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your 991 turbo, what do you guys drive for the other road car, i have a 991TTS, love it, keeping it. i also have a PTT, like it but its just to big for me, was going to get another cayenne turbo but thats not what im looking for either. looking for a sports coupe/sedan thats quick and fun to drive, what do you folks drive
I might be going the other way. I'm contemplating replacing my S6 with a Panamera Turbo. The S6 is definitely quick and fun to drive, but can also cruise in comfort and return surprisingly good fuel economy. My S6 made 589 awhp/679 ftlbs on same day my 991.1 TTS (stage 3 at the time) made 581 awhp/613 ftlbs. PM me your VIN, mileage, etc. I've been focusing on 2014+ PTT, but I might be interested in your 2013 depending on the specs.
S6 pics and videos here if you have any interest: https://photos.app.goo.gl/ARzfVCdoee38iuzE7
That's very cool! More details, please. What have you done here?
That is an Autorotor Twin-Screw supercharger "kit" that was developed by 928 Specialists. (It's a 1.2, 1.4, or 1.6 liter unit. I don't remember. It's been 15 years so...) I came in at the beta #2 stage to document the installation of it on my '91 928 GT and to develop the fuel trim and spark advance maps for the 'chips' that would have shipped with the kit had it gone to production. I ended up helping to develop some additional bits to enable a better, safer, tune.
The kit dispenses with the '87-'95 928 dual-resonance intake manifold(*) and in it's place drops a 'plate-style' manifold above an intercooler with the Autorotor mounted directly to the manifold. The external heat exchanger is mounted just in front of the engine coolant radiator. Plumbing and pumps run between the too. The oiled-style filters and "Y" air box are custom as are all of the mounts for the pulley, belt tensioner, etc. All of the 928 engine management and fuel system is retained. Injectors are upgraded. ECUs are reprogrammed. Crank case breather system is redesigned with about 3x capacity over stock. It's good for 6 - 7 PSI which it can develop instantly. I have two 'tunes' for it: normal and tire shredder. Stock bhp for the GT is 326 and about 300 ft-lbs. The Twin-Screw should add 100-125-ish ft-lbs. It feels like 425-450. The timing on the top end has never been dialed in on a dyno. So, potential rwhp is unknown.
(*) The stock dual-resonance intake manifold is a great unit. Up to it's air flow limit. And that's a hard limit. Nothing can be done. Dispensing with it in a forced-induction context 'adds' 30-50 ft-lbs that would otherwise be lost to pumping. The main difference between the Alpha and Beta versions of this kit was the intake the design of which was aided by several folks that know their $h1+.
I realize now that this thread was really about trucks. Oops. We have a parts truck too. (Also shows some of the previous love for Audis.)
My '17 Q50S complimented my Nismo, but now that I have my TTS, i find myself driving the TTS more than my daily! Maybe it's time to trade or sell the Q50S! It only has 11K.......
I might be going the other way. I'm contemplating replacing my S6 with a Panamera Turbo. The S6 is definitely quick and fun to drive, but can also cruise in comfort and return surprisingly good fuel economy. My S6 made 589 awhp/679 ftlbs on same day my 991.1 TTS (stage 3 at the time) made 581 awhp/613 ftlbs. PM me your VIN, mileage, etc. I've been focusing on 2014+ PTT, but I might be interested in your 2013 depending on the specs.
S6 pics and videos here if you have any interest: https://photos.app.goo.gl/ARzfVCdoee38iuzE7
No Whipples here. Whipples have more than two lobes not necessarily asymmetrical. A Twin-Screw (aka Lysholm supercharger) has exactly two asymmetrical lobes.
Like I wrote: my '91. Surely you can guess? This'll help maybe:
I have a fairly modified 996 Turbo when I want a high performance car that is highly analog and a bit more visceral than the 991 TTS, and a F150 twin turbo for just about every else that the Turbos don't cover.
05-10-2021, 04:43 PM
This'll help maybe:
