TRD Fuel Pressure Regulator

[Ben]

Does anyone have any pics of a TRD FPR installed on a 3SGTE? I am looking for pics of the fuel line routing specifically. I notice that it has 2 "IN" ports. Do you just use 1 and plug the other?

[Sang]

Originally Posted by Ben

Does anyone have any pics of a TRD FPR installed on a 3SGTE? I am looking for pics of the fuel line routing specifically. I notice that it has 2 "IN" ports. Do you just use 1 and plug the other?

I've never seen a TRD FPR, but if it has three ports, you can either:

A) Feed the fuel from directly from the fuel filter. Then feed the FPR through one of the inlets from the rail. Plug the other end, then use the third port for your fuel return line

or

B) Feed the FPR directly from the filter to one of the ports. Then feed the rail from the other port of the FPR. Then use the last one as your drain line.

[Sang]

Is this the FPR in question?

[Oteck]

the 3rd port usually for the pressure gauge... also didn't rickyb posted a better fuel setup by reducing the amount of return line going back to the engine to prevent the fuel from warming up?

[Sang]

Originally Posted by Oteck

the 3rd port usually for the pressure gauge...

Most FPR's come tapped with a 1/8" NPT for a pressure gauge, as well as 3 (or more) inlet ports.

Originally Posted by Oteck

also didn't rickyb posted a better fuel setup by reducing the amount of return line going back to the engine to prevent the fuel from warming up?

It's to reduce the amount of fuel going through the rail, which heats up the fuel. Which is route B I posted in my original post. Doing it this way would use all three ports on the FPR, instead of blocking one off.

[Ben]

Originally Posted by Sang

Is this the FPR in question?

That's the one.

So is this how I should run the lines?

From the fuel filter to an "IN" port and block off the other "IN" port.
And the "OUT" port goes into the fuel rail where the stock FPR is? And the vacuum line just goes to the same port on the intake manifold as the stock FPR?

I thought the other "IN" port could be used for the gauge, but the gauge won't thread in it - I would need to buy and adapter to make it fit.

[Sang]

Originally Posted by Ben

So is this how I should run the lines?

From the fuel filter to an "IN" port and block off the other "IN" port.
And the "OUT" port goes into the fuel rail where the stock FPR is? And the vacuum line just goes to the same port on the intake manifold as the stock FPR?

No, if you route it this way, you don't have a means for the return line. So if you route it the way you wrote, then you'd have to use the proper earls metric -> AN adapter, then another AN -> AN reducer to get it to -4, then hook up a -4 line from that to the fuel return hardpipe by the coolant neck (or all the way to the firewall, whichever you prefer).

It would be better if you made a line from the fuel filter to the rail. Then from rail to FPR, then from FPR to hardline.

I thought the other "IN" port could be used for the gauge, but the gauge won't thread in it - I would need to buy and adapter to make it fit.

Correct. Depending on the gauge you are using (most use a 1/8" NPT), you'd need an AN -> NPT adapter.

[Ben]

Originally Posted by Sang

It would be better if you made a line from the fuel filter to the rail. Then from rail to FPR, then from FPR to hardline.

Would I have to modify the rail? I was looking all over for pics of an aftermarket set up and this is the best I can find: LoveHorsepower MR2 Turbo Regulator Kit Installation

I figured that the install/line routing would be the same for the TRD one? And fuel inlet would be from the filter and the return to the rail ?

[Sang]

Originally Posted by Ben

Would I have to modify the rail?

No.

Originally Posted by Ben

I figured that the install/line routing would be the same for the TRD one?

Yes, for the most part. However if the TRD isn't already tapped for a 1/8" NPT gauge and you plan to use one, then you'll need to use a NPT -> AN adapter in one of the ports instead of plugging it.

Originally Posted by Ben

And fuel inlet would be from the filter

Yes.

Originally Posted by Ben

and the return to the rail

The return line is going to go from the bottom port on the FPR to the hardline by the coolant neck.

[Jaicvc]

see.. this peeps...
this is one of the reason this site is a big help!!!!!!!!!!

[Ben]

Sorry Sang, this is something so basic that it is hard I drew this diagram and just looking at it is losing me. How would I feed the fuel rail?

[Oteck]

you put a T between the filter and fpr if your regulator doesn't have the port

[Sang]

[Ben]

Thanks Sang, I had this thing in my head where it had to go to the FPR before the fuel rail.

[Sang]

In my picture, it's diagrammed the way it came from the factory. You could have it go through the fpr first, but then you'll need a T fitting and another hose.

[Ben]

Originally Posted by Sang

In my picture, it's diagrammed the way it came from the factory. You could have it go through the fpr first, but then you'll need a T fitting and another hose.

I'm going with your diagram

[Ben]

One last question

If I were to route this the way RickyB does here, would the gauge be accurate if I mounted it where the plug on the fuel rail is?

[Ben]

Or does the gauge have to be in between the FPR and fuel rail to be accurate in RickyB's way above?

[Ben]

Would there be a problem in having the FPR on the right of the stock fuel rail and the plug on the left? Basically running the fuel backwards in the rail? Or is the stock rail chambered to flow in one direction?

I am going to route another board members FPR like RickyB's diagram.

[canadam]

Did you buy that from Eric, Ben?