Project Nismo Turbo build

phunk

I believe the fuel pump control via the app will work even without having flashed the car. That really is the best way. Otherwise you have 2 options... prime the system over and over, or start the engine and then adjust pressure. Its ideal to have 2 people, since aftermarket regulators do not hold set pressure once the pump is off, and you could never get to the engine bay gauge in time while its priming to see after turning the ignition on.

What I usually do if I am alone.. starting with the adjustment screw backed out to the point that it is not making any contact, I will thread it in by finger until I feel it touch down, then I will give it maybe 3-4 full rotations to bring the pressure setting up. Then I will sit in the car and prime it several times (you have to wait with key-off until the ECU turns off which takes a few seconds before you key back on or it will not re-prime). You will know when you have purged the air from the system and started to build pressure because the sound from the pump will change pitch in a very obvious way.

Then I will prime it a couple more times then go look for system leaks and see if there is any residual pressure on the gauge to give me any indication of roughly where I am set (some of these billet regulators are slower than others to lose pressure with pump off, they seem to have individual personalities in that way). I might bring up the pressure a little more and do some more prime and leak tests... but 99% of the time a leak is a leak and you dont need to get the pressure any higher before you can find it.

Once I am positive I am leak free I will put the intake manifold back on and get everything ready to fire up. I have the adjustment nut off the regulator and my hex key ready to adjust it. I fire up the engine and walk right up to the regulator and 3-4 seconds later I have the pressure dialed in to where I want it, and I put the lock nut back on.

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Gray Goose

Thanks for the info C, just to make sure.... the bottom port of the regulator comes from the fuel pump, the side port on the regulator goes into the fuel rail, fuel rails connect in the front and the other fuel rail goes to the return....correct?

phunk

No that wont go over well. Its somewhat open for interpretation but the lengths of the hoses will only accommodate a few ways. But you do have the regulator connections setup in a non-functional manor. The side ports are pressure side, and the bottom port is the outlet.

To connect as we intend: The hose leaving the pump and then filter feeds the rear of the passenger side rail. The hose leaving the rear of the driver side rail feeds the input (side port) of regulator. The hose leaving the bottom of the regulator connects to the stock feed pipe, using this original feed pipe as the return line.

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Gray Goose

I was thinking the regulator had to be after the fuel rail. I hooked it up the wrong way interpreting the pics .