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A mech fuel pump that will support this engine combo? #1079854 09/21/11 03:27 PM 09/21/11 03:27 PM
Joined: Nov 2006 Posts: 344 Near Indy S slowpoke OP enthusiast
slowpoke OP enthusiast S Joined: Nov 2006 Posts: 344 Near Indy	As posted elsewhere, I have to replace my leakey fuel tank and want to get rid of my noisey Holly elect pump while I'm at it. Now I'm considering going to a mechanical for ease and quiet... I have a 500" RB in a '68 Charger that is street driven w/ an 870 Holly and 3/8" fuel line and I don't want to lean out when I'm at full throttle. Am looking at a Carter M4862 as well as an Edelbrock EDE-1723. Mancini claims the EBrock pump will support 600 HP, but haven't heard much about it. Anyone have experience with either or have advice on something else? Thanks!

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079855 09/21/11 06:22 PM 09/21/11 06:22 PM
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	don't FAST cars run mech pumps? Not sure if those will but there is a mech pump that will I'm sure. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079856 09/21/11 06:49 PM 09/21/11 06:49 PM
Joined: Feb 2003 Posts: 1,142 Tucson, AZ C cruzin super stock
cruzin super stock C Joined: Feb 2003 Posts: 1,142 Tucson, AZ	I have use used both mechanical pumps on a 470 with a 1/2" line and 825 Demon. I've run this on the strip and never experience any fuel delivery issues. I upgraded to the Edelbrock due to the larger size fittings (1/4 NPT vs 3/8" NPT) found on the Eddy pump.

Re: A mech fuel pump that will support this engine combo? [Re: cruzin] #1079857 09/21/11 07:27 PM 09/21/11 07:27 PM
Joined: Jul 2006 Posts: 4,319 Puyallup, WA S StealthWedge67 master
StealthWedge67 master S Joined: Jul 2006 Posts: 4,319 Puyallup, WA	I Use the Carter 4682 Street / Strip pump drawing through the stock 3/8" line on my 452 in my Satellite. It feeds an 830 DP and I spin the motor to 6500. Car runs 12.0's. While I don't have a visible fuel pressure guage, I've never experienced anything that leads me to believe I'm outrunning the pump. Car runs 112.9 mph, which seems in line with my E.T. LemonWedge - Street heavy / Strip ready - 11.07 @ 120

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079858 09/21/11 07:44 PM 09/21/11 07:44 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	Quote: As posted elsewhere, I have to replace my leakey fuel tank and want to get rid of my noisey Holly elect pump while I'm at it. Now I'm considering going to a mechanical for ease and quiet... I have a 500" RB in a '68 Charger that is street driven w/ an 870 Holly and 3/8" fuel line and I don't want to lean out when I'm at full throttle. Am looking at a Carter M4862 as well as an Edelbrock EDE-1723. Mancini claims the EBrock pump will support 600 HP, but haven't heard much about it. Anyone have experience with either or have advice on something else? Thanks! i've tested both those pumps for pressure and free flow. the carter4862 would pump almost a gallon in 30 seconds and had 9psi. the edelbrock pumped 3/4 gallon in 1 minute with eratic pressure. if i had a thirsty motor the 4862 would be my 1st choice, but the 4862 needs some mods.

Re: A mech fuel pump that will support this engine combo? [Re: lewtot184] #1079859 09/21/11 09:11 PM 09/21/11 09:11 PM
Joined: Jan 2003 Posts: 12,296 Benton, IL. D DaveRS23 Special needs idiot
DaveRS23 Special needs idiot D Joined: Jan 2003 Posts: 12,296 Benton, IL.	Why not keep the electric that you know will feed the engine, just put it on a micro switch on the secondaries. Run most any mechanical that you want. That is the way I run my Cuda. Takes all the guess work out of the mechanical pump. Master, again and still

Re: A mech fuel pump that will support this engine combo? [Re: cruzin] #1079860 09/21/11 10:05 PM 09/21/11 10:05 PM
Joined: Nov 2006 Posts: 344 Near Indy S slowpoke OP enthusiast
slowpoke OP enthusiast S Joined: Nov 2006 Posts: 344 Near Indy	Thanks guys,,, good info here! I was kinda leaning to the Eddy just because of the fitting sizes as well as the 1/4 seemed to choke down the 3/8 line and defeat the purpose, but I guess it's the actual fuel delivery to the carb that counts....as mentioned in one of the replies about "mods needed" for the 4862, what is needed?

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079861 09/21/11 10:53 PM 09/21/11 10:53 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	3/8 pipe vs 1/4 pipe is irrelavant. both have i.d. sizes larger than 3/8 tube or -6 hose i.d.'s. the bottom bowl of the 4892 needs to come off and the inlet passage needs to be drilled to 5/16". radius and deburr all inlets and outlets. its pretty simmple to do.

Re: A mech fuel pump that will support this engine combo? [Re: lewtot184] #1079862 09/21/11 11:19 PM 09/21/11 11:19 PM
Joined: Nov 2006 Posts: 344 Near Indy S slowpoke OP enthusiast
slowpoke OP enthusiast S Joined: Nov 2006 Posts: 344 Near Indy	Why does it need drilled??

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079863 09/22/11 01:28 AM 09/22/11 01:28 AM
Joined: Jan 2011 Posts: 4,785 Utah and Alaska astjp2 master
astjp2 master Joined: Jan 2011 Posts: 4,785 Utah and Alaska	They drill them to open them up for more flow. I am going to run a race pumps piston pump. More change$ but it will fit my mega block. Tim

Re: A mech fuel pump that will support this engine combo? [Re: astjp2] #1079864 09/22/11 08:34 AM 09/22/11 08:34 AM
Joined: Nov 2006 Posts: 344 Near Indy S slowpoke OP enthusiast
slowpoke OP enthusiast S Joined: Nov 2006 Posts: 344 Near Indy	Gotcha...Thanks a bunch! Any other thoughts before I get the Carter?

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079865 09/22/11 09:55 AM 09/22/11 09:55 AM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	the carter and edelbrock (i believe these are made by carter) are 3 piece. the top holds the pump arm, spring, and diaphragm. the center piece has the valves and the bottom bowl is for inlet. the inlet passage in the bottom bowl is 1/4' i.d. and needs to be opened up to 5/15" to match the inlet fuel line. the edelbrock pump has this modification but uses a weaker diaphragm spring and has less pressure and volume. the pump needs to be disassembled to do the mods but its not difficult. i can be pm'ed if help is needed.

Re: A mech fuel pump that will support this engine combo? [Re: lewtot184] #1079866 09/22/11 10:46 AM 09/22/11 10:46 AM
Joined: Nov 2010 Posts: 3,696 jersey S Spaceman Spiff master
Spaceman Spiff master S Joined: Nov 2010 Posts: 3,696 jersey	Stay away from the carter. My self and others have had problems with them stop working. Mine had less than 2000 miles on it before it went. 526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079867 09/22/11 10:59 AM 09/22/11 10:59 AM
Joined: Jan 2003 Posts: 2,059 MD RTSE4ME top fuel
RTSE4ME top fuel Joined: Jan 2003 Posts: 2,059 MD	I have a Clay Smith fuel pump on my 505 RB. It has 1/2" inlet and outlet. In the past you have some grind the pump to clear the block but it looks like they do that for you now. If you notice they have milled a flat spot on the block side of the pump. You will need to run a regulator with this pump. I doubt you will lean out with this pump. http://claysmithcams.com/index.php?route=product/product&path=69&product_id=87 6837426-fuelpump.jpg (147 downloads)

Re: A mech fuel pump that will support this engine combo? [Re: RTSE4ME] #1079868 09/22/11 11:40 AM 09/22/11 11:40 AM
Joined: Nov 2006 Posts: 344 Near Indy S slowpoke OP enthusiast
slowpoke OP enthusiast S Joined: Nov 2006 Posts: 344 Near Indy	Wow that looks like a heckuva pump!! Will definitely look into that one as well. Thanks for the info! One more question- can anyone recommend a good quality pump rod??? I've seen a lot of discussion on some being soft... Thanks again to everone who responded!!!

Re: A mech fuel pump that will support this engine combo? [Re: slowpoke] #1079869 09/22/11 11:44 AM 09/22/11 11:44 AM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	i found some old oem rods and use them.

Re: A mech fuel pump that will support this engine combo? [Re: Spaceman Spiff] #1079870 09/22/11 02:40 PM 09/22/11 02:40 PM
Joined: Jan 2003 Posts: 21,085 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,085 Niles , Ohio	I agree we had 4 bad Cartes in a row.One lasted abot a week before the arm screwed up and the spring dropped in the pan.One wouldnt even pum right out of the box.Installed Holleys on all 3 motors and no problems.Mine feeds my 440 with a 1050 Dominator and has plenty of fuel.Been at least 7 years since they were installed and still going strong.Rocky Chrysler Firepower

Re: A mech fuel pump that will support this engine combo? [Re: therocks] #1079871 09/23/11 07:44 AM 09/23/11 07:44 AM
Joined: Nov 2006 Posts: 344 Near Indy S slowpoke OP enthusiast
slowpoke OP enthusiast S Joined: Nov 2006 Posts: 344 Near Indy	Thanks for the info!

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