BCIII Cams installed, flat spot at VTEC STG 1. Tune???

[Super-DA9]

Hey everyone.

Just got a set of Buddyclub Spec III+ Cams, ITR B18C valve springs and new valve seals installed in my DC2 Vti-R.

Car idles fine, drives smoothly and VTEC still works, you can REALLY hear it at 6000 holy sh*t.

However there is a flat spot at the point when VTEC stage 1 is meant to kick in, the revs climb, a bit slower, but there's a drop off of power until you get to like 5500-6000 and then BAM, big hit of power an very soon after stage 2 VTEC engages and the power continues. also there's not much of a sound change at 4400RPM which is when stage 1 engages and also where this flat spot seems to begin.

It's only REALLY noticeable when your accelerating reasonable hard.

the only other difference I've noticed is that the engine is a fair bit more "tappy" sounding now, but I assume that'd be because of the stiffer ITR dual springs.

I figured the flat spot could be one or both of a couple of things.

1: car needs tune and VTEC engagement points adjusted slightly to suit the cams, which are basically Jap Spec ITR cams with improved duration and lift.

2: Vti-R intake manifold not letting enough air through to suit the lift/duration/timing of the cams until the dual butterflies open up.

I read this on honda-acura.com in response to a flat spot on crower stg 2 cams:

"Here's the problem with having stock primary lobes and larger VTEC lobes. By increasing the lift/duration of the VTEC lobes, you change the RPM range at which they're effective.

With your stock cams, the VTEC switchover is about close to the point where the primary lobes run out of power and the VTEC lobes will make more power. If you just change the VTEC lobes and keep the stock primary lobes and switchover point, there'll be a flat spot in the powerband before the fat part of the VTEC lobes comes on."

I'm wondering if this is the case with my setup right now running stock tune.

Thinking that maybe a VAFC would do for the time being until later in the year when I get a hondata and drive to TODA? Any comments on the VAFC?

ANY and ALL input will be greatly appreciated.