[DFWX]

I have read much of supercharged 928s. A neat set up, but there are drawbacks to superchargers - though also for turbochargers as well. A supercharger is the easiest power up for a 928 and certainly for early ones with lower compression.
I agree with you that the VarioRam is the direction it would have gone. The intakes on 928s essentially are tuned tunnel rams and are one major reason for the excellent torque and horsepower/torque curve. Porsche work on the 911 had lead them to have to find out to max out power from a relatively small, air cooled (loose clearance) motor beyond just hot cams and over caberation - leading to understandings of intake flow, "sonic wave" of intake etc - Development of the 928 is not devoid of earlier developmental work on the 911.

For a while, exotic customizing of 928s was not that rare. Such kits and interests increasingly vanish with time as the car does not have the value for the costs involved. How many body kits remain being offered? Two I can find and the "GREAT" ones are long off the shelf and no longer available.
1/2 turbo style superchargers and to a lesser extend top mounted positive displacement superchargers seem a not-that-rare selection, and have seen a double supercharger set up and twin turbo in photos.
The stroker kits are so ungodly expensive as to just not be realistic to the value or result.
I just aquired an 86 1/2 5 speed with dual disc clutch that was retro fitted by that owner with an early 4.5 for its lower compression and much lower costs when his 32 valve 5.0 bit the dust. He claimed this was his 4th turbocharged 928 project and the most successful - mainly due to adding a TEC-3 engine management system for ignition and the fuel injection. It has a single Garrett turbocharger that he custom plumbed with wastegate of course, a TEC-3 stand alone engine management system and TEC-3 discharge ignition replacing the distributor, and 42# injectors also controlled by the TEC-3. It also came with Porsche CUP wheels. Interior ragged out, needs paint...
It is EXTREMELY powerful in a muscle car sense, enormous pulling power and goes through 1st and 2nd nearly as fast as you can shift - and it has the long gears, not the early low ratios, so that means it is really building speed. It is an incredible car to drive. More accurately, it is the fastest car I have ever driven in my life, and I have had some fast cars. But it also is a muscle car - the only road competent, excellent cornering, extremely stable and great suspension and brakes V-8 muscle car I ever drove - or even knew ever existed.
However, that it is a 16 valve like all mine are bothered me. So I bought a running and supposedly just rebuilt 32 valve 5.0, and with it comes
a custom front end kit that appears to be an old "can't remember the name at the moment" - Gambella? maybe) kit for hideaway headlights, flaired front fenders and a slant nose front. I am hoping to add a "medium wide" set of Clockwork orange rear fenders and side skirts (less radical than the full Clockwork orange which, candidly, I do not care for) and possibly a latter model rear bumper covering, or maybe not. This donor car also has new carpeting and a redyed (black) and virtually pristine interior to go into the 86 1/2.
I am not a "Porsche" person in history. Had hotrods (427 chevy, 440 Mopar, 390 AMX and Boss 351, and such as TR6, Twin turbo Maserati, Alfa Romero GTV 2000. Never was much on the 911, mostly because I always saw them as outrageously prices for what a person got...
Buying a 928 was a think fast lark decision. A person was selling a 1984
automatic with an older full custom body kit, in my wife's favorite color (Corvette yellow - ugh), BBS wheels and clean interior - for $4,000. We both drove it, she wanted it. I was impressed, so bought myself a green '81 5 speed hardtop (not sunroof) with excellent maintenance history by Devek - paid $6,000 which was a bit over priced but in real terms not really as everything was done and redone through the suspension, chassis, motor etc...
Then a parts car, then this 86 1/2 turbo, and finally searching out a custom body kit and good 32 Valve - finding both in a $2,000 buy...
I figure, when done, I will have about $25K in the 86 1/2, counting the donor car and a professional paint job - possibly a bit less actually. It should make a real 500 horsepower (people awfully exaggerate) with real V-8 torque, a 0.31 co-efficient drag and a redline top speed right at 207 mph, with it also likely a high 10 second quarter et car.
I like the 928 because it is a highly stylized, high curb appeal, excellent cornering, thundering muscle car that is perfectly unique. It was only later I began exploring the history of this non-Porsche-like killer Porsche and what such ever existed at all. A curious and significant anomoly in the turmoil of the collision of EPA, DOT and giant corporate manufacturer wars.
And I like interesting or unique cars. Have the shell of a 1958 "Berkley" out back - ahead of its time. A fiberglass and aluminum composite 2 seater micro car powered by a 3 cylinder 2 stroke motor, looking like a tiny 1950s Covette, that weighed all of 600 pounds. Just like looking at it.

My frustation? 928 s, particularly early ones, have many electrical gremlins that disable them. Nearly all do. Merely stating "check fuses, relays and contacts" is of little help as there are "contacts" all over the 928 and in odd places. There is no central info source for solution, though essentially every 928 owner faces exactly the same gremlins.
Beyond all the other benefits, that is a reason I want a stand alone engine management system - that completely bypasses all the Porsche electronics completely in relation to motor operation - nice.
For those grelims - people frustrated that the windows won't go down, a/c won't turn on and the fuel pump won't pump - 928 s are being dismantled at an alarming rate and most 928 s are parked - though the basic 928 motor is good for hundreds of thousands of miles and 928 s do not rust. It is for lack of a horse, the kingdom is lost. For lack of
support to solve simple electrical and electronic problems - minutes to fix IF you know what the fix is - the remaining 928 series Porsche are being slaughtered and their resale valves falling through the floor at an alarming rate (why I am getting them so cheaply...)