1985-1998 [Subscribe to Daily Digest] |
[Main 9000 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Re: front brakes on rear - thought experiment Posted by Larry West [Email] (#1140) [Profile/Gallery] (more from Larry West) on Mon, 25 Jul 2011 12:36:57 In Reply to: front brakes on rear - thought experiment, Ben, Mon, 25 Jul 2011 11:45:27 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Assuming a non-ABS car, first, the calipers are anything but a bolt-up. The rear, non-ventilated rotors are a lot thinner than the front, ventilated, rotors, so, at the least, you'd need to shim the pads to meet the face of the rotors. There isn't enough range on the front calipers to make up the distance. Add to that the diameter of the front & rear rotors is different as well, so the pads wouldn't line up properly.
The bigger problem will be that your brake bias will be all off. Calipers are sized differently according to their expected load, and the load on the rear end of a FWD car isn't a lot. So, the caliper's piston is sized to be smaller in area than the fronts. Less area to push on, less pressure is applied to the pads. Put the larger caliper with the larger piston back there, and you'll be soon locking up the rears all the time. You could probably get by with a device that alters the front/rear bias (as used in racing cars), but you'd need two of those, as the non-ABS 9000 uses a split-diagonal system where the RF and LR are on one circuit, and the LF and RR are on the other.
ABS cars, no matter the system, wold give you other fits adjusting the bias to work properly...
_______________________________________ Current: 2002 9-5 Aero Kombi Cosmic Blue 2000 9-5 SE sedan, Imola Red 1990 900S Rose Quartz, Auto Past: 1999 9-5 LPT Combi 1999 9-5 LPT sedan 2002 9-5 Arc 1990 900 5-speed 1986 900 turbo Convertible 1991 9000 turbo 1980 99 GLi 1986 900 turbo 1986 900 S 1991 900 turbo 1984 900 turbo 1976 99 GL
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.