So i am getting ready to get my car together and i'm going over possible fuel setups. I came across the fuel surge tanks on the speed machine website. as far as i can tell, you feed the tank from the intank pump then feed the rails from an inline tank then dump back into the surge tank and fro the surge tank back into the main tank. are there any pros or cons to this setup??

 

anybody??

 

eliminates fuel starvation

I don't see why you can't return to the stock tank though?!?

cons...more things to break/fail.

 

Surge tanks are for a high-end track racing setup. The idea is if gas in the tank sloshes away from the pickup, the surge tank will have enough gas on reserve to make up for that short "dry spell" due to slosh. This situation can really only be seen with VERY sticky race tires on a road course, doing prolonged high-G turns.

If your car isn't going on a road course, I wouldn't worry about it. It's additional points of failure for the system.

Dale

 

Oh, the return is just supposed to go back to the main fuel tank. There's no need for it to go to the surge tank.

Think of the surge tank just like a capacitor in a car stereo system - it's just on the supply side, and can level out the "dips" caused by fuel starvation.

Dale

 

that answers so many questions, thanks everyone

 

Actually the surge tank should have a return line also. The reason behind this is to relieve any pressure that is trying to build inside the surge tank. So basically you have the pump in the tank feeding the surge tank, once the surge tank gets full, the excess fuel returns to the tank. The in-tank fuel pump can flow at a much greater rate at 0 psi, then it could at say 70psi or so. Also the in-tank pump has a lot less stress in this configuration. At the outlet of the surge tank you have another pump that feeds the fuel rails. Hopefully that made sense to everyone. Simplified....The fuel before and in the surge tank sees 0 pressure....the fuel after the tank is pressurized

As Dale stated above these setups are generally seen on track cars.

-Dan

 

...or old rotaries switching to EFI and keeping the stock fuel tank.

 

Here is a wiring diagram and info from rotaryextreme to help you:

http://www.rotaryextreme.com/fuel.html


If your capable, it's so much cheaper to make your own.

 

It's not really that much cheaper to make it yourself if you don't have welding equipment or metal working tools. Machine shop work is pretty expensive.

-Dan