I was looking at the fuel lines in the engine bay and was thinking ... Why do they go all the way around and over the motor instead of just going straight behind the motor? I mean, wouldn't it heat up the gas causing a loss in hp? Do they do it because of easier production or something? And if it does heat up the gas, is there some kind of mod to reroute the fuel lines?

 

There's just as much, or more heat back at the firewall.

Just thinking out loud, with no real knowledge of what the GM designers were thinking -To get to the stock location, the metal lines are run toward the rocker panel, near the front of the driver's side door, keeping them away from an exploding clutch or pressure plate. From there, the plastic lines can be routed in a protected way through the front fender, behind the plastic fender liner and into the engine compartment. The corrugated cover protects them from direct engine heat. The big drawback of that routing is the plastic support "loop" on the side of the throttle linkage cover. When that loop dries out and breaks, it drops the lines on the hot exhaust manifold/AIR connection. There were reports of melted fuel lines and even a few fires when that has happened.

I run the braided SS fuel supply and return lines that I use up under the firewall, and into the back of the fuel rails. I've never had a problem with the fuel heating up in either location.

 

heres a very very good write up on it...
http://ls1tech.com/forums/showthread.php?t=702813

 

Hmmm, thanks for the info. Also thanks for the link ltbird, cool appearance mod.