S4NoRice

It seems like, they arenot using any pressure sensor, instead, they get some data from the ECU for the Boost measurement....

So my question is...
which wire on the ecu is output the boost of the turbo? and what kind of data is that? Serial? Digital? vary length of pulse? or analog?

Thanx alot

RKA

"OCT"

James R.

it's a voltage output transducer, you can find the wire colors by looking at the installation guide. They do not get the data from the engine control system that would be infinitely more complicated than necessary to get at just one parameter like boost.

Note that transducer does not output a VAC reading value...only boost.

Regards,

James R.

S4NoRice

So what exactly data are they getting? analog voltage output?

James R.

it's merely a voltage output from the sensor which is proportional to pressure. Looking at the circuitry on the O.CT board I would feel pretty safe saying that. It could be frequency out or duty cycle out or something like that which would require a conversion, but the simplest thing to implement is a proportional voltage output...it's just less noise immune than a frequency or pulse width / duty cycle technique. Your best bet...hook a wire to it and whip out the ol o-scope and see what you can see. My guess is linear pressure proportional voltage output which goes to an ADC in the ECU.

If someone has a close up picture of the O.CT circuit board so that I can see what components are there I can tell you with a much higher level of certainty.

Regards,

James R.

S4NoRice

What i am trying to do is to build a black box with LCD displays RPM and boost preasure... Also integrate a LED for shifting convenience....

All of that are calculated and operated by a basic stamp II...

Neutron

"O.CT"

RKA

I stand corrected!