Upgrading 850 rear brakes

[FaKaWi]

Originally Posted by dasonS70T5

why would upgarding the rears be pointless? maybe on a standard car yes, im pushing 300bhp tho and would like to upgrade, if its not too expensive. So, il ask again, can anyone point me in the direction of the article about putting S60R rear calipers on my S70? Cheers
Dason.M

It's pointless because your rear brakes do so little, from memory less than 20% of the work. You have 302mm brakes on the front, which are standard fitment to many of the P1 cars, however all the P1 cars, irrespective of the size of their front brakes, use the same rear equipment. By trying to fit big rear brakes whilst retaining a standard sized front you will massively unbalance the cars braking, potentially making it dangerous. There is NO point in fitting larger rear brakes until you are running something along the lines of a 330mm brembo front upgrade.

If you're so concerned about your braking, you'd be better off spending £200 on a set of Carbotech pads for the fronts and changing the brake fluid to RBF600. These cars are capable of handling 300bhp on tracks such as the Ring with the standard 302mm setup, provided a decent pad & fluid is used.

EDIT: Damn, forgot to ask scr8pdo and Al if I was allowed to post this reply.

[alv70d1999]

now what was wrong with putting that in the first place??

[Simon J]

Originally Posted by scr8pdo

http://www.volvoforums.org.uk/showthread.php?t=74906

Is this any good mate?

Yes, I'd already linked to this article in post #5 above, the one immediately after Dason's initial query!

[dasonS70T5]

Originally Posted by Simon J

Yes, I'd already linked to this article in post #5 above, the one immediately after Dason's initial query!

sorry mate, must not have seen it with all the other crap there