Ive just got a shot of a copy of Durametric thanks to Stevo996 , so what readings do i need to log to check the map in my car.

I was thinking revs, maf, lambda 1+2, timing.

 

what are you wanting to datalog for?

my Mechanic likes to see these

RPM
Engine load Intake air temperature
Ignition angle
Oxygen sensing bank 1
Lambda setpoint, B1
Adaption, range 2 (FRA) bank 2
Boost pressure of sensor

 

We do:

rpm
engine load
oxygen sensing bank 1 or 2, lamda value- this is your AFRs...
ignition angle
boost of pressure sensor...
with these values we can fine tune your car...

 

Thanks alot
I realy just want to do a couple of logs to see how good the map in my car is , as the car was already tuned when i bought it. I know who di the map and they have a good rep but have personaly never used them before.

 

On the Durametric, what is "Boost Pressure of Sensor" is that Boost in hecto pasqual? If so does anyone know how to convert?

 

That's absolute pressure in millibar. Subtract 1000 for atmospheric pressure (assuming you're at sea level) and that will give you boost pressure.

 

I also log injection time, which can be converted to duty cycle by the following formula:

Duty cycle (%) = (Inj. time)*(RPM)/1200

This lets you know where you are with respect to the ability of the fueling system to keep up.

Jon

 

Wouldn't exhaust gas temperature also be usefull ?
what would be a reasonable temp. at full boost in 4th or 5th gear ?

 

The 996TT doesn't have true exhaust gas sensors... it approximates the info based on a complex model in the ECU. When you modify the exhaust, ECU tune or turbos, the EGT model becomes significantly less accurate.

 

I have an aftermarket EGT sensor and my exhaust gas temp. at full boost is between 980 and 1000 degrees celcius (650-700 at cruising),I thought it was much to high but I also have a Saturn Sky redline and they are also around 1000 degrees celcius so I asked a tuner if this wasn't to high and he told me it was normal ? What's your opinion?

 

The distance between your thermocouple and the exhaust port will affect the temperature reading.

 

Yup. In my experience, I think it should be between 14"-16" or so from the turbine housing.

 

Add throttle position sensor 1 to the list.

 

Yep. And it maxes out at 1.54 BAR.

 

Can I ask where do you installed the EGT sensor? In the exhaust manifold or after the turbo? The 1000°C are reached after how long time you're at WOT and what rpm range?

Thank you