Quote Originally Posted by Benson View Post
upgrading your final drive is too crazy for streets and pretty pointless....stick with your 4.7...with a 4.9 you'll be constantly changing gears, reving at 4.5k at 110km/hr and wasting more fuel....
Using a 4.928 final drive over stock item will deliver an effective gain of 3% in usable torque.
The 3% also translates into increased rpm at a given speed in gear.
Using the above mentioned 110km/hr example,
In reality the 110km/hr cruising rpm of a STD DC2-R with 205/50/15 tyres is 3790rpm
Using a 4.928 final drive, the same cruising speed with same tyre size is achieved at 3903rpm
The math says the increase is only 113rpm - total. (@ 110km/hr)

Crazy? or Common Sense?