What is the best performance upgrades/dollar?
07-21-2010, 10:17 PM
#52
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Well, that's not quite how the bias valve works, but the effect description is close enough.
The Porsche brake bias valve regulates at what pressure in Barr the rear brakes receive less pressure than the front brakes. When you first start applying the brakes both the front and rear receive the same pressure. As braking increases the bias valve tapers off the pressure going to the rear brakes. They come in 5/18, 5/33, 5/45, 5/55, and 5/65, 5/18 is stock on a 928. The higher the second number the higher the braking pressure before the pressure to the rear brakes does not increase as quickly as the pressure going to the front brakes.
The Porsche brake bias valve regulates at what pressure in Barr the rear brakes receive less pressure than the front brakes. When you first start applying the brakes both the front and rear receive the same pressure. As braking increases the bias valve tapers off the pressure going to the rear brakes. They come in 5/18, 5/33, 5/45, 5/55, and 5/65, 5/18 is stock on a 928. The higher the second number the higher the braking pressure before the pressure to the rear brakes does not increase as quickly as the pressure going to the front brakes.
07-22-2010, 06:01 AM
#53
Racer
The best bang for the bucks is to lower the weight of the car. You can remove all the carpet by exemple...
etc
I Know, it is something "extreme", but it can cost 0 and enhance performance.
Puyi
etc
I Know, it is something "extreme", but it can cost 0 and enhance performance.
Puyi
07-22-2010, 01:14 PM
#54
Nordschleife Master
07-22-2010, 02:56 PM
#55
Rennlist Member
07-22-2010, 06:25 PM
#57
Rennlist Member
Depends on your driving. If on the street only then stick with the stock 18. If you want a little more rear braking go to the 33. If you still aren't getting any rear brake lock-up then bump it up to the 55. The bias valves are not that expensive.
