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Well I made a comment on another post saying I came up with a fix for the psm failure issue when running the 997 gt3 brake master cylinder. Well I have got a few messages so I will share here.
The theory was that when going to the gt3 master, the larger piston would produce to much flow and trigger a pressure switch inside the psm pump and cause it to trigger a psm and abs failure. This failure would happen for some constant and others intermittent. It would happen less if running the larger 997tt/gr3 rear caliper with larger pistons but would still happen.
So my ideas was to just slightly reduce the pressure and it would fix the problem. We created a test unit and put it on Dan kinzie's car. Dan has run it for over a month as well as 2 full track days and I can confirm it fixed the psm issue.
We setup a jegs brake proportioning valve inline and maxed the pressure on the valve, then backed of just a tiny bit. Only takes about a 5% or less reduction to not trigger the psm failure.
This is something that you can do yourself if you have brake line flaring and bender tools I will be making up a few kits for guys that want to go to a gt3 master but not have the resources to make the lines.
It's simple but works. Any more question, feel free to ask.
Hello Flewis763
Did you made some of the kits that you talked about in the above post ?
Yes, it was last year.. Just hoping that this is a possible solution.
If yes, let me know, thanks a lot
04-10-2019, 11:35 PM
997 gt3 brake master psm fix
