Quote:
Originally Posted by Driver72
So if they keep that same weight gain for the M1 over the 135i that won't be too bad at all. But again, I'd think they'd be able to shave some weight in the wheels and tires (probably 7-10 lbs each). And with a CF roof too, it could be close.
No CF roof and you are probably right, it could be a 80-90 lbs weight gain.
But with only 45 hp more on this M1, you'd have to think BMW knows they can't add much weight at all to the M1, otherwise it's straight line speed won't be much greater than the 135i.
Where the weight is added will mean a lot too.
If they give it a CF roof and drop 40 lbs off the top, and go with lighter forged wheels and nonRFT tires and drop 7-10 lbs per corner rotational mass, adding some weight to the diff, and drivetrain, as well as suspension parts and so forth won't be too bad.
If they lose say 8 lbs per wheel/tire or 32 lbs total weight in rotational mass they could add 80 lbs in sprung mass in the diff, drivetrain, etc and it would all balance out anyway.
|
I don't think it's very likely the wheels and tires will be lighter, considering that they're getting larger and wider (by a considerable amount it seems). The factory specs don't generally allow them to cut down on strength to save weight like some of the aftermarket companies do. I'll be surprised if they're able to keep them the same weight, but I'm actually expecting they'll be a little heavier.
Also, the brakes are getting larger, and that adds weight pretty quickly. If the N55 is really 40lbs lighter than the N54, my guess is that combined with a few other lighter components will probably make this a "break even" when compared to the 135i.