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Originally Posted by sp00ln
Thanks for the offer, but I already have a decent electronic boost controller.
What kind of sensor does the car have to measure pressure in the exhaust system?
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A pressure sensor.
No really, the car uses both Mass Airflow and Manifold Absolute Pressure sensors to determine the load/pressure on the car. I assume the MAP sensor works fine as input for the ECU to allow it to properly control the turbo's wastegate.
Also, I figured out the leak. The flex joint on my up-pipe has a hole in it:
While I was under there, I also noticed that my timing belt cover didn't quite like the heat from my headers:
I ordered a Bosal uppipe, since it's got the heatshields on it... hopefully it's not a total piece of junk. And depending on how hard the timing cover replacement job is, I'm either gonna hit up Lithia for a new one and do the install myself, or haul the car back down to Gruppe-S for a repair.
Now the question is, what caused the up-pipe flex joint to fail? Was it debris? I've got a skid plate I was hoping to use to protect the underside of the car, but I think it was the skid plate reflecting all the heat from the headers that melted the timing cover. At least taking the skid plate off was good for lowering my EGT's by 200F... so it's certainly having a major effect on the under-hood temps. I wonder if there's a way to use the skid plate with some ventilation to keep things cool... 'course if the problem is radiant heat, no amount of ventilation is really going to make a big difference.
