250 HP Slant Six - No Turbo

Let's give HighwayHooligan his thread back. Most of the things that give good performance work contrary to good fuel economy. Some, such as reducing weight and a higher compression ratio improve fuel economy as well as performance.

Mopar Performance gives the receipe for a 12 second bracket car, but it requires getting the weight down to 2350 lbs, a compression ratio of 12:1, slicks, a 390 cfm 4 bbl, and a 4.10:1 rear axle among other things. On the flip side, to get good fuel mileage in the 36 mpg (hwy) Dart Lite they had 2.45:1 rear gears as well as aluminum doors, decklid, and hood.

My suggestion is to read up on the G/RG engines from Mopar and magazine articles, especially those that document improvements with empirical testing. Check the web remembering anyone of us with an axe to grind can grind it here. That's my 2¢ worth.