Staring down the EFI rabbit hole again, /6 intake design, Which way around for the 964 plenums in a 914? Options

[Mark Henry]

One of the locals fell on some hard times, his plans changed and his 930 was sold, so he offered me a smoking deal on an EFI system.

SDS EM5-F /6 system with twin plug coil packs, Siemens 55lb injectors, cold start valve, crank trigger and /6 trigger mount, extra relay outputs (had meth injection), Beru plug wires X2, manuals, base maps, dizzy hole block off, Bosch one wire (Djet) head temp sender plus all the cabling, fuses, etc that are not included with an SDS system.
I already have a Wabro 300hp FI pump, a Djet fuel pressure regulator, 14point7 wideband O2 meter and an O2 bung in both headers.

This is not a discussion on which Aftermarket EFI system is better, etc but rather on plenum based intake design.
I'm not new. I've been playing with a SDS EM4-F /4 system since 2003-2004 that's now on my '67 bug T4 2600cc conversion, I know that ITB's are better for peak HP, but I'm after overall improvement, usable vacuum signal for MAP, drivability, fuel economy and etc.

FYI I have also asked this on the bird board here for some more info on the build.
This thread shows my /6 conversion a few years back and has all the engine specs here. Plus I've built my own motorcycle ITB's before here.

Please I only want to discuss a single TB plenum based intake for performance EFI.

[GregAmy]

Mark, what tuning software is used with SDS?

[Mark Henry]

Mark, what tuning software is used with SDS?

SDS ??? do you mean the software?

Propitiatory, I'm not sure what they call it, I only see version codes but isn't that the OS? One old chip I have says 4F ver VII, I believe I have a 4F ver XIV (V14) in my old EM4-F4 4cylinder system which you have to chip to upgrade the software.
This 6 cylinder EM5-F6 has a 5F ver 25 chip set, but with the mod I can download the updates, not sure on the newest version code till I download it.

Tuning software like tuner studio?
SDS dosen't need it, you could mess up my fuel and ignition maps and I'll have it started in less than 5 minutes, be driving down the road and have the tuning good enough in 10-15 minutes to go racing , fully tuned in say 20-40 minutes. ( Note I know how to quickly scroll, it may take 3X as long for a beginner. Also doesn't count for finger problems, for storage security I once set a fuel cut at 1000rpm, next spring I forgot that I did this and that was a week of head scratching. doh!)
I ran the SDS on my 1.8 stock engine and for 4 years and except for the initial tune I never once had the programmer on the engine. My first 3 T4 engines I sold as proven running long blocks.

I've been running SDS for 18 years, this will be my 5th personal engine plus I've sold and installed a few systems and I've never had a car on a dyno. I've never seen the need for dyno time.