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i get the same power as you with 12psi... they are wicked and are more responsive than a high flow.

at 17psi you would make pretty good power i have to get my ecu tuned before i try more than 14psi. so i will let you know when ive done it. just make sure for $1900 you are getting all the oil and water lines, otherwise expect to pay another $450 for braided lines and fittings.

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