TxGat
Automotive
- Sep 9, 2009
- 9
Hi. I'm building a 1967 Mustang with a 289, multiple mapping Edelbrock Pro Flo EFI, RPM Heads, full length headers with 2.5" exhaust, a 5 speed (2.95 1st to .59 5th gear), and a 9 " rearend with 3.25 gear. I'm trying to get as much mpg as I can and still have some fun performance with around 330 hp at the flywheel. It's going to be a daily driver convertible. I've been reading this forum for days now and think it's pretty cool. And I have a question for the forum relating to my project:
I know a build trick for a quick car is to lighten the rotating mass. It ramps up and down more quickly. For economy I don't want this do I? I want a stock crankshaft vs a lightened one to get more centrifical force so it will roll farther without ramping back down, correct? Past the flywheel is where the weight should be shed (driveshaft, wheels, etc.), but the rotating mass within the engine will benefit from the added weight for adding mpg by allowing the motor to not ramp down so quickly. Is this correct?
Thanks,
TxGat
I know a build trick for a quick car is to lighten the rotating mass. It ramps up and down more quickly. For economy I don't want this do I? I want a stock crankshaft vs a lightened one to get more centrifical force so it will roll farther without ramping back down, correct? Past the flywheel is where the weight should be shed (driveshaft, wheels, etc.), but the rotating mass within the engine will benefit from the added weight for adding mpg by allowing the motor to not ramp down so quickly. Is this correct?
Thanks,
TxGat