I have a 1991 hatch with a B16A2 in it. from about900rpms tillEXACTLY 4000rpms, the car lags. once it hits 4 grand, it rips, and i mean its not a small difference but a really large one. I believe the vtec kicks in at 4000rpms but it shouldn't make THAT much of a difference should it? any ideas one getting more power in really low rpms?

Thanks a lot.

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1991 Civic DX Hatch B16a Swap:
- AEM CAI - DC Sport 4-1 Ceramic - Custom 2 1/4" Exhaust
- Dropzone Coilovers - Skunk2 Intake Manifold - Aftermarket Fuel Pressure Regulator