[Frog76]

Does anyone have any experiences they can share connecting to sensors in a 968 for a data logger (DL1)?



For example, the best place to find the rpm input, and brake pedal (ie on off). I have had a look around the ECU, but with all the tape around the wires and the large connector, it looks a bit daunting.



The other one is throttle position. Where is the best place in the car to connect to this ?



Thanks

Craig

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[unknown4u]

You can use from the 19 pins connector the pin with number 14 it is Pin 6 of the DME, Rev Counter,



and for the brake signal use the brakelight from the back or the signal from the pedalswitch.

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[vnarma]

I just did the RPM hookup this weekend. I took from the back of the gauge panel, Plug "B" - Green/Black Wire. Worked well. The oil pressure, etc., are also nearby, hence why I choose this location instead of the diag port. outside temperature is nearby as well. Still looking for a reasonable steering angle sensor to include.

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[Renn68]

Not so sure you can just tap in for oil pressure - I ended up putting in a seperate sender for my MXL as I wanted to retain the factory OilP gauge and idiot light. I ran a stainless line from the orig pressure sender position up to a tee block and remote mounted both senders



Also, putting a brake pressure sender in the brake line will give you far more useful data than on/off. Again I tee'd into the front circuit by the master cyl.



For throttle position, you can tap into the tps or its equiv pin on the ECU.



I'd started looking at string pots for steering angle as they looked a lot easier to mount than a rotary pot but didn't get much further than that.



For water temp, I used an M5 sender and drilled and tapped into the air bleed housing.



Vaino - what are you using OAT for?

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[vnarma]

[quote name='Renn68' post='38345' date='Jul 16 2007, 09:01 PM']Not so sure you can just tap in for oil pressure - I ended up putting in a seperate sender for my MXL as I wanted to retain the factory OilP gauge and idiot light. I ran a stainless line from the orig pressure sender position up to a tee block and remote mounted both senders



Also, putting a brake pressure sender in the brake line will give you far more useful data than on/off. Again I tee'd into the front circuit by the master cyl.



For throttle position, you can tap into the tps or its equiv pin on the ECU.



I'd started looking at string pots for steering angle as they looked a lot easier to mount than a rotary pot but didn't get much further than that.



For water temp, I used an M5 sender and drilled and tapped into the air bleed housing.



Vaino - what are you using OAT for?[/quote]



I'm usin the OAT out of laziness. I like to know what the running air temp was as a record of how the tires did and the how the car performed. When I take down the tire temps and pressures, I rarely note the air temp. It is also interesting to see how the car pulls in hot versus cool temps. Certainly not required, but as I was in there I thought, why not until I get a steering angle snesor installed.



On the TPS, I thought of that but doesn't only give like two positions? Full Open, and Fully closed? I guess I'll need to dig into the manual on the details. I've got an old TPS kicking around here somewhere.

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[Renn68]

968 TPS is a pot so it can give you a scaled 0-100% measure

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[Frog76]

Hi,



Many thanks for the responses. I took the rpm feed from the back of the instrument cluster, and the brake on/off from the pedal switch. All seems to work so far.



I cant find an easy place to get the TPS yet - renn68, could you give me a hint as to where to find it ?



As for brake switch versus brake pressure, I went for the easy option to start with, and I can get a feel for the resultant brake pressure by looking at the longitudinal g forces.



Thanks

Craig

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[vnarma]

[quote name='Frog76' post='38407' date='Jul 18 2007, 03:46 AM']Hi,



Many thanks for the responses. I took the rpm feed from the back of the instrument cluster, and the brake on/off from the pedal switch. All seems to work so far.



I cant find an easy place to get the TPS yet - renn68, could you give me a hint as to where to find it ?



As for brake switch versus brake pressure, I went for the easy option to start with, and I can get a feel for the resultant brake pressure by looking at the longitudinal g forces.



Thanks

Craig[/quote]

I'm interested too in where to hook into the TPS wiring within the cabin. Also, if you know offhand the values for the Data acquisitions system.

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[Renn68]

looks like pin53







Long_G is not going to tell you a whole lot about your braking beyound point of application/ release - but it is a start. You can see below, poor mainainance of brake pressure (top) while down-shifting with long_G (bottom) as a comparison.

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