75 280Z - Updating fuel feed & return lines in the engine bay

[Patcon]

Hopefully that does the trick

[darom]

I hope so too, I just ordered the same fuel rail from Protunerz. That chamfer for the o-ring will be the first thing I will be checking when I get the part.

[HusseinHolland]

On 11/17/2023 at 8:25 PM, Zed Head said:

The "dead" part of the deadhead is the non-moving fuel in the rail.  Dead flow.

If the fuel doesn't pass through the rail, in one end and out the other, then it's a deadhead system.

Apologies, I was looking at the return vs return-less aspect of that debate. I don't see any disadvantage to this setup, if that was why you were pointing it out, or because I wasn't getting the point?  The one link posted seemed more concerned with carbureted setups, which is a whole 'nother ballgame, IMO. I would expect it would be unwise to use a stock style diaphragm version FPR for such a setup though. 

Volvo used this setup from the early 90's until the early 2K adoption of in-tank PWM controlled units. Removes the need for additional fuel lines on the motor, and removes the potential heating of the regulator and fuel returning to the tank. I haven't had any heat soak issues since switching to the billet rail and composite injectors. Improved starts, however the starter crank speed has a variable in that equation...

Edited December 6, 2023 by HusseinHolland

[Zed Head]

I was just properly defining the words.  You can't have a good debate if people use the wrong words.

[HusseinHolland]

Swapped out the ProTunerZ rail today. Old one in foreground

Easy swap out. Injectors stay put. 2 -6 AN fittings and the 2 hold downs on the intake.

Countersunk the first one (hand cut, no chatter or burrs) ProTunerZ didn't want it back.

Oring seats properly now (in the old one)

Edited December 9, 2023 by HusseinHolland

[darom]

My protunerz fuel rail has the same shallow o-ring surface for the CSV line. @HusseinHolland what is the name of the drill bit you used on yours? It looks like a deburring bit (45 degree?). I am heading out to Home Depot, will look for one. Thanks!

[HusseinHolland]

8 hours ago, darom said:

My protunerz fuel rail has the same shallow o-ring surface for the CSV line. @HusseinHolland what is the name of the drill bit you used on yours? It looks like a deburring bit (45 degree?). I am heading out to Home Depot, will look for one. Thanks!

Sorry didn't see this earlier. It's a countersink bit,  I think they are typically 82º, so not aligned with the 37º JIC fittings, but it still works

[darom]

Thanks! I guess if the opening is 6 AN/ 0.34 in, I will need a 3/4 in countersink bit.