skizzle84

searched, but found no directions. Whats the easiest way to hook up my fuel pump and fuel pump(or pressure?) regulator? And whats the pressure for a stock 84 12a nikki carb?

Alex-7

I think (think) nikkis need like 3-4 psi. not really shure, never had one.

Instalation is as simple as replacing your old pump with your new one. and splicing the regulator into the fuel line near the carb.

inuissus_cendi

what he said, and you'll want to mount the fuel pressure regulator in the engine bay, because it should be really close to the carb. You're probably going to want to get a pressure gauge in there too, mounted in the fuel line right after the regulator.

darkfrost

iTrader: (1)

I thought Nikki's dialed in really low around 2-2.5 psi?

Alex-7

^^^Could be.

skizzle84

I wouldn't need a gauge, because it says my pressure going in the carb from my fpr, right?

aussiesmg

iTrader: (1)

The gauge gives you the ability to us the regulators adjustability to increase your pressure/volume as you modify the engine

skizzle84

But in my case, which is keeping it stock except maybe a cat replacement wth the bonez and a RB catback, I won't need a gauge will I?

trochoid

iTrader: (6)

If you are replacing the fuel pump with an oem one, you do not need an fpr. If you go after market, you will need one. Mount it to the fire wall and use one of the extra ports on the supply side for a fuel pressure gauge. If you are keeping the return style fuel system, plumb the fpr after the carb.

darkfrost

iTrader: (1)

And if you do look for a gauge, find a 0-5psi one, the 0-15 are worthless. And let me know if you find one, been looking everywhere with no luck.

Rx7Kidd

i know this is a little off topic but i got a weber 45 and got a holley blue fuel pump and regulator, question is were should i mount it? regulator near carb and fuel pump in normal spot??

Alex-7

Yes!

skizzle84

After the carb, how and where do i do that?

Alex-7

What do you mean after the carb? the carb is the end of the line.


If you are using a factory fuel pump you don't need a regulator or a guage. If you are using a aftermarket pump that has a higher psi, you need a regulator and a guage to tell what your regulator is set to.

What kind of pump are you using?

skizzle84

well today i drained my tank, replaced filter and pump, and it started up. i didnt use the regulator because i forgot and somehow it was fine.. its an aftermarkt carter, im thinking ill do the regulator tomorrow?

darkfrost

iTrader: (1)

^ Make sure its not a dial type regulator!

cdrad51

I don't know what keywords you used, but this subject has been covered many times before.

cdrad51

Paul Yaw used to sell them, don't know if he still does. yawpower.com.

cdrad51

Depending on the model, that Carter pump supplies 5-7 psi. Too much for the nikki. You need the regulator. And like Darkfrost said, don't use dial type FPR. Too restrictive at high rpms. Use Holley 0-4 psi regulator.

IanS

iTrader: (4)

Hey CDrad, you ugly ****! Long time no talk man. Yes, I have also heard that the holley 0-4 psi regulator is better for higher rpm fuel supply. They also cost the same price, if not cheaper than getting a dial type at an auto parts store. I got mine for ~27 bucks from Summit.com comared to the 35 I paid for the dial type one at O'Reilly's - which I replaced once already because the firt one blew up. NOT GOOD.

RE-TurboFB

I'm pretty sure that the nikki needs 4.5 PSI of fuel pressure. I was running a stock pump and when i put my regulater on it i got way better idle and throttle response..

cdrad51

Yeah, happy new year to you too!

cdrad51

somehow I didn't get that.