I know this post is old but when my z was stock it did feel like the motor hated being revved pass 5k
But then I added the supercharger and it sounded like a total different animal up top it sounded much more refined pass 5k
Now that I have the turbo on it that I hate revving pass 5k sound is back
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370z vsr motorsports single turbo/built motor 9.1cr 525rwhp/450rwtq @ 10.5psi (stock maf maxed out)
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