Grand Touring Member
Join Date: Oct 2004
Location: Sydney, Australia
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What kind of mods are you currently, and planning, to run? I have yet to see a streetable NA or lightly boosted car require a fuel system upgrade.
The reason why you'd want to switch to a return system is if you're planning on running a lot of boost. With a non-return system, your pump has to supply just more than enough fuel so you don't lean out, or overpressurise the fuel rail. Since on a non-return system the ECU sends a signal to the fuel pump directing it to flow a certain amount (based on the air that's going into the engine), when you start upgrading your fuel system you need to make sure the signal is either modified, or your pump is set up, to keep the mixtures correct.
With a return system, you can just tell the fuel pump to go nuts and run its rate independent of engine load. Anything the injectors can't use doesn't build up in the rails, it just gets returned. A lot easier.
"I swear, officer, its all factory options!"
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Understeer is when you hit the tree with the front wheel.
Oversteer is when you hit it with the back.
Horsepower is how hard you hit the tree...
Torque is how far you drag it...