Here is a copy of the dyno print out:
Sorry it's not any bigger but this site limits my pictures to 800x800 pixels and I had to keep re-sizing the image on photobucket.
The top blue line is torque, the red line is power and the pink line is boost.
To answer your question Clonebug; boost at 2500rpm is 3.5psi and at 3000rpm boost is at 10psi. Peak boost of 21psi is reached at 3400rpm. (not 3300rpm which I said earlier
)
Boost Control:
I'm running the CB adjustable wastegate. Spring tension can be adjusted by screwing a bolt in or out of the housing against the spring.
This is mounted on one of the exhaust primaries and has raised questions about the suitability of this position for accurate boost control.
I can confirm that boost creep
does occur with this setup. The way I got around this was by using my ECU to control the boost with a boost control solenoid. I unwound the bolt in the wastegate to make sure the sping tension was very low. This allows the wastegate to open as wide as possible and allow a maximum amount of exhaust gases to be bypassed.
When I used the wastegate directly, without electronic boost control I found that overboost occurred very quickly with the wastegate spring tensioned. With the tension released in the wastegate spring, overboost didn't occur until around 5000rpm but boost climbed very slowly and the effect of the turbo was compromised.
In summary, I would recommend trying to move the wastegate to the collector. Electronically controlling boost is a bit of a "band aid" but it works for me.
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