yeah this pump is said to pump 14 psi but Im only getting 7.

Is it preset for 7???? what do i gotta do to open it up all the way. I gotta regulator for it.

 

If your running a Holley carb. all you need is 7 psi. If you need more pressure and you are not running a reg. you must have a clog in the feed line or to many sharp bends in the line. also you must make sure the pump is as close to the tank as possible and below the tank as much as possible because these pumps are better pushers then pullers. If you are running the reg. that usually comes with this pump it is preset at 7 psi but it is also adjustable and you can turn up the press. by loosening the lock nut and turning the set screw on top of the reg.

 

i forgot to add.

I am getting 7 psi, BUT.......I wanted to have the return operating. I have to completely shut off my return on the regulator to achieve 7psi. Its a Mallory regulator 3 port return style. I wanted to have the return open and tune it down to 7-8 psi. I've heard, not running a return on daily driven cars will stress out the fuel pump. Also, the gas will be steady, collecting heat from the exhaust system and engine compartment. What do you think?

 

new fuel line system...........no kinks in lines. ( double checked)


I was wondering if there was some springs inside the pump that you had to modify if you were running a return?????

 

I am running the same pump with a two port reg. and with the motor off and reg. wide open I get 14 psi easy. So I think you might have a clog in the fuel line or have it routed with to many sharp bends or possibly have a bad pump or maby if the pump has been used a little bit it may need the valve body in the bottom of the pump cleaned and could have a cloged inline filter. I don't think it will hurt these pumps to use them with out a return because they were designed for carbs. and most of these set ups don't have return lines. As for the fuel getting hot from the exaust and engine compartment I started using a duel circut tranny cooler so I could cool two diffrent fluids with the same cooler and in my case I am cooling the fuel as well as the trans. fluid just before it enters the carb and it has been working pretty good.

 

There is a spring in the pump right behind the big brass screw at bottom of pump. This spring controls how much pressure the pump will put out. Example......If you take out your spring and install one from a red pump the pump will only put out 7 psi and 67 gal per hour instead of 14 psi and 110 gal per hour.

 

hehe come to think about it........I cant even remember buying the pump. I've had it for bout 5 years and I think it might of even had been a hand-me-down. haha! I think it needs replacin.

So you use the little cooler. You stab that onto the radiator correct? Did you see some performance gain when u installed it? or is it just for more consistablity? or both?????

So if I delete my return........do you think my pump will hurt any, shorter life span? Are you running a return? I would like to eliminate that extra line. Is your car a trailor car? or street driven race car?

 

i see you got a stroker. thats what im runnin in my S-10. 383 with .60 over bored pistons. what kinda times you cuttin?

 

I am getting 7 psi, BUT.......I wanted to have the return operating. I have to completely shut off my return on the regulator to achieve 7psi.

Thats because the Holley Blue runs an internal bypass. You do not need a return line for this pump. Typically whats done is you deadhead the pump against the regulator. This is the exact setup I have on my Z/28, and it runs perfect on the street, track, wherever. No problems so far.

 

ok but is it normal to only have a max psi of 7? thats what i get with the return port capped.

 

As long as the pump is running it should be ok though you might want to take the bottom plate off and clean it up and make sure the rotor vanes are not wore out if so you can buy a rebuild kit . as for the cooler goes I don't know how much it helps because I only had a tired old 350 in the car before the stroker and did not run a fuel cooler. I do feel like I can run more advance in the timing with it. My car is a street driven car and is never tralerd as a matter of fact my family and I just got back from a rod run in it yesterday a 3 hr. round trip

 

Depends on what you have set your regulator for. Mine is set for 7.25 psi and holds it with no problem, and no return line. You need to remember there is a spring in the regulator which will not allow the fuel pressure to go much below 6 psi (if at all), so the pressure will only go up, not really down from about 6 psi. If you only have a max of 7psi no matter how much you crank down the regulator screw - and you are running the Holley Blue pump - then I'd say something might be not quite right with either your pump or your regulator. The Holley Red pump maxes out at 7 psi and requires no regulator, by comparison.

 

Im a go ahead and get another regulator. The one Im runnin right now is the Mallory 3 port return style. Maybe its not meant to be with the holley blue. Im a go with a 2 port returnless this time.
The way my car sits right now is from 6-7 psi with reg. opened all the way. I want a little more than that to be on the safe side. like 7-8.

 

When you say 'opened all the way' - do you mean with the adjustment screw cranked down, or loosened up?

BTW - the Holley Blue comes with its own regulator in the package.

 

all the way = max psi.
i have one of them little gauges built into the regulator so i can watch which way I'm going. It goes all the to 0 and screwin it the other direction all the way = only hits 6-7