Fuel line question

tlea
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Joined: Fri Aug 03, 2018 3:34 am

Fuel line question

Postby tlea » Tue Sep 04, 2018 6:31 am

Hi again. I am trying to figure out the fuel line configuration for the 20 V Does the return to the fuel tank come off of the intake? If so where is it located. I am assuming the inlet is the larger banjo fitting at the rear of the engine Also what psi do the systems like to run at?
Thanks in advance

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jdm86gtz
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Re: Fuel line question

Postby jdm86gtz » Wed Sep 05, 2018 2:48 pm

The fuel return is at the front of the engine from the fuel pressure regulator (FPR) there's a short hose about 3 inches long between the FPR and the steel pipework under the throttles. The fuel feed is at the back of the engine through a banjo fitting.
The manual states there should be 34-40 psi of fuel pressure without the vacuum reference hose connected.

tlea
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Re: Fuel line question

Postby tlea » Wed Sep 05, 2018 6:17 pm

So the regulator is after the fuel goes to intake? Can I use an aftermarket adjustable regulator?

jdm86gtz
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Re: Fuel line question

Postby jdm86gtz » Thu Sep 06, 2018 1:25 pm

You have an internal fuel rail in the inlet manifold and the fuel travels from the rear to the front and out through the regulator.
Tom's did a bolt on adjustable FPR but very rare these days, you may be able to convert the original regulator with a B&M kit or use an adapter and remote mount an AFPR.
But do you even need more fuel pressure?

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tlea
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Re: Fuel line question

Postby tlea » Fri Sep 07, 2018 8:25 am

No I don’t need more pressure but this is going in a non Toyota platform. I’m adopting the tank to an in-line filter and didn’t know how it would work with the 20 V regulator. So on the original 20 v set up the pump pushes full pressure from the tank and isn’t regulated till after it goes through the intake manifold?

jdm86gtz
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Re: Fuel line question

Postby jdm86gtz » Sat Sep 08, 2018 3:58 am

Yeah, high pressure fuel on 1 side of the regulator and low pressure on the other. The regulator sets the fuel pressure.
The return side has a rubber hose with a simple spring type clip on it.

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