fuel delivery question, help...? (360 engine)
hi, im new in this forum, i have a 74 charger with a 360 on it, and i am in the process of swaping in two holley 450cfm carburetors, but i want to know if i could use a mechanical fuel pump (if so, what part number) that you would recommend me to supply both carburetors.
Thank's hope someone can help me out. |
by ALL means toss the mech fuel pump. in the past i have used carter elec fuel pump for up to 400 hp. and i think you can get bigger pumps than i used. but why holleys? the old street hemi used 2 carter AFBs. IMHO the AFB is very stable and less trouble on the street than holleys.
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Street car.or Cruiser.. You might get way with it..... Try to find something with at least a 3/8 n.p.t inlet and outlet.... Step up the fuel feed line to 3/8 line.... Pump will need to be about 6.5 psi....
If you cant find that you will need to go electric... :):) |
Both the recommendations are spot on!!! So, welcome to the forum!!! And be sure to check out the Mopar of the Month contest!!!!!
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:look::welcome2: What are the upgrades to the engine???? That is alot of fuel for a stock 360..Bill
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Engine Specs.
Originally Posted by RacerHog
(Post 117440)
Street car.or Cruiser.. You might get way with it..... Try to find something with at least a 3/8 n.p.t inlet and outlet.... Step up the fuel feed line to 3/8 line.... Pump will need to be about 6.5 psi....
If you cant find that you will need to go electric... :):) Reinforced Springs, it used to have a 750 demon carburetor. Is it possible to make it work with a mechanical pump, i mean the idea is to make it a weekend drive car and every now and then take it to the track an burn some, but mostly street driven. |
Originally Posted by pro-tech
(Post 117461)
:look::welcome2: What are the upgrades to the engine???? That is alot of fuel for a stock 360..Bill
some of the engine's upgrades are Keith Black Piston, Molly Piston Rings, Stock but work heads, Roller rockers, CompCams cam, Reinforced Springs, it used to have a 750 demon carburetor. What do you say, you think i can go with a mechanical pump if so, do you recommend me a specific model. |
You can try the carter Hi Perf. Fuel pump......http://www.summitracing.com/parts/cr...FVBffgod5LMAcQ
I just dont like that it has 1/4 fittings myself..... But go with it.. Could be enough? only one way to find out.... :) If the carbs have not been gone threw and still have the small needles and seats, then you should not have any problems with it. But other than that it's a crap shoot. Keep us posted :) |
IMHO at high pressures one or two small parts wont hurt to bad. like racer said oversize lines on rest is the way to go.
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Lucaz -
A high volume Holley mechanical fuel pump will be more than enough. It's one less hassle to worry about. So you want to run 900 CFM on a street 360? Kinda hard to make a call wothout knowing the compression, cam specs and HP expectations. There's really no benefit and more of a hassle than a single 4V Holley, except for an initial "wow" factor. Archer |
Welcome to the forum
the 450's LIST # 9776 are mech. sec. but single pump, They will not work on the street, They are only for leaving the line @ 3000 RPM or more. If you go with 2 holleys for the street go with 2 0-8007 390 CFM vacuum sec. You can use a Holley mech. fuel pump 12-360-11 if you are not over 450 HP, Thanks |
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