240sx S14 fuel pump upgrade
 

What’s up guys!

I’m swapping a 2jz single turbo into my S14.

My question regards to the fuel system. I have an aeromotive fuel pressure regulator and I’m running -8 feed and -6 return line and I’ll also run e85. I’m using the walbro 450 fuel pump. I already know how I’m running the feed line but question is in regards to the return line into and through the top hat.

I assume I’m better off removing the charcoal canister and plugging the line into the top hat for the canister. But how do I go through the top hat with the return line? Can I just connect it to the existing connector? (Which is only slightly smaller but the holes on the other side of the top hat are crazy small) or do I drill through it use a bulkhead and just let it dump into the tank?

I’m going to add some pictures as soon as I get home tonight.

No responses!?!? I've had the same questions as I'll be running -8 for feed and return. I've tried to search for photos of 240's that have gone this route but have not seen anything.. and I believe the only aftermarket option is PHR which is $450-$500 if I remember correctly.

I would suggest look at other peoples setups to see what they have...the size difference is prone to leak, but if you can get a good seal on doing your own line it should work great!

Hey so I think I figured it out. Using the stock top hat I'm going to cut off the inlet and outlet feed and drill them to the proper size. The pump is 5/16" so I'm going to attach a hose from the pump to a 5/16" hose barb to -8 an bulkhead I found on summit racing.
The return line I'm going to do a similar setup. A -6 an bulkhead to a 5/16" hose barb into the tank and ill attach an aluminum line into the tank that way the fuel going back into the tank doesn't hit with such pressure.

Unfortunately, I already ordered the bulkhead from driftmotion and nobody sells a regular 5/16" hose barb to -8an so I'll need extra fittings :facepalm:

I have a YouTube and once I receive the order I'll be installing it so make sure you check it out.
The YouTube is "All Cars Everything"

here is the video i made on this..

https://youtu.be/0yf1SDk6OGk

The fuel return for S14 fuel tank is supposed to pull fuel from one side of the fuel tank to the area where the fuel sock is, because I guess fuel can't get there on it's own if the level drops low enough.

Doesn't look like you retained that functionality so I am curious how low your fuel tank can run before it runs out of fuel at the sock

Yea i removed the venturi system. I couldnt figure out how to keep it since the fuel pump would overwhelm the small holes the venturi system creates. I wil be able to go down to 1/4 tank before I get fuel cut off. For now that will work till i get a fuel cell.

The s14 tanks are known to crack anyway and they are crazy expensive to get another one so fuel cell is the way to go