A few thoughts on power delivery with the S/C:
The stock vq37 starts coming in to it's power band between 2,500 and 3,000 rpm, Then holds a flat torque curve from 3,000-6,000 rpm before it starts falling off.
The VQ37 with the Stillen S/C acts like stock from 2,500-3,000, where the torque is rapidly increasing, but then continues that linear increase in torque all the way to 4,000 rpm before then engine is fully "on". Then the torque curve is flat from 4,000-7,000 rpm before it starts to fall off.
Overall, it's a very useable power band, being near peak torque for a 3,000 rpm range. The fat part is now a thousand rpm higher than N/A, but it's still making more power than the N/A engine everyhwere in the rev range.
Compared to a larger displacement N/A engine, the downside is lower torque from 3-4k rpm, but that's only if the N/A engine has variable valve timing. Otherwise, the larger N/A engine will suffer the same problem. Compared to a turbo engine, the downside is lower torque until the turbo spools up, which would occur, when... 500-700 rpm earlier than the supercharger?
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