Brake master cylinder sizes

[LAP1DOUG]

I tried running my 986S one time with ABS disabled, and found the same thing. From what I have found it seems that most manufacturers set up their cars with too much front brake bias, and let the ABS take care of it.

I thought about getting a brake proportioning "prop" valve to work on the front pressure supply line, but I never got around to trying it. You can buy them from Pegasus Racing, or probably lots of other places.

Please let us know if it works - I would love to get rid of the ABS.

[bam914]

I have thought about removing the whole ABS unit. But I am afraid it might really mess things up. Might try it though. It looks like the the front brake circuit has a prop valve on it already.

[Jittsl]

Originally Posted by bam914

I have thought about removing the whole ABS unit. But I am afraid it might really mess things up. Might try it though. It looks like the the front brake circuit has a prop valve on it already.

I have a friend with a Boxster S that he AXs that uses no ABS unit and has instead a manual proportioning valve. If you like I'll get the details of what he has done.

I know from experience you can't just turn off the ABS and expect the rest of the system to work halfway decently - it doesn't. The brakes in this circumstance have way to little rear brake bias.

[bam914]

That would be great if he doesn't mind sharing the info.

[LAP1DOUG]

Originally Posted by bam914

That would be great if he doesn't mind sharing the info.

I'll second that - please fill us in.