mmasse

I recently got a 997.1 Cup and will be taking it to the track for the first time this weekend

I was playing around with Motec dash trying to learn how to read the info and I have an issue with the Brake bias.

I remember when the seller showed me the brake bias info it showed a percentage, but now it seems to be showing psi instead

The reading is 1500 front and almost 1000 rear when pedal fully depressed. This looks similar to the 60/40 it show when the seller showed it to me, but why is not showing in percentage??
Could I have accidentally changed it?
.I would appreciate any guidance and if any one has an instructions Manila for the Motec it would be great
.thank you

JaxEddie

I'm working though similar questions for my 997.2 that I'm just starting to drive.

Here's a good post I found that might be of some help. https://rennlist.com/forums/porsche-...beginners.html

J. Kid

The post linked above should be required reading for any new cup owner without ABS. The warning about starting off with too much rear bias should be heeded. In a high speed downhill braking zone it can cause snap oversteer.

OP: Sounds like you have brake pressure sensors. I ran a year and a half without them and just had mine installed so I'm no expert but if you are seeing 1500psi front and 1000psi rear that seems to be a very extreme front bias. I didn't think the car was capable of such extremes with the correct master cylinder sizes.