe to #8 AN adapter nipple to use on regulator to the 1/2 line from the pump. Also get several #8 tubing sleeves and nuts so you can make the connection a solid one from the 1/2 line to the regulator and pump You can use stainless flex covered fuel lines also but I try to use as much solid aluminum line as I can, it won't deterierate and leak like a lot of the stainless neopreme stainless flex hoses do If you use the stainless covered teflon hoses instead of neopreme you would be better off but they don't flex as easy going sround sharp corners so the choice is yours, BTW all of the AN fittings have to match the type of hose your going to use if you decide to make up your own up instead of buying the ready made ones. I make up my own so it fits exactly like I want them to 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Upgrading Fuel Lines etc...
[Re: Cab_Burge]
#180475
01/01/09 10:27 PM
01/01/09 10:27 PM
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Joined: Feb 2007
Posts: 6,295
U.S.
moparniac
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thx cab I already have made my own 6an stuff...
why run 2 frams side by side though?
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Re: Upgrading Fuel Lines etc...
[Re: RobX4406]
#180477
01/01/09 11:14 PM
01/01/09 11:14 PM
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moparniac
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Quote:
Those fram filters only flow about 90GPH. You need two of them for a 140 pump.
why would 2 help it out though ??? who makes a better filter...
thx
Last edited by wedgeOmatic; 01/01/09 11:15 PM.
Mopar Performance
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Re: Upgrading Fuel Lines etc...
[Re: sixpackgut]
#180482
01/02/09 07:05 AM
01/02/09 07:05 AM
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Joined: Jan 2003
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Quicktree
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Quote:
Quote:
Those fram filters only flow about 90GPH. You need two of them for a 140 pump.
i have never heard that before. i need to investigate that now
Edt: sure enough, thats correct. got to get that of my car now 
it is true but have you ever had a fuel delivery problem running one? I have run more hp than what you have through just one of them with no problem at all. are there other filters that are better? yes. now if you plan on running your NOS just run a new line and seperate system. check with Monte..
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Re: Upgrading Fuel Lines etc...
[Re: moparniac]
#180486
01/02/09 12:54 PM
01/02/09 12:54 PM
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Joined: Jan 2003
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Quicktree
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Quote:
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Those fram filters only flow about 90GPH. You need two of them for a 140 pump.
i have never heard that before. i need to investigate that now
Edt: sure enough, thats correct. got to get that of my car now
it is true but have you ever had a fuel delivery problem running one? I have run more hp than what you have through just one of them with no problem at all. are there other filters that are better? yes. now if you plan on running your NOS just run a new line and seperate system. check with Monte..
no i havn't had any problems. and i'm going to use an enrichment fuel system for NOS but now that is something that will be on my mind till i do something about it. if it flows 90 and i have a 140 pump, what good is the pump then? and i cant run 2 like suggested
yep gut I am wondering the same thing.... like i said last time at the track it was falling on its face on the higher rpms like the guy posted earlier... maybe thats part of it... and im getting cnc'd indys now
ok you two, how many gph can you flow past your needle and seat?
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