Am trying to replicate the performance of one autococker in another, and would like to get some engineering eyes on the problem.

For reference, I have an ID (2k-based) mini fighter that gets a true case per fill (68/4500) and good velocity with the IVG flush, and no volumizer.

Reg is sweetspotted, but no clue as to pressure.

Hearing so many others have issues with velocity without a volumizer, I started to think about airflow in the whole system.

I'm running an Orracle front block/VASA and, in comparison to the standard 2k versions, it's got a cavernous through port, probably double the cross sectional area of a standard 2k mini FB/VASA.

Am also running a Sidewinder with the largest extender on it, which by itself is a fairly substantial volumizer.

Again, I want to duplicate the performance of the 2k mini in a pre-2k full body, and so plan to use all the same parts and pressure settings (where possible/compatible).

Also plan to run a volumizer because ironically the pre-2k full body still has less volume than the 2k mini body.

This leaves the airflow issue. In the pre-2k body, the choke point is the inlet port. There's only one of it, and it's small, roughly .178" diameter. So probably half the inlet area of a standard 2k body.

Given that the inlet to the valve chamber is ~.250" diameter, would it be fair to say that the total inlet area to the body should be at least as great as that, to ensure good flow from reg to valve?

In short, is there any reason NOT to drill a second hole in the body, complete with matching hole in the VASA?

And if I should drill a second hole, would you recommend making it even bigger, or about the same size as the first?

Thanks very kindly!