FS: Surge tank custom
 

or trade for an inline pump

Confused on how you would run this in the rx8. Can you go into more details?

Stephen

From the tank to the surge tank. Surge tank to engine. Return to surge tank then to oem tank

Attachment 201095

You would need to convert to a return style system with an external regulator...and have an inline pump between the surge tank and the engine.....otherwise you will have the same pressure drop out when the in tank pump looses fuel

The way I have it. The fuel pump is inside the surge tank

That works :) Mine is setup like that too....

We spoke on the phone once. You gave me the idea to use the surge tank.

External regulator should be set at 58psi if I'm not mistaken?

I believe is 40 idle

Hey Dan where do you have the surge tank mounted. I want to relocate my tank from the trunk to under the car but I can't come up with a good idea

Regulator doesn't know what the rpm is... so it is the same at all speeds as long as the pump can keep up :)

Mine is in the trunk. . No way it would fit anywhere else

The problem I see with it being in the trunk is that the fuel pump inside the oem tank doesn't flow like it should. Instead I see air in the line going to the surge tank. I believe is because the s. tank is much higher than the oem

The trunk isn't higher than the fuel rail. .... the oem pump would be pumping at zero pressure. . So it shouldn't have any problem pumping up to the trunk. If the oem pump is sucking air you will get bubbles

Well thats what I see. Bubbles.

I had to put a clamp on the line going to the surge tank to create back pressure. Because it wouldn't siphon fuel from the other side.

How do you have the return line from the surge tank plumbed?

I have the return from the motor to the surge tank and from the surge tank to a fitting on top of the cap/top of the fuel assembly

Return the surge tank overflow to the siphon on the oem pump assembly. That way you should still get transfer from the other side

What about under the hood where the windshield washer fluid bottle used to be?

Personally I wouldn't put it there...too hot...and right above the manifold :(

Ahhh good point...If I said that in public I'd expect to be smacked for that! :banghead:

Good point Dan. But will the return from the surge tank have enough pressure to make the siphon work? I might relocate it to under the trunk where the exhaust tip used to be. I have single exhaust.

Maybe a restrictor or a reducer from the -6 line to a -3 fitting and a -3 hose to the outlet of the pump so it can create pressure to make the siphon work. What do you think