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I have been running my R33 on 14 pound, just recently, when I accelerate it dips, loses its push at about 5000 revs and up, anyone know why this is occuring?

Could it possibly be your inlet pipe sucking closed ? No blockage on the filter/airbox ? ...I would be more than willing to bet its your inlet pipe sucking closed under the load.

Have you even tried to search?

Basic R33 GTS-t 101

1. You shouldnt be running 14psi, it will kill your turbo

2. If you dont have management, and have increased boost, the stock ECU will have a fit - get a tune.

3. Could be a dozen other things like AFM pipe, fuel pump, blocked filter and a dozen other things.

I suggest you read the Forced Induction guide (its a sticky), it covers all the basic knowledge questions, problems and fixes

Cheers.

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