stuka
any update Rob?
I would've had the car back a few weeks ago, but there seems to be an intermittent issue at high RPM (electrical interference and/or something else), and I haven't had time to diagnose or fix it yet. I chose to do all the electrical wiring work myself, so it's my responsibility and MRC can't finish the tune in the mean time. Note: we've already concluded that it's not spark breakdown.
MRC said that they have still seen it reach 294rwkw on 98 fuel with about 24psi of boost, but there is more tuning to be done because the aforementioned issue is preventing them from consistently doing dyno runs to the redline at full boost. My 290-300rwkw target has already been reached, but the final result will depend on the boost level that we settle on (I was intending to run no more than 23psi, but I'll wait and see how it goes).
*EDIT*
I visited MRC last week and fixed the electrical interference problem, but the high RPM issue was still there. Anyway, using the awesome built-in oscilloscope in my ECU's tuning software, I was able to diagnose what appears to be the actual problem. The teeth are only a few degrees wide on the RacerX 60-2 trigger wheel, and at high RPM after filtering is applied in the ECU the teeth appear to be so narrow that they (very intermittently) get miss-detected. My particular ECU actually does the crank sensor filtering in code rather than in hardware, so it may be fixable with a simple firmware update.
At this stage I think I might change my 60-2 trigger wheel for one with wider teeth. The issue is marginal/intermittent at the moment, so the teeth only need to be slightly wider to fix the problem.