blown 944

On my 87 there is an extra threaded hole on the master cylinder. My 86 doesn't have this and the PO of the 87 was using it for a datalogger sensor.

I'm pretty sure I can plug it but thought I'd check.

if so what is the thread??

blown 944

Anyone??

Bump

333pg333

What was he data logging off there Sid? M/C pressure??
..Probably braking points on the track?

blown 944

You could ask.... it is Troppo's old setup.

I'm not sure,but probably pressure and braking points.

I just need to know what the extra port is for stock.

Does anyone have a pic of a late master cylinder (car with ABS)??

87944turbo

IIRC it's for ABS.

Nader Fotouhi

You can plug it with no issues.

boerge

NOS?

gt37vgt

Hydraulic handbrake input??
spot for rear lock out solenoid for burnouts ???

Logging brake pressure would be nice but it has to be mapped against an accelerometer and perhaps even other chassis data .
and good solid state pressure transducers are ultra expensive

333pg333

So for track datalogging what do they normally tap to give braking readouts? Perhaps they don't need actual pressure, but just when it's being activated?

blown 944

It had a pretty pricey pressure sensor tapped into this port.

Does anyone have an 87 or even just an ABS car that they can look at??

alxdgr8

I'll look at my car tomorrow...but I would place a bet with Ben and say it's for ABS.

blown 944

That's what I was thinking, but the main line goes to the ABS box and then splits up.

There doesn't seem to be another line or anything for it to go to?????

dizzyj

Bump for an old thread. I have this 3rd port on my mc (89 turbo w/abs). it has a bleeder nipple screwed in. wouldnt that allow air into the system?