I have previously posted in another section in regards to my 385 stroker motor. I hooked up a fuel pressure gage to it and check the pressure with the key on. It read 80PSI. while motor running 100psi. After consulting with many people, it seems like that my return line might be pinched. NOW with that. Heres my question. The fuel lines that go into the Fuel pressure regulator, at the end of thel ines are the silver fitting that goes into the fuel pressure regulator. IS that chrome silver fitting suppose to be at a 90degree angle? It is possible when I yanked my intake off I still had the lines hooked up. Becuase all I was doing was a re-securing my oil sending unit plug due to a leak. When I pulled the intake off I remember kind of twisting it off to the side (driverside) So I just wanted your imput. Again. is the lines suppose to be sitting a a 90 degree angle.
Chris

 

Shoebox has a photo of the stock lines:

http://shbox.com/1/fp_reg.jpg

 

Thanks Fred.
looking at those photos I checked out mine and they look the same. There is no bend at all from in the two lines that connect into the end of the fuel lines. The part that connects intothe fuel lines is at a 90 degree angle. And that is what I was refering to. Just before the rubber hose part. Im going to swap out the FPR and see what happens. The Vacumm hose to the intake is hooked up right. What kinda of FPR do you recommend? I think I might as well swap out injectors too for some bigger ones. What size do you think?
Thanks
Chris

 

I can't remember what the stock fuel lines looked like, because mine were removed about 8 years ago. Something has to turn the corner from the fuel lines running down the side of the intake manifold to the hard lines pointing out in a perpendicular direction.

For a fuel pressure regulator, the stocker is fine. What size fuel pump are you running? If you want to get an adjustable FPR, just avoid the Aeromotive. Too many people have had problems with them.

For injector size, to get the minimum recommended injector size, multiply peak flywheel HP x 0.07

Example....

500 fwHP x 0.07 = 35 #/HR

Going slightly large won't hurt. The stock PCM will handle 42's with no problem. Just make sure the tuner knows the exact injectors you plan to use.

 

Well if you say the Stock FPR is fine. Then maybe Ill just run to pick a part or autozone and pick up another one. YOu hit what I was trying to say right on the head. The Perpendicular part of the fuel lines is what I was questioning to be at 90Degrees. After looking at it, it appears fine. I checked the lines from the intake to were it goes into the fender. It appears to be fine. Is there any where else I can check to see if the return line is pinched?
Chris

 

could be a bad gauge. my snap on one went out 2 weeks ago and was showing 75 psi at idle

 

Wow I didnt think about that. I should be a good gage. The gage is brand new. I got it from Autozone. It should be working. I tend to think it is becuase I pulled out one of my plugs and its black as hell. (LEAN) and before it would not idle at all. Ill check that out though. Ill get another gage to cross check it
Chris

 

UPdate Today:
If you have seen in my previous post My pressure was at 80psi. Now I pulle off the fuel return line at the fuel pressure regulator without having to disconnect the fuel lines. And in doing so (Return line) had a large amount of fuel inside the line. In fact when I placed it down a bunch pored out. Now I thought this line is suppose to route gas to the tank. Not stay in there like that. So is that normal? It seems as if something was blocking it or something. I dont no. I bought another fuel pressure regulator as well. Also. I can I tell visauly that a regulator is bad?
Thanks
Chris

 

One possible explanation....

When you shut off the fuel pump (key & engine off) the spring in the FPR closes down that end of the return line. Between that point (FPR) and the tank, there is nothing that is going to cause the return line to empty. It can't flow out of the return line unless air goes the other way to fill the void left by the fuel flowing out of the return line, all the way back to the FPR.

 

Cool that makes sense. Also when I pulled off the hold Regulator. I found debris in the screen. I for sure have a faulty gage. Theres a little black button on the side of the gage to clear it to make it go back to zero (this is with the gage NOT hooked up to shrader valve) It will not clear. IT stays at 40psi. And then when I hooked it up and turn the key on it reads 80 PSI. So I think I fixed that issue.

Now I have another issue. YEs this motor has CRITTERS LOL. I found a nice oil leak coming from the front of the motor. My first thought was front main seal. Well that wasn't it. After further inspection. I saw oil coming out from behind the opti spark. So looks like I gotta pull that hub off, water pump etc... to get to it and replace the seal. Im about this close in selling the motor for parts? Running out of patience.

 

I think I found the leak. Front main seal. Its really wet of oil after running it. I think it was splashing the oil up behind the opti and then dripping down,
Chris