I need to Install an adjustable fuel pressure regulator. I am looking at a inline one. can I just pull the spring out of the stock one to bypass it and hook the vacuum line from the stock one to the inline one? what is the best way to go about hooking it up.
Thanks Dana

 

You can make a block off plate and run a external 2.8 or 3.1 iirc 3.1 uses a tpi regulator

 

Actually looking at RockAuto a 3.1 and 2.8 as well as tpi uses same regulator diaphragm. So southbay tpi afpr if you have room or lower profile Holley afpr for tpi.

 

I Need to lower my fuel pressure so I can run larger injectors. I put a supercharger on and I put 19lbs injectors in to fix a bog but now I am getting a rich code, and am using to much gas. The guy at Southbay injectors said that the 19lbs injectors will flow less fuel at lower psi. I was wondering if I pull the spring out of the stock fuel pressure regulator and install one in line would that work?

 

The regulator starts out at 3 bar , might want to tune instead of a bandaid fix.

 

I don't want to tune. I should be able to run this without tunning. Many people added turbos and supercharges in the past without tunning. Besides I can't find any computers and harness that doesn't cost a arm and a leg. I did see the Megasquirt but that looks complex.

 

The stock 302 can be tuned

https://www.thirdgen.org/forums/diy-...uide-book.html

 

That might be a little over my head. Are there any one that can burn a chip for me, or a kit that will make it easier?

 

Batronix burner if you want to uv erase Or multiple burners available for the sst 27sf512 eeprom. Will want tuner pro rt or tuner cat to datalog and modify the binary.
might read the diy prom stickies .
having a wideband and datalog cable is a must to tune it through.

 

Thanks, I will look into that. Also Are you saying that I should have a wideband sensor and gauge to see what the fuel ratio is while I am tunning?

 

I am going to try the Holley adjustable fuel pressure regulator. It says it can adjust it down to 35psi.

 

How efficient and what does spray pattern look at such a low psi ?

 

With the lager injectors and the stock fuel pressure it is flowing too much fuel causing rich codes at cruising speeds. The larger injectors will flow less fuel at a lower fuel pressure, but with the FMU will boost it to the pressure I will need under boost. The guy from South Bay Fuel Injectors said that the 19lbs injectors are used on 4.0l Jeeps and they flow 19Lbs at 35psi but at the 46psi that chevy runs they flow more like 22lbs. I know that tunning this would be the way to go, but I have seen engines running Paxtons and Vortec superchargers that ran stock tunes and using FMUs.

 

So I bought a kit from BoostedNW and got a emulator. It runs Tunerpro software. Has anyone used this setup before? Is it easy to use?

 

Might ask them , but I don’t think it will work in your ecm without a socket booster.