If you're dead set on keeping your k20a3 instead of swapping it out for something with far greater potential like the k20 or k20a2, consider finding some stock k20a2 camshafts and getting those installed. The A3 only has 2 cam lobe profiles and on the inlet side only. The A2 runs 3 profiles per pair of inlet valves. They're also on both the exhaust and inlet sides which is far better. VTEC engagement on an A3 is around 2kish rpm.

This mod is a bit complicated and may end up becoming more costly than people would think. Here's a link to someone who has done it.

http://www.k20a.org/forum/showthread...ghlight=199whp