Hi everyone,
Took my car in for a full re-tune on Friday 01/09/06 after installing a new batch of goodies... spent all day at it once again (literally) and came out a very happy man; yet not so happy (you know what I mean).
Tuner spent most of the day mapping the fuel maps and the ignition maps making sure they're all perfect and smooth - I kid you not; they're SMOOTH!!!
Came out of the room with 225.31rwkw @ 10psi - we had hit a boost "leak" problem.
EDIT: Dyno Graph Uploaded 060906
PROBLEM: With the EBC (cheapy hybrid one) set at 18psi; it built up boost quickly (1bar by 3,500rpm and full by 4,500rpm) but at 5,500rpm onwards it dropped/leaked back down to 10psi. This resulted in my lower than expected max power figure. Had the boost held 18psi all the way to 7,200rpm redline; we're certain we'd be up around the 250-265 area.
Anyways; what I'm wondering is what the cause of this is... there are a few theories:
1) The Boost Controller
2) The Wastegate Actuator (still stock)
Want to get the right answer so when I get sick of this 225rwkw feeling; I'll fix it up and get it tuned once more. Just want to know what the cause is so I can get the right parts to fix it up. At the moment the car is awesome; very smooth!
Big round of applause to the guys at BD4s for spending all day on it and getting it perfect to what it's capable of. Many thanks to Mitch and Trent from NBP for also taking the time to be there and work on the car when solving the problems.
Will post up a dyno graph tomorrow; left it at home~
Stan