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I don't think anyone is reving a 2.4 to 9500 RPMs, the rod ratio and piston speeds are quite bad. Running a 2.4 at 8000RPMs is like running a 2.0 at over 9000RPMs. Marco supposedly runs his 2.4s out to 8500. You won't necessarily get more power from the 2.4 versus a 2.0. You have a have a turbo big enough that the 2.0 isn't taking full advantage of it in the first place. No can't make more horsepower than the turbo supports not matter how big the motor is. For example, if you stuck a T25 that flows around 245cfms on a V8 that flow 500cfm in NA form, the T25 isn't going to do anything.
And no the 150hp internals of the stock 2.4s will not do. You need to replace the rods and pistons. And put a 4G63 head on it.
The biggest gain is in spoolup. You can run a larger turbo and make more power without having to rev it to the moon. Spool a 60-1 like it's a 20G...
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