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Fuel pumps - mechanical vs. electric #984180 05/01/11 07:37 PM 05/01/11 07:37 PM
Joined: Jan 2003 Posts: 1,443 7 70duster340 OP pro stock
70duster340 OP pro stock 7 Joined: Jan 2003 Posts: 1,443	I'm sure this has been asked (and debated) here before, but here goes anyway. What are the advantages and disadvantages to each one? I currently run a Carter street pump, but am open to any advice any of you may have. TIA!!!

Re: Fuel pumps - mechanical vs. electric [Re: 70duster340] #984181 05/01/11 08:18 PM 05/01/11 08:18 PM
Joined: Jan 2003 Posts: 1,443 7 70duster340 OP pro stock
70duster340 OP pro stock 7 Joined: Jan 2003 Posts: 1,443	Nobody???

Re: Fuel pumps - mechanical vs. electric [Re: 70duster340] #984182 05/01/11 08:58 PM 05/01/11 08:58 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	An electric mounted near the tank will pressurize the fuel system in the hot engine compartment and reduce the possibility of vapor lock... which is more of a problem with current gas than it was in the 70's. Electric is commonly available in higher output vs conventional mechanical. Downsides of electric are noise, cost, complexity.

Re: Fuel pumps - mechanical vs. electric [Re: ahy] #984183 05/01/11 09:22 PM 05/01/11 09:22 PM
Joined: Mar 2005 Posts: 3,138 Central NC gch master
gch master Joined: Mar 2005 Posts: 3,138 Central NC	Your average street car doesent NEED an elec fuel pump.Many mild bracket cars will run fine on a mech pump also. If you run a smallish (factory)fuel line on a hopped up muscle car an elec pump may keep you out of starvation at higher rpms. Any nitrous car should run an elec pump (or two).

Re: Fuel pumps - mechanical vs. electric [Re: 70duster340] #984184 05/01/11 11:13 PM 05/01/11 11:13 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: I'm sure this has been asked (and debated) here before, but here goes anyway. fire away there is no quota here . As said electric: bad is the noise (need to insulate it)/long wiring to it. Good is it combats vapor lock & would prob let you run a return line for that prob also and gives alot of GPH (w a large line). If you can flow enough w a mechanical that'd b the way to go for simplicity & some of em flow alot. I used a stock parts house low po "airtex" w 5/16" lines on a circle burner SB 360 (9-1) CR 2bbl (class rules) w no starvation issues at 6300 RPM at WOT though I went to a 3/8 line and drilled out/added 3/8" nipples in the in/out barrels on the airtex just to make sure that I wasn't getting starved though I confirmed that w a psi reading & there was no change so the b 4 setup was adequate. Mech is adequate in most cases & much better to deal w/setup Last edited by RapidRobert; 05/01/11 11:15 PM. live every 24 hour block of time like it's your last day on earth

Re: Fuel pumps - mechanical vs. electric [Re: RapidRobert] #984185 05/02/11 11:52 PM 05/02/11 11:52 PM
Joined: Jan 2003 Posts: 1,443 7 70duster340 OP pro stock
70duster340 OP pro stock 7 Joined: Jan 2003 Posts: 1,443	Thanks for the replies so far. I was asking because I was curious if maybe it freed up some horsepower, and also was maybe a bit more dependable than the mechanical pumps. Not that I have experienced any issues with my Carter pump, but I am just in search of the best setup.

Re: Fuel pumps - mechanical vs. electric [Re: 70duster340] #984186 05/03/11 03:18 AM 05/03/11 03:18 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	I always run an electric pump on my hotrods. I just use a block-off plate where the stock fuel pump goes and use just electric. I like it for keeping vapor lock down and for filling the carb bowls as soon as the key is turned on. And it works good if you like to race your car now and then. Ron

Re: Fuel pumps - mechanical vs. electric [Re: 70duster340] #984187 05/03/11 08:09 AM 05/03/11 08:09 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	both will work, depends on your fuel needs. You really don't need and electric unit until you are in the mid-11's. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: Fuel pumps - mechanical vs. electric [Re: Mr.Yuck] #984188 05/03/11 12:58 PM 05/03/11 12:58 PM
Joined: Jan 2003 Posts: 1,443 7 70duster340 OP pro stock
70duster340 OP pro stock 7 Joined: Jan 2003 Posts: 1,443	Well, I would prefer to avoid the noise, so if there is no real improvement over a mechanical pump, I will stay with what I have.

Re: Fuel pumps - mechanical vs. electric [Re: 383man] #984189 05/03/11 06:02 PM 05/03/11 06:02 PM
Joined: Nov 2004 Posts: 25,050 Texas GoodysGotaCuda 5.7L Hemi, 6spd
GoodysGotaCuda 5.7L Hemi, 6spd Joined: Nov 2004 Posts: 25,050 Texas	Quote: I always run an electric pump on my hotrods. I just use a block-off plate where the stock fuel pump goes and use just electric. I like it for keeping vapor lock down and for filling the carb bowls as soon as the key is turned on. Same here, I will make mine return (instead of dead head) and buy a quieter pump next time...or just make my exhaust louder 1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi 2020 RAM 1500 [img]https://i.imgur.com/v9yezP9.jpg[/img]

Re: Fuel pumps - mechanical vs. electric [Re: GoodysGotaCuda] #984190 05/04/11 09:06 AM 05/04/11 09:06 AM
Joined: Sep 2006 Posts: 277 Palmyra, NY 6 63stabamatic enthusiast
63stabamatic enthusiast 6 Joined: Sep 2006 Posts: 277 Palmyra, NY	I echo all the comments. One thing to keep in mind is in a crash an electric fuel pump may continue to run and make an explosive situation. That always bothered me, even if was run by the ignition switch and you couldn't get to it, so I got a Ron Francis CR-92 crash sensor that will open an electrical connection to the fuel pump in the event of a crash.

Re: Fuel pumps - mechanical vs. electric [Re: 63stabamatic] #984191 05/04/11 05:08 PM 05/04/11 05:08 PM
Joined: Jan 2006 Posts: 587 IL . usa C cjs69mope mopar
cjs69mope mopar C Joined: Jan 2006 Posts: 587 IL . usa	You could also use a oil pressure switch to ground the fuel pump relay so the pump turns off when the motor stalls . I think holley has a diagram for this . 1969 Dodge Charger 1969 Dodge Superbee

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