There is a reason why apexi had to upgrade the vafc.

do you know what tuning resolution means?
if you have only 8 rpm points to set your manifold pressure voltage on the vafc1, what happens?
Let's say you pick 1000, 3000, 4000, 5000, 6000, 6500, 7000, 8000 rpm as your tuning points, what happens in between those points?
According to apex, there vafc1 assumes that the manifold pressure voltage will be linear in between 2 rpm points.

What does this mean?:

Let's pick a random numbers for setting for the MAP voltage change on the vafc1.

5000 rpm - 4
6000 rpm - 8
So at 5500 rpm ( a point you did not set and cannot set on the vafc1) the setting is assumed to be - 6.

is -6 the best setting for you? what if it isn't? what if your torque dips at 5500 rpm and the af ratio reads 12:1 still?

You can't do anything about it.

You are stuck with the setting because you can't enter more than 8 rpm tuning points.

This continues up the ladder...a standalone has the best tuning resolution.

The only reason people think VAFC2 is MAINLY for K Series motors is because it allows you to adjust the intake cam degree of the I-VTEC system. It contains many upgrades that were beneficial for B and H series.

AF, if you saw a GSR head make 10hp more than a B16 head on the same motor, than that GSR head was NOT stock. I can guarentee that stock for stock, the b16 makes more power. While I dont have a dyno slip to post, nor am i going to go to the trouble to get one to prove you wrong- i have seen it in person, and i know it to be true.

The B16 head is essentially the SAME as a B18C5 ITR head. The only differences are the actual internals. The bare head is almost identical. Ever heard of a B16 head on a B18C1 block? Its called a poor mans type R, because the B16 head has smaller combustion chambers yeilding higher compression.