thoughts on fuel pumps?
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
thoughts on fuel pumps?
my summit brand 140 gph electric fuel pump quit. the same pump is $86 at summit now, an di will probably go that route just for ease of reinstallation. But, money is tight and my electric system is struggling to keep up with all this stuff (electric igniton, electric dual fans a mess of guages etc). So, i'm considering lower flowing electric pumps or even going back to a mechanical pump.
Summit offers a 95 ghp electric pump that should drop in to my system for $60, and they offer a few mechanical pumps for as low as $40. The carter mecanical pump $40 flows 120gph, which should be adequate, but would require some plumbing work, i suspect.
my motor:
428 stroked/bore to 446 cubes
.600 lift hydraulic roller setup
edelbrock aluminum heads and Cobra jet size valves
etc etc
all motor HP is about 475, and i occasionally spray 100 HP nitrous
Anybody running a mechanical fuel pump in this horsepower range succesfully? any other thoughts?
greg
i smell like gas :-(
Summit offers a 95 ghp electric pump that should drop in to my system for $60, and they offer a few mechanical pumps for as low as $40. The carter mecanical pump $40 flows 120gph, which should be adequate, but would require some plumbing work, i suspect.
my motor:
428 stroked/bore to 446 cubes
.600 lift hydraulic roller setup
edelbrock aluminum heads and Cobra jet size valves
etc etc
all motor HP is about 475, and i occasionally spray 100 HP nitrous
Anybody running a mechanical fuel pump in this horsepower range succesfully? any other thoughts?
greg
i smell like gas :-(
Elder User
Joined: Mar 2004
Posts: 747
Likes: 0
From: Klamath Falls OR
my summit brand 140 gph electric fuel pump quit. the same pump is $86 at summit now, an di will probably go that route just for ease of reinstallation. But, money is tight and my electric system is struggling to keep up with all this stuff (electric igniton, electric dual fans a mess of guages etc). So, i'm considering lower flowing electric pumps or even going back to a mechanical pump.
Summit offers a 95 ghp electric pump that should drop in to my system for $60, and they offer a few mechanical pumps for as low as $40. The carter mecanical pump $40 flows 120gph, which should be adequate, but would require some plumbing work, i suspect.
my motor:
428 stroked/bore to 446 cubes
.600 lift hydraulic roller setup
edelbrock aluminum heads and Cobra jet size valves
etc etc
all motor HP is about 475, and i occasionally spray 100 HP nitrous
Anybody running a mechanical fuel pump in this horsepower range succesfully? any other thoughts?
greg
i smell like gas :-(
Summit offers a 95 ghp electric pump that should drop in to my system for $60, and they offer a few mechanical pumps for as low as $40. The carter mecanical pump $40 flows 120gph, which should be adequate, but would require some plumbing work, i suspect.
my motor:
428 stroked/bore to 446 cubes
.600 lift hydraulic roller setup
edelbrock aluminum heads and Cobra jet size valves
etc etc
all motor HP is about 475, and i occasionally spray 100 HP nitrous
Anybody running a mechanical fuel pump in this horsepower range succesfully? any other thoughts?
greg
i smell like gas :-(
Last edited by Ford428CJ; Dec 14, 2008 at 05:58 PM. Reason: not right
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Hey Greg! Long time no type!
What about the extra power required to run the mechanical pump vs. electric? (oh wait, there goes that "physics" thing and conservation of energy)
Never mind...
With your voltage problems, that might be WHY the electric pump failed. Too little voltage, the motor overheats.
I'd look into mechanical... but if you do that, you're going to remove the regulator? And have to readjust the floats in the carb?
What about the extra power required to run the mechanical pump vs. electric? (oh wait, there goes that "physics" thing and conservation of energy)
Never mind...With your voltage problems, that might be WHY the electric pump failed. Too little voltage, the motor overheats.
I'd look into mechanical... but if you do that, you're going to remove the regulator? And have to readjust the floats in the carb?
Elder User
Joined: Mar 2004
Posts: 747
Likes: 0
From: Klamath Falls OR
Well lets find out how he has it hooked up! Cant give a straight answer without the whole story..... Too many people make the mistake of running it off the key with out a relay. That would put a strain on the pump and cause it to fail.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
He also had voltage problems with an alternator that was too small to keep up with the load, so his primary voltage was dropping below 12 volts anyway if I recall correctly.
Even with a relay, he might be straining that pump too much.
Even with a relay, he might be straining that pump too much.
Elder User
Joined: Mar 2004
Posts: 747
Likes: 0
From: Klamath Falls OR
I use to run mechanical pumps. IMO they become a pain in the azz as well. If you let them sit, you got to crank the crap out of them. I like to turn on the key for a few seconds (10 sec or so) and fire it up! I have run E pumps for years. I use a Carter 4600HP pump with noooo problems. (Diesel or gas). Great pump! That includes my Solid Roller cammed 428 in my Blue Beast....
Trending Topics
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
And make sure he has LARGE feed wire from the alt to the battery. 6ga or larger? That little 12 ga wire in the stock wiring harness won't allow enough current to keep up with a bigger alternator and you'll be in the same boat.
I have a similar situation in my race car. I have a custom 130A alt., but the feed wire is only a 10ga? and it still won't keep up with the demand. My voltmeter reads 11v when everything is powered up(MSD, 140gph Mallory pump, elec water pump, single elec. fan) at idle. This winter I'm going to upgrade that wire to something around a 4-6ga wire in hopes it will then keep up with output of alt.
One think I like about my pump is it's a return line system. I think it's ALOT easier on the motor when it is able to run full speed then being dead headed against a regulator. Likely run alot cooler.
Something to also consider is the Nitrous. You GOT TO HAVE FUEL or you'll be very sorry. If you do run a mech. pump, make sure you have a pressure guage within site to keep eyes on things when you hit the button.
Something to think about.
I have a similar situation in my race car. I have a custom 130A alt., but the feed wire is only a 10ga? and it still won't keep up with the demand. My voltmeter reads 11v when everything is powered up(MSD, 140gph Mallory pump, elec water pump, single elec. fan) at idle. This winter I'm going to upgrade that wire to something around a 4-6ga wire in hopes it will then keep up with output of alt.
One think I like about my pump is it's a return line system. I think it's ALOT easier on the motor when it is able to run full speed then being dead headed against a regulator. Likely run alot cooler.
Something to also consider is the Nitrous. You GOT TO HAVE FUEL or you'll be very sorry. If you do run a mech. pump, make sure you have a pressure guage within site to keep eyes on things when you hit the button.
Something to think about.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
I ordered the same pump, just for ease of reinstall.
I have a relay system, with 12 gauge wire to the pump. I also run a 100amp alternator. I recently added a 10 gauge wire to the alternator (so, 10 and 12 in there now). I will probably upgrade in the future, but it is tight for space between the alternator and block on my rig. be easy to short out the alternator back there.
my old pump has always been noisy. maybe it wasn't good from the beginning.
I'll let you know ho it goes with the new pump.
greg
I have a relay system, with 12 gauge wire to the pump. I also run a 100amp alternator. I recently added a 10 gauge wire to the alternator (so, 10 and 12 in there now). I will probably upgrade in the future, but it is tight for space between the alternator and block on my rig. be easy to short out the alternator back there.
my old pump has always been noisy. maybe it wasn't good from the beginning.
I'll let you know ho it goes with the new pump.
greg
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
If it was like any ol Holley Blue pumps I've seen in the past....they all HUM pretty loud, especially when dead headed at idle(low volume). Make sure to mount the pump using a piece of innertube between mount and body/frame to help eliminate noise.
Buddy years back had his mounted on the firewall and you COULDN'T hear the radio over that stupid thing!!
Buddy years back had his mounted on the firewall and you COULDN'T hear the radio over that stupid thing!!
Thread Starter
|
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
sounds like my pump :-) I mounted it in the frame c-channel with a sheet of rubber in the channel to insulate it. it was still real loud. I'll try to do more to quiet the next pump down if possible. it's well be low the tank outlet with a -10an feed. should be very adequate feed there. feed is also at teh bottom and rear of the tank, as it is a fuel cell for racing.
the pump may have seen low voltage in it's life, due to my electric system woes.
not long ago i chaged teh thermostat to a 162, and that helps keep teh truck cooler. I recently adjusted the fan thermostat to let teh truck run a little warmer before coming on. that seems to have helpd with teh electric system.
the pump may have seen low voltage in it's life, due to my electric system woes.
not long ago i chaged teh thermostat to a 162, and that helps keep teh truck cooler. I recently adjusted the fan thermostat to let teh truck run a little warmer before coming on. that seems to have helpd with teh electric system.
If it was like any ol Holley Blue pumps I've seen in the past....they all HUM pretty loud, especially when dead headed at idle(low volume). Make sure to mount the pump using a piece of innertube between mount and body/frame to help eliminate noise.
Buddy years back had his mounted on the firewall and you COULDN'T hear the radio over that stupid thing!!
Buddy years back had his mounted on the firewall and you COULDN'T hear the radio over that stupid thing!!
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
My '69 has twin electrics on it and after years of just using a toggle switch I finally put a thermo switch on it this past spring. Well, to my amazement, one day I drove it all over and the fan ran most of the time. By evening I stopped for fuel and tried to start the truck. Nadda! "click--grunt" was all I got. *#^&$(* By chance a fellow I knew stopped for gas and gave me a hand bump starting it. Come to find out those two fans were killing my battery and the alt wasn't keeping up(I have a voltmeter and saw it wasn't doing well, but never had a problem before).
I've since unwired the one fan and put it back on the toggle switch leaving one on the thermo switch. It keeps it cool enough during the summer that I only use the second one "IF" I get stuck in traffic too long or such. I also noticed my voltmeter stays over 12volt while the one runs so now I'm not killing my battery.
I've since unwired the one fan and put it back on the toggle switch leaving one on the thermo switch. It keeps it cool enough during the summer that I only use the second one "IF" I get stuck in traffic too long or such. I also noticed my voltmeter stays over 12volt while the one runs so now I'm not killing my battery.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
COE carbs 
... Bolted to the shock/strut tower, it really made a WHOLE lot of noise that reverberated through the entire car. I had to get industrious with rubber mounts to get the noise down to something reasonable.
Thread
Thread Starter
Forum
Replies
Last Post
chad.deraps
1973 - 1979 F-100 & Larger F-Series Trucks
17
Sep 15, 2012 09:26 PM
jbirdsvt
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
3
Mar 3, 2008 07:58 AM
gtex
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
11
Jan 14, 2005 12:04 PM