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Originally Posted by Elmerz Glu
How much boost? Any supporting mods? 91 octane?
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Boost is 0.5bar or about 7.5psi. Only mod is an RPI GT exhaust system. A blend of 91/100 was in the tank for these runs.
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Why is the torque dropoff at redline so sharp?
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Just the nature of the engine, you can see the ECU adjust the vanos around 7500 (note slight dip in HP/TQ) to maintain the torque peak but it runs out of steam around 8K. Nonetheless, 90% of peak torque is available from 4-8K, which is nice.
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Is this with final tuning?
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Not yet, still making adjustments for all fuel octane ratings, 91, 93 and racegas. Will be doing a 1500 mile roadtrip this week to further test reliability. I'll post updates about this project as we get closer to finishing the final tune.