Any mods possible to make an '04-'06 GTO more efficient?

[raysfan81]

I really love the way those cars look but with fuel prices on the rise again I'm not sure I want to pay so much at the pump. If I got one does anyone know of a way to get a diesel engine to fit or maybe run it on ethanol? Any ideas?

[Joenavy85]

save money on the engine swap and use it for gas. i understand wanting better mileage but coughing up a bunch of money for an engine swap into that wouldn't be worth it in my opinion. i would go with aero mods, maybe a warm air intake, and i'm sure they have an aftermarket rear-end with taller gears

[raysfan81]

I guess you're right but there are some Chevy diesels that could probably be dropped in place of a small block for pretty cheap. Another question, how do you get that fuel economy badge in your signature?

[Joenavy85]

if you go to the "Forum News & Feedback" forum there is a thread showing you how to do it

[Big Dave]

Read the aerodynamics forum. The GTO has room for improvement.

Swap in the 2.73 R&P set out of an automatic C6 Corvette.

[Joenavy85]

bumping from the 3.46 rear end to a 2.73 would be a big improvement. the 6L has plenty of torque as does the 5.7L

[zonker]

an underdrive pulley system will help fuel economy, as will getting a ecu tuner to remap the fuel and ignition curves.