e55 amg underated factory figures?
The Best of Mercedes & AMG
I saw an add for K&N for a Charger and the stock rear wheel HP on the graph was 292 from a 425hp crank rated motor. That's almost 30% loss, or the engine just doesn't make the rated juice.




First, he E63 is not 200lbs lighter. Second, E63 has a slight advantage in top speed due to having 7-speeds rather than 5.
Third, the faster 0-60 time is due to the fact the 5.4K produces 516lb/ft low down and overwhelms the grip of the stock tires. One has to be gentle with the throttle initially. It's not to do with suspension or launch control.




First, he E63 is not 200lbs lighter. Second, E63 has a slight advantage in top speed due to having 7-speeds rather than 5.
Third, the faster 0-60 time is due to the fact the 5.4K produces 516lb/ft low down and overwhelms the grip of the stock tires. One has to be gentle with the throttle initially. It's not to do with suspension or launch control.
I will launch better like 4 sec to 60mph ?
However, the sizes above are not a match as the 295s you list would be taller. If you currently have 265/35R18s then you'll need to change to 295/30R18 or your car's stance will be like a dragster. 295/35R18 would be too big unless you were changing your front tires to match them.
-Rob
First, he E63 is not 200lbs lighter. Second, E63 has a slight advantage in top speed due to having 7-speeds rather than 5.
Third, the faster 0-60 time is due to the fact the 5.4K produces 516lb/ft low down and overwhelms the grip of the stock tires. One has to be gentle with the throttle initially. It's not to do with suspension or launch control.




However, the sizes above are not a match as the 295s you list would be taller. If you currently have 265/35R18s then you'll need to change to 295/30R18 or your car's stance will be like a dragster. 295/35R18 would be too big unless you were changing your front tires to match them.
-Rob
Basicaly, Front 245/40/18 Rear 295/30/18 I guess this will be the best for our car.
Actually the best diameter match if you are sticking with 245s up front (which I would) would be 245/40R18 fronts and 285/35R18 rears. That would give you enough extra width to notice an appreciable improvement in grip. It would also ensure there would be no rubbing/fitment issues.
Feel free to PM if you need any more details.
-Rob









