NovaKid

I'm installing a stock 2003 LS6 motor and I'm definitely on the fence on whether I should run full length fuel lines or just use the corvette style filter regulator mounted near the gas tank to prevent running a full length return line.

I know the fuel will stay cooler with full length return lines, but is it worth it? I was planning on putting a cam, throttle body, etc on it in the distant future, but for now, it will stay stock with the exception of headers.

I have a return line that is capped on my fuel tank, but I still have the single inlet fuel rail on my intake. It has crossed my mind as to why the factory stopped the dual fuel line installation on the newer motors.

What would you recommend and why? Thanks for any help!!

PLEASE VOTE FOR YOUR CHOICE ABOVE THE POST

Lonnies Performance

iTrader: (16)

For best pressure control, you should always run a front mount regulator & return line.

For low power or stock applications, the factory style is fine, but once around 600+rwhp, the front regulator/return line will show better pressure control & once above 700rwhp, I feel the return style is the only way it should be done.

You should always control the pressure where it matters... at the engine.
The filter only controls pressure at the filter & cannot compensate for line restriction, boost or any other obstruction in front of the filter.

NovaKid

Thanks for your input! I'll snoop around your website too.

Lonnies Performance

iTrader: (16)

Just to clarify, there is still a return line on the newer Vettes (up to mid 03), but it comes from the filter/regulator instead of returning from the fuel rail.

The late 03 & up cars have the regulator inside the tank.

With the vette filter/reg, you will still need a return line back to the tank.