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Originally Posted by E55 KEV
Hey Dave, since you are a brake man. Isn't that the oddest placement for a rear brake setup on the SRT-8?
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It looks to be in almost the same position as the rear brakes on the "normal" 300C. Perhaps it is clocked about 15 degrees CCW from the 300C's brakes. That doesn't seem very odd to me.
Are you really asking why the front calipers are trailing (meaning aft of the wheel centerline) whereas the rear calipers are leading (meaning forward of the wheel centerline)? That is an unusual combination. Most cars either have both calipers leading or both calipers trailing.
The location of the calipers is usually dictated by the configuration of suspension components. Ideally, the calipers would be at either the 3:00 or the 9:00 positions, since this minimizes the occurance of pad knockback due to wheel bearing deflection under heavy sideloads. In English, this means you can go through a series of hard S-turns at the track and then not have your brake pedal sink down further than normal next time you step on it. Sometimes the suspension design forces the brakes to be clocked into a less than ideal position.
If you locate the caliper near the top position, say at 12:00, then you better design the car with hefty wheel bearings or the thing will have nasty knockback problems. For example, the Subaru WRX STi and the Nissan 350Z Track Model both have significant knockback issues when you put sticky tires on them and drive them on a race track.
Here's some good background information on knockback:
http://www.stoptech.com/whitepapers/knockback.htm
That rear brake is no where centered near 3 or 9 O-Clock like most cars! That rear SRT-8 brake is center about 7 O-Clock.
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