help with fuel pump...carb guys please help!!!

vande97 · 03-13-2002, 02:18 PM

well i am doing a carb conversion to my car right now. I am wondering if i can use the stock fuel pump that is in it right now?? some people say not to run that fule pump because it is to much pressure for the carb well i was wondering if i use a AFR will i be ok. the carb is a 750 and i will be also running NOS proble a 100 to 150 shot and was thining i am going to need more fuel for the NOS anyway so why not just stick with the stock pump. also i dont plan on running a return line , but if i need to i will. let me know

thanks alot

vande

mean81GT · 03-13-2002, 02:24 PM

with the nos, you will need more volume, but not pressure. a carb takes anywhere from 6-10 psi for the power you are going to run. you can probably run the pump you have now, but you need to get a fuel pressure regulator designed for carbs. then you can use the return line that should already be there to get the excess back to the tank.

I run a holley "red" pump. I think it runs 10 psi, and i have it regulated back to 6 psi.

hope this helps.

drudis · 03-13-2002, 02:44 PM

No, the stock pump will do 40+ psi. The regulator wont hold back that much pressure.

Getthe Holley RED pump, as that is 10psi. THe Holley BLUE is like 14psi, and comes with one regulator, but is more expensive. Thats what I used on my 351-W Zephyr with 125shot nitrous
As seen on my Zephyr page: http://www.dariusrudis.com/mustang/zephyr/

vande97 · 03-13-2002, 02:47 PM

so you think there is no way to use the stock efi pump to run the NOS ... even if i just dump a 100 shot to it???
do i just run the return line off the regulator?

thanks again

drudis · 03-13-2002, 03:10 PM

Quote:

Originally posted by vande97
so you think there is no way to use the stock efi pump to run the NOS ... even if i just dump a 100 shot to it???
do i just run the return line off the regulator?

thanks again

Correct, no way to use stock EFI pump (IMOHO). Just get the external Holley pump. You will need to get the fuel out of the gas tank (new suction line)... and will not need the return line as the Holley regulator is a "dam", and stops the flow, not recirculate it back.

p.s. My combo, I ran 1 Holley blue pump. Y-split it into TWO regulators. One 7psi for the Holley 780, and one for the Nitrous line.

7000rpmisheaven · 03-13-2002, 04:01 PM

What carb will you be running. I run the edelbrock and it says it likes 5.5 psi. Do you have a fuel pressure gauge? It would be helpful for tuning purposes to have one that has a scale of 1-15 psi.

Eric4Nitrous · 03-13-2002, 08:11 PM

I use two separate fuel pumps on my car. One holley blue, and a mallory dual stage fuel pump. Of course I run alot of nitrous, so That's the need for the two pumps. But if i was you, i wouldn't get the holley "red". Their junk. The holley blue cost more but is worth the price.

RoadWarrior · 03-13-2002, 09:04 PM

i would definately go with the holley blue pump. Thats what i got for my car and i love it. Plus when you get into nitrous and other mods it can handle the extra fuel needs. Plus it comes with a regulator. But get a pressure gauge so you can tune it. I run mine at around 9psi with a edelbrock 600cfm carb. And spend the extra couple dollars and get a liquid filled gauge, that way it doesnt bounce around all the time.

1BAD89 · 03-13-2002, 10:03 PM

I'm running a Holley "blue" pump on my truck.

PKRWUD · 03-14-2002, 09:56 PM

I also ended up with a Holley blue pump after alot of trial and error on my 403. I had the pump mounted by the tank, and ran a line to a splitter in the engine compartment. From there, one line went to a regulator and then to the carb, while the other line went to an additional inline electric pump, and then to my NOS solenoid. The NOS inline pump was turned on when I made my NOS button active. I flipped a switch which gave power to the NOS pump and both solenoids, and made the button on my shifter handle "live". Pressing that button activated the solenoids. I never added a regulator to the NOS gasoline line, and never had any problems. Then again, that line only had added pressure when I flipped the "pre-juice" switch just prior to use. I don't know that the added inline pump was even necessary, but it was recommended by a friend, so I just installed it anyway. I never had any problems.

Even though the blue pump has a built in regulator, you should still add an external regulator in the engine compartment, IMHO. A gauge mounted to the fuel rail is a "must have" in my book too.

Take care,
-Chris

vande97 · 03-15-2002, 12:37 AM

thank u so much guys for the help!!!! , i see what i must do now. just one more ? for ya , i want to run a 750 holley but am not sure if this will be 2 much carb for the car? the motor is a fresh 306 with a mild cam (just about the same as the FMS b cam) edel heads 6022, 10.5/1 compression pistons, Torker 2 intake. Do you think that a 750 will be to much and not perform well. should i go to a 650 instead???

vande

PKRWUD · 03-15-2002, 02:28 AM

I'd stick with the 750. If it proves to be too much, you can always downsize the jets and change the accelerator pump cams and power valve to compensate for it.

Take care,
-Chris

Oldschoolpony · 03-15-2002, 09:26 AM

Running a holley blue. And installing nitros, but sticking with 1 pump and a LARGE fuel line. upgradeing to a very large pump. wouldnt use 2 on a nos system, if the wrong pump quits/fails durring a run, you're toast!!!!!!!

Dark Knight · 03-17-2002, 11:55 AM

I never liked the blue pumps... they never lasted long for me... loud too.... got a mallory and the thing has lasted for years... and it came with a billet regulator....

BTW, why the torker 2? they suck... ;-)

PKRWUD · 03-17-2002, 05:29 PM

D.K.-
Really? That's wild. I've had the exact opposite results, as far as durability goes. Actually, the blue pumps usually need rebuilding after 15k miles, but I've never seen a Mallory last for more than 5k. The blue pumps are loud, but that can be a good thing.

Take care,
-Chris

vande97 · 03-17-2002, 09:18 PM

D.K?? hmmm, the torker intake sucks huh, why is that??? Hey PKRWUD, hey you ever had experience with a torker 2 intake. That's not what i like to hear(it sucks) but what other intake should i consider for my combo I was told that the torker was a good intake to run A NOS plate system.

thanks

vande

PKRWUD · 03-18-2002, 06:05 AM

The original Torker was a cool intake, but I haven't been thrilled with the Torker 2. It really depends on what kind of driving you are planning on doing. Odds are that you would be better suited to buy an RPM manifold instead. They flow almost exactly the same, but the RPM's plenum is higher. More importantly, the RPM is a dual plane intake, which will give you MUCH better throttle response and drivability, while still having a higher rpm potential than you will likely reach (6500 rpm, I believe). If this car is going to be a daily driver, you REALLY SHOULD get the RPM. If it's a trailer queen, then a Torker would work best. Anywhere inbetween is up to you. Just remember that for a vehicle that will see regular driving as well, you can't beat the RPM intake.

IMO.

Take care,
-Chris

vande97 · 03-18-2002, 01:55 PM

Well this maybe a real stupid question but can i still run a Nos plate system with the RPM intake?, I thought I would need to have a open Bore Plenium for the spray bars for the juice. That is why i wanted to go witht the torker. But If i can run the juice with the RPM i will proble get it. Also could i add a carb spacers to the intake to help out air Flow? I will proble only running this car on the track but maybe on the weekend i will get her out. thanks again

vande

PKRWUD · 03-21-2002, 07:35 PM

You can use a nitrous plate with a dual plane intake. Adding a spacer will increase the size of the plenum, which isn't really necessary in 1/4 mile racing, but could be a benefit for velocity. If you are planning on this being mostly a track driven car, then go ahead and get a Torker.

Take care,
-Chris

Oldschoolpony · 03-21-2002, 08:02 PM

I've had alot of luck with single plane intakes, even in the lower rpm area. My last motor, an FE ran a ported offenhauser portosonic, my mustang has a vic jr intake. one of my work trucks is however running a performer intake.

03-13-2002, 02:18 PM	#1
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	help with fuel pump...carb guys please help!!! well i am doing a carb conversion to my car right now. I am wondering if i can use the stock fuel pump that is in it right now?? some people say not to run that fule pump because it is to much pressure for the carb well i was wondering if i use a AFR will i be ok. the carb is a 750 and i will be also running NOS proble a 100 to 150 shot and was thining i am going to need more fuel for the NOS anyway so why not just stick with the stock pump. also i dont plan on running a return line , but if i need to i will. let me know thanks alot vande

03-13-2002, 02:24 PM	#2
mean81GT Registered Member Join Date: Nov 2001 Location: NY Posts: 299	with the nos, you will need more volume, but not pressure. a carb takes anywhere from 6-10 psi for the power you are going to run. you can probably run the pump you have now, but you need to get a fuel pressure regulator designed for carbs. then you can use the return line that should already be there to get the excess back to the tank. I run a holley "red" pump. I think it runs 10 psi, and i have it regulated back to 6 psi. hope this helps. __________________ I'm a glutton for punishment.

03-13-2002, 02:44 PM	#3
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	No, the stock pump will do 40+ psi. The regulator wont hold back that much pressure. Getthe Holley RED pump, as that is 10psi. THe Holley BLUE is like 14psi, and comes with one regulator, but is more expensive. Thats what I used on my 351-W Zephyr with 125shot nitrous As seen on my Zephyr page: http://www.dariusrudis.com/mustang/zephyr/ __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

03-13-2002, 04:01 PM	#6
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	What carb will you be running. I run the edelbrock and it says it likes 5.5 psi. Do you have a fuel pressure gauge? It would be helpful for tuning purposes to have one that has a scale of 1-15 psi. __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

03-13-2002, 08:11 PM	#7
Eric4Nitrous Registered Member Join Date: Jan 2002 Location: Va Posts: 1,122	I use two separate fuel pumps on my car. One holley blue, and a mallory dual stage fuel pump. Of course I run alot of nitrous, so That's the need for the two pumps. But if i was you, i wouldn't get the holley "red". Their junk. The holley blue cost more but is worth the price. __________________ 68 Camaro Gene Fulton 632ci Two stages of Jug 8.41 164mph Rockingham 1-26-03

03-13-2002, 02:47 PM	#4
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	so you think there is no way to use the stock efi pump to run the NOS ... even if i just dump a 100 shot to it??? do i just run the return line off the regulator? thanks again

03-13-2002, 09:04 PM	#8
RoadWarrior Registered Member Join Date: Apr 2000 Location: Edmonton,Alberta,Canada Posts: 317	i would definately go with the holley blue pump. Thats what i got for my car and i love it. Plus when you get into nitrous and other mods it can handle the extra fuel needs. Plus it comes with a regulator. But get a pressure gauge so you can tune it. I run mine at around 9psi with a edelbrock 600cfm carb. And spend the extra couple dollars and get a liquid filled gauge, that way it doesnt bounce around all the time.

03-13-2002, 10:03 PM	#9
1BAD89 Tubbed and Juiced Join Date: Mar 2001 Location: Tulsa, Oklahoma Posts: 1,861	I'm running a Holley "blue" pump on my truck.

03-14-2002, 09:56 PM	#10
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	I also ended up with a Holley blue pump after alot of trial and error on my 403. I had the pump mounted by the tank, and ran a line to a splitter in the engine compartment. From there, one line went to a regulator and then to the carb, while the other line went to an additional inline electric pump, and then to my NOS solenoid. The NOS inline pump was turned on when I made my NOS button active. I flipped a switch which gave power to the NOS pump and both solenoids, and made the button on my shifter handle "live". Pressing that button activated the solenoids. I never added a regulator to the NOS gasoline line, and never had any problems. Then again, that line only had added pressure when I flipped the "pre-juice" switch just prior to use. I don't know that the added inline pump was even necessary, but it was recommended by a friend, so I just installed it anyway. I never had any problems. Even though the blue pump has a built in regulator, you should still add an external regulator in the engine compartment, IMHO. A gauge mounted to the fuel rail is a "must have" in my book too. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-15-2002, 12:37 AM	#11
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	thank u so much guys for the help!!!! , i see what i must do now. just one more ? for ya , i want to run a 750 holley but am not sure if this will be 2 much carb for the car? the motor is a fresh 306 with a mild cam (just about the same as the FMS b cam) edel heads 6022, 10.5/1 compression pistons, Torker 2 intake. Do you think that a 750 will be to much and not perform well. should i go to a 650 instead??? vande

03-15-2002, 02:28 AM	#12
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	I'd stick with the 750. If it proves to be too much, you can always downsize the jets and change the accelerator pump cams and power valve to compensate for it. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-15-2002, 09:26 AM	#13
Oldschoolpony Registered Member Join Date: Mar 2001 Location: Gainsville,Fl Posts: 229	Holley blue Running a holley blue. And installing nitros, but sticking with 1 pump and a LARGE fuel line. upgradeing to a very large pump. wouldnt use 2 on a nos system, if the wrong pump quits/fails durring a run, you're toast!!!!!!! __________________ http://www.mustangworks.com/cgi-bin/...splay.cgi?1546

03-17-2002, 11:55 AM	#14
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	I never liked the blue pumps... they never lasted long for me... loud too.... got a mallory and the thing has lasted for years... and it came with a billet regulator.... BTW, why the torker 2? they suck... ;-) __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

03-17-2002, 05:29 PM	#15
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	D.K.- Really? That's wild. I've had the exact opposite results, as far as durability goes. Actually, the blue pumps usually need rebuilding after 15k miles, but I've never seen a Mallory last for more than 5k. The blue pumps are loud, but that can be a good thing. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-17-2002, 09:18 PM	#16
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	D.K?? hmmm, the torker intake sucks huh, why is that??? Hey PKRWUD, hey you ever had experience with a torker 2 intake. That's not what i like to hear(it sucks) but what other intake should i consider for my combo I was told that the torker was a good intake to run A NOS plate system. thanks vande

03-18-2002, 06:05 AM	#17
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	The original Torker was a cool intake, but I haven't been thrilled with the Torker 2. It really depends on what kind of driving you are planning on doing. Odds are that you would be better suited to buy an RPM manifold instead. They flow almost exactly the same, but the RPM's plenum is higher. More importantly, the RPM is a dual plane intake, which will give you MUCH better throttle response and drivability, while still having a higher rpm potential than you will likely reach (6500 rpm, I believe). If this car is going to be a daily driver, you REALLY SHOULD get the RPM. If it's a trailer queen, then a Torker would work best. Anywhere inbetween is up to you. Just remember that for a vehicle that will see regular driving as well, you can't beat the RPM intake. IMO. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-18-2002, 01:55 PM	#18
vande97 Registered Member Join Date: Jan 2001 Location: okemos Posts: 205	Well this maybe a real stupid question but can i still run a Nos plate system with the RPM intake?, I thought I would need to have a open Bore Plenium for the spray bars for the juice. That is why i wanted to go witht the torker. But If i can run the juice with the RPM i will proble get it. Also could i add a carb spacers to the intake to help out air Flow? I will proble only running this car on the track but maybe on the weekend i will get her out. thanks again vande

03-21-2002, 07:35 PM	#19
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You can use a nitrous plate with a dual plane intake. Adding a spacer will increase the size of the plenum, which isn't really necessary in 1/4 mile racing, but could be a benefit for velocity. If you are planning on this being mostly a track driven car, then go ahead and get a Torker. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-21-2002, 08:02 PM	#20
Oldschoolpony Registered Member Join Date: Mar 2001 Location: Gainsville,Fl Posts: 229	intake I've had alot of luck with single plane intakes, even in the lower rpm area. My last motor, an FE ran a ported offenhauser portosonic, my mustang has a vic jr intake. one of my work trucks is however running a performer intake. __________________ http://www.mustangworks.com/cgi-bin/...splay.cgi?1546

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel help you guys	kenneth kimble	Windsor Power	13	09-02-2002 10:16 PM
What do i need to switch to carburetion	84LX89GT	Windsor Power	4	08-08-2002 04:22 PM
Fuel Pump ?s	5.0PiMpin	Windsor Power	1	02-13-2002 07:41 AM
Fuel Pump Replacement	KobraLX	Windsor Power	1	07-31-2001 12:44 PM
Carb fuel pump	sknydave	Windsor Power	1	07-07-2001 02:41 PM