K04 TURBO REPORT FROM NEUSPEED

[enganear]

I was watching my catalyst temp earlier today and it was routinely exceeding 820C. I am not sure how this relates to temperature in the exhaust turbine housing. The exhaust entering the catalyst should be cooler than the exhaust in the housing, but there is an exothermic reaction that occurs in the converter and I am not sure where the temperature is measured. If it was not such a pain in the ass, I would install a thermocouple in the housing as suggested. If I ever remove the turbo, I will definitely do this before re-installing.
-enganear

[Haltech]

Originally Posted by enganear I was watching my catalyst temp earlier today and it was routinely exceeding 820C. I am not sure how this relates to temperature in the exhaust turbine housing. The exhaust entering the catalyst should be cooler than the exhaust in the housing, but there is an exothermic reaction that occurs in the converter and I am not sure where the temperature is measured. If it was not such a pain in the ass, I would install a thermocouple in the housing as suggested. If I ever remove the turbo, I will definitely do this before re-installing. -enganear

i thought the purpose of the catalyst was to heat up the unburned fuel, so the temp in that system is going to be higher since its a ceramic material?

[enganear]

Originally Posted by Haltech i thought the purpose of the catalyst was to heat up the unburned fuel, so the temp in that system is going to be higher since its a ceramic material?

Yes, the converter is its own heat source and I would guess the sensor is somewhere near the center or end of the converter body. The temp at this point should be unrelated to the temp in the turbine housing. I was just surprised to see the temp so high under light loading.
-enganear

[Haltech]

Are you using the DH to measure this temp? If so, i would say that PID is off.

[enganear]

Originally Posted by Haltech Are you using the DH to measure this temp? If so, i would say that PID is off.

I was using my Auterra Dash Dyno. What are people seeing for catalyst temps with the DH?
-enganear

[Haltech]

Originally Posted by enganear I was using my Auterra Dash Dyno. What are people seeing for catalyst temps with the DH? -enganear

Oh yes, i forgot you had one of those. Temps vary, from 600s to 900's. But the second you shut the car down, let it sit for a second, than turn it back on, the temp was higher than when it was running.

[ptperformance]

Originally Posted by enganear Yes, the converter is its own heat source and I would guess the sensor is somewhere near the center or end of the converter body. The temp at this point should be unrelated to the temp in the turbine housing. I was just surprised to see the temp so high under light loading. -enganear

Coverter temp are high both before and after the converter. You will get readings that are higher 6 inches in front of the converter and 8 inches after. The pre inlet temps are elevated from radiant heat reflecting back up the pipe. I did a whole class on this crap and if you get under a car at idle with a good temp gun you can see what I am getting at.

You are also getting calculated temps, not actual temps. There is no temp sensor in our cats, its a guess at best.