Ford Muscle Cars Tech Forum banner

1 - 18 of 18 Posts

·
Registered
Joined
·
5,551 Posts
While those are great pumps, they are loud and aren't designed for forced-induction usage, unless they're used in conjunction with another pump and one of them is for "on the motor" and the other is when the boost comes on or the nitrous is armed.

Also, I highly suggest a bypass-style regulator. They take a HUGE load off of the pump which allows it to run cooler and allows more fuel to reach the carb. Also, depending on where the regulator is mounted, the pressure will react MUCH faster to increased load. I ran a -10 line from the trunk-mounted cell directly to a "tee" in the line (actually 2 "tees"--one at the front bowl, one at the rear) then to a Mallory 4309 regulator, then the -8 return back to the cell. The regulator was mounted at the back of the carburetor and the vacuum line was hooked to the boost tube in order to increase fuel pressure on a 1:1 ratio according to manifold pressure. Never had a single problem, even at 25+ psi boost and over 700 HP, though the block didn't like it too much. 302 blocks are weak!
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #3
Noisy i can live with as long as it will work.

The regulator it comes with is PN-12-803 im not sure if thats ok or will work but the price is nice on the pair.

So one more time this pump will work right?

Summit thinks so but i trust you guys opinions so let me have it.Other than it being noisy will it supply the fuel i need?
 

·
Registered
Joined
·
2,844 Posts
That link didn't work for me?????

Mallory makes the best quiet electric pumps for the average 500hp motor. Return regulator systems are the only thing 99% of peolpe use for motors with nitrous setups.

Its cheaper to do it right the first time.

Good luck
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #7
So how do i use that regulator (OR CAN I) on a return system?

I need help setting up the return line.

What i plan to do is run a new line from the tank to the engine since the stock efi lines are to restrictive.

Will i need to drop the tank to do a return line?

That pump is a 110 GPH holley blue pump and regulator in the link fogged 408.
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #8
Be as specific as possible this has me concerned since the guy at summit was like "NO YOU DONT NEED A RETURN LINE" thats why i had to ask here i just dont trust a desk jockey.
 

·
Registered
Joined
·
2,844 Posts
On 2004-07-09 00:31, TheGmKiller331 wrote:

Will i need to drop the tank to do a return line?

That pump is a 110 GPH holley blue pump and regulator in the link fogged 408.
That regulator is not a return stlye regulator. If in the future you decide to use a return style regulator you would just use the factory EFI return line thats already on the car.

Those holley pumps suck, I have one running my 250shot on the race car and the noise drives me crazy!!!! I can hear it over the 600rwph and open headers...and thats no BS.

CHECK THIS OUT:

Some people "like me" just installing a bigger "in tank" EFI pump "walbro" using the factory gas and return lines but using the mallory 3 port return style regulator to reduce the EFI pressure to 6-7 pounds. Thats how I did my 302 ranger with n2o. No new lines, more flow and less noise than the holley blue with no worrys on were to mount an external pump and never worring about running anything over and hitting the pump.

You can find walbro pumps for your mustang in many differet ratings like 155, 190 , 255lph

The 190lph pump and the mallory regulator is less than $200 to your door.
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #10
Noise is not a problem.

So are you saying its not mandatory to have a return?

I plan on just T'ing off after the regulatorto the nitrous solenoid and carb do you think i will be ok since this setup according to summit and you guys here only needs 6.5 PSI?

Its been a few years since i had the tank down and when i pulled the electric in tank pump out i put back in a mechanical pick up and i dont think there was a return line on it.How if i even have to would i go about adding a return line?The mechanical intank pickup i used was from a 1980 mustang and like i said i dont remember a return line there was one hard line on the top and i used some rubber fuel line to go from the pick up to the filter and from the filter the EFI line and from the efi line to the pump on the motor.

Is putting in a return line as easy as just drilling and tapping a line on the pickups plate?Or is that not the way you do it?

This is confusing im getting mixed feelings about what i should use as far as return lines if i even should?

The guy at summit said that with the low psi of 6.5 that i should be ok and should have anything to worry about as far as bubbles or anything since the engine will be feeding off the pump as well.Not sure though im confused.
 

·
Registered
Joined
·
2,844 Posts
On 2004-07-09 01:48, TheGmKiller331 wrote:
Noise is not a problem.

Then the holley blue is for you


You will have problems if you try to push that 6.5psi gas through your current rubber connections and small EFI lines/filter. EFI lines and filters are small and made for high pressure "40+lbs"

Since you already installed a new pickup in the tank "what size?" I'd recommend a 1/2" pickup, just run some 1/2" earls rubber fuel line to a non-efi 100gph type fuel filter, then to the blue pump, then to your holley regulator. That mallory filter I listed in the other post would be perfect.

No you dont need a return line with the holley blue, but return lines make your pumps last longer. Have fun.
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #12
Thank you sir!


Thats what i needed to know.

So if i run 1/2 hose from the tank to the motor will that be sufficient?

The pick up is just a stock one for a 1980 stang so what ever that would be.

I just planned to run a new line from the filter to the front you think that will flow enough?

Also can i mount this pump in the engine bay or should i put in the rear near the tank?

Also if it is in the rear of the car near the tank how critical is it that the pump be lower than the tank or how ever that works?

I was going to just find a nice spot out of the way and mount it there see any problems with that?
 

·
Registered
Joined
·
2,844 Posts
On 2004-07-09 03:11, TheGmKiller331 wrote:

The pick up is just a stock one for a 1980 stang so what ever that would be.

I just planned to run a new line from the filter to the front you think that will flow enough?

Also can i mount this pump in the engine bay or should i put in the rear near the tank?

how critical is it that the pump be lower than the tank or how ever that works?
NO, you need a bigger pickup

NO, you need a better filter and bigger line

No, put it in the rear next to the gas tank.

Keep the pump as close as possible so the line stays short which will = less restriction. Remember that every little restriction adds up....even 8ft of 1/2". Your pump is rated at 110gph, so by the time it reaches the motor through your pickup/filter/line/regulator/T-fitting etc its only around 70gph. That why its important to use a high flow non-efi filter and the correct size line/pickup and connections or you will be crying later while your sitting on the bus.

IT'S CHEAPER TO DO IT RIGHT THE FIRST TIME, I really dont like the idea of using the blue pump...and I'm sure alot of others on this board feel the same way. Yes you can hot rod around town with it and it will work, but when your out WOT on a open road and spraying the juice...I really dont think that pump will keep her wet with the kind of cheap asS installation your trying to put together.

Sorry, thats just me 2cents.
 

·
Registered
Joined
·
9,251 Posts
<above> That's my setup with a Mallory 140GPH and a return regulator - works very well, absolutely no fuel delivery problems. Plenty of reserve. I run #8 up and back with a big Fram fuel filter right at the tank and the pump 2" after the big filter.

When I ran a stock tank, I used a 90 degree #10 blukhead fitting in the bottom of the tank sump, then punched a hole near the upper edge of the tank and glued a #8 fitting to it for return. I never knew how much fuel was in the tank - the Mallory pump pulled so good that it pulled the tank float down to the bottom.


Remember to check how the pump is rated. Note that the 110 is FREE FLOW. You will not have FREE FLOW in your system, so it will flow a lot less. Around 80ish. With a dead head regulator, the blues like to beat themselves to death. I had one - never buy another. Also - a dead head regulator has to react to system demand. If it's late, you're lean. In the system detailed above, the carb/etc, has first dibs on the full output of the pump with minimal restrictions. The reg just sends any fuel not needed to maintain pressure at the carb back to the tank.

If you're only using it to feed the No2, it'll probably be fine. But if you get the fuel system set up right now, you won't have to jack with it again.
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #16
Ok so now what the hell do i do about the pick up?

I looked through summit and they dont sell pick ups.

Whats involved with making one?

Or where can i buy one?

This is turning into one hell of a project and its gettin costly.But i want to do it right and make it reliable.

Can i simply modify the stock one i have now?If so how?
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #17
Ok after looking at your page 392 and reading this article http://www.centuryperformance.com/fuel.asp im now more confused than ever!

Can someone in detail explain to me what i should or need to do to make this work correctly and reliably?Im extremely confused and do not want to make any wrong (COSTLY) mistakes when doing this.

That article has confused me more than ever.

Will i need a return line for a mechanical pump?Or would a dead head regulator be better for a mechanical setup.

Most importantly though how can i modify this pick up or where can i get a bigger one?Is it as simple as plugging the existing feed line and drilling a new one out and putting in a bigger line?If so how do i attatch it to the locking ring?

This is a whole new area of "HOT RODDING" for me so please be as graphic and detailed as possible.
 

·
Registered
Joined
·
1,284 Posts
Discussion Starter #18
Guys?

Some one please help me!

I have no clue how to modify the pick up.

A friend at work said to use copper tubing and cut it to fit and use a 90 degree elbow to connect the hose to but im not sure of the space between the tank and body.If i do remember right there isnt much.

Please someone has to know how i can do this.
 
1 - 18 of 18 Posts
Top