Last week I took a road trip to Hervey Bay to see Bradley Smith at Turning Point and get the car tuned. Here is the car ready to go:

He's using a Dynapack 4000 dyno (the sticker lies), being a hub dyno it is very safe and the readouts are consistent:

A secondary knock sensor was fitted to the head for safety:

Before jumping in, Bradley went over my Adaptronic map to ensure the air correction and injector opening times (dead times) were correct. He also checked the fuel pressure and base timing.
First of all the fuel map was set up so open loop matched the closed loop lambda targets. The dyno made it possible to hit pretty much any load cell at any RPM. The car was then tuned for Mean Best Torque up to 4,000 RPM. Above this range seemed to be full throttle tuning first of all making sure the fuel lambda ranges were safe, then playing with timing. A slow ramp up rate of 250 rpm/sec was used to confirm that the engine would be free of knock under any conditions.
We had a few issues throughout the day:
- The wastegate wasn't preloaded enough and was causing intermittent spool issues, we were able to space it with some washers.
- The feed for the bleed valve for the turbo was on the same vac line as the MAP sensor for the ECU, so it was throwing the readings off. We added a fitting to the charge pipe near the turbo to hook the bleed valve up to.
- The turbo bypass valve was leaking, fortunately I had stiffer springs in the car to swap in.
I also had an oil consumption problem on the dyno, completely filling my 500ml catch can! Bradley said he wasn't able to leave much timing in when in boost, this could be related. I haven't had the car back on the dyno to confirm, but just this week Jason at Automotive Plus tested the PCV valve and it seemed to be leaking pretty drastically. We have since replaced the PCV valve and added a one-way valve from a brake booster line just in case.
The car is certainly lively to drive now!
Cheers