How to add an external adjustable fuel pressure regulator to TBI easily
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Car: 1990 Camaro RS
Engine: L31
Transmission: 700R4
How to add an external adjustable fuel pressure regulator to TBI easily
I got a PM asking me how I did it so I thought I would start a thread showing how I did and share the knowledge.
You will need two of these:
Two of these:
Two of these:
A regulator, I used one that is just like this but in black off of ebay:
You will also need one return line hose from the junk yard, I have not found a source for these new at this moment.
Also required will be a tubing cutter, I used this one:
And a flaring tool, I used this one:
The bends I put in mine are honestly dependent on how you want to mount it, mine has a curve to it that makes it loop easier.
You need to trim most of the line off of the fuel line kit so you have the fitting and a short piece of tubing. Then you need to slip on the flare fitting and put a flare on the raw end. The brass adapter will thread into the regulator using some teflon tape then the flared end will be threaded into this. Do this for both inlet and outlet of the regulator.
Take the return hose mounted to the frame rail and thread it into the return side of the regulator, it will tighten up to the line on the return side of the regulator. The junkyard hose will thread to the inlet of the regulator and then to the fuel line coming from the throttle body.
I made a "L" bracket and mounted it to the subframe rail to one of the corner screws on the regulator to support it instead of just letting it dangle. I still need to get a return line hose from the junkyard to finish mine up properly, for now it is making due with fuel injection rated hose with clamps.
Here is what the end result looks like, it hides under the snorkel really well.
You will need two of these:
Two of these:
Eaton Weatherhead 202X5 Brass CA360 Inverted Flare Brass Fitting, Adapter, 1/8" NPT Male x 5/16" Tube OD: Amazon.com: Industrial & Scientific
Two of these:
Eaton Weatherhead 105X5 Steel Inverted Flare Brass Fitting, Nut, 5/16" Tube OD: Amazon.com: Industrial & Scientific
A regulator, I used one that is just like this but in black off of ebay:
You will also need one return line hose from the junk yard, I have not found a source for these new at this moment.
Also required will be a tubing cutter, I used this one:
And a flaring tool, I used this one:
The bends I put in mine are honestly dependent on how you want to mount it, mine has a curve to it that makes it loop easier.
You need to trim most of the line off of the fuel line kit so you have the fitting and a short piece of tubing. Then you need to slip on the flare fitting and put a flare on the raw end. The brass adapter will thread into the regulator using some teflon tape then the flared end will be threaded into this. Do this for both inlet and outlet of the regulator.
Take the return hose mounted to the frame rail and thread it into the return side of the regulator, it will tighten up to the line on the return side of the regulator. The junkyard hose will thread to the inlet of the regulator and then to the fuel line coming from the throttle body.
I made a "L" bracket and mounted it to the subframe rail to one of the corner screws on the regulator to support it instead of just letting it dangle. I still need to get a return line hose from the junkyard to finish mine up properly, for now it is making due with fuel injection rated hose with clamps.
Here is what the end result looks like, it hides under the snorkel really well.
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92camaroJoe
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08-13-2015 06:07 AM