New V6 3.0TFSI engine.

The Pretender · 06-28-2008, 01:46 PM

290 hp, 420 Nm of torque.

Jarod.

ImpellerCDN · 07-01-2008, 08:09 AM

though I know little about SC's. From my understanding roots blowers are low efficiency, especially at higher boost levels due to the actual compression happening upstream of the blower, ie. in the intake tract. Other blowers (and turbos) compress partially or mostly in the compressor housing.

Note peak hp and tq at same rpm (4850)... I'll bet there's much more available up top which we'll see in the S4 application (350hp according to rumour).

Audi_in_Van · 07-02-2008, 10:36 PM

sure why supercharger won over Turbo... it could be for cost/warranty/modding issues

FLACO X3 · 07-03-2008, 07:32 AM

The Pretender · 07-05-2008, 06:03 AM

Twin screw and roots is the same.

Jarod.

http://www.eaton.com/EatonCom/Produc.../TVS/index.htm

yrk2.7t@curbside · 07-06-2008, 07:49 AM

ImpellerCDN · 07-06-2008, 12:21 PM

"Unlike the Roots type supercharger, the twin-screw exhibits ..."

http://en.wikipedia.org/wiki/Twin-sc...e_supercharger

audikillsbmw · 07-06-2008, 08:45 PM

No more pulling the engine to switch out the turbos :P

audikillsbmw · 07-06-2008, 08:49 PM

is considered a "compressor." Screw-type superchargers have an internal compression ratio, which is what makes them different from roots-type superchargers. Screw compressors are also much more expensive, so something tells me Audi would avoid using them.

A400 · 08-22-2008, 09:14 AM

I have heard figures that up to 40% of the engines output is used to drive the SC, about 4% for turbo cars, and that is only if they show backpressure in exhaust.

07-01-2008, 08:09 AM	#2
ImpellerCDN New Member Garage is empty, add now Join Date: Aug 2003 Posts: 23	Really a roots blower? Sure looks like a twin screw to me... though I know little about SC's. From my understanding roots blowers are low efficiency, especially at higher boost levels due to the actual compression happening upstream of the blower, ie. in the intake tract. Other blowers (and turbos) compress partially or mostly in the compressor housing. Note peak hp and tq at same rpm (4850)... I'll bet there's much more available up top which we'll see in the S4 application (350hp according to rumour).

07-02-2008, 10:36 PM	#3
Audi_in_Van AudiWorld Senior Member Garage is empty, add now Join Date: Apr 2002 Posts: 1,379	not impressed! Mini went from Supercharger to Turbo for better performance and fuel economy, not.. sure why supercharger won over Turbo... it could be for cost/warranty/modding issues __________________ SOLD: 2001 S4 6spd, STG 1 APR, STaSIS Motorsport [700/800], STaSIS 332 Monobloc-4, Zimmerman S8 Rear Rotors, Ferodo 2500 all around. PARTS FOR SALE: BBS CH 17*8.5, Bridgestone RE070, Ecode HID, 710N, M3 lip spoiler, OEM Sport Mirrors

07-03-2008, 07:32 AM	#4
FLACO X3 AudiWorld Member Garage is empty, add now Join Date: Jan 2008 Posts: 497	they should have down a biturbo V6 and supercharged the 4.2 V8 __________________ 2000 S4: Borla Catback, H&R Coilovers, 034 Bi-Pipes, JHM boost gauge, Bailey DV's. STAGE 2 2001.5 A4 1.8TQA... RIP www.racersweb.com www.leftlanelife.com

07-05-2008, 06:03 AM	#5
The Pretender AudiWorld Member Garage is empty, add now Join Date: Dec 2007 Posts: 208	Re: Really a roots blower? Sure looks like a twin screw to me... Twin screw and roots is the same. Jarod. http://www.eaton.com/EatonCom/Produc.../TVS/index.htm __________________ -------------------------------------------------------------------- There are Pretenders among us..... Geniuses with the ability to become anyone they want to be.

07-06-2008, 07:49 AM	#6
yrk2.7t@curbside AudiWorld Super User Garage is empty, add now Join Date: Mar 2002 Posts: 4,424	Rumor is Audi was testing both designs and the SC won for fuel economy <shrugs> __________________ 2002 Allroad-with a few mods 2001.5 S4-Mods on the way

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07-06-2008, 12:21 PM	#7
ImpellerCDN New Member Garage is empty, add now Join Date: Aug 2003 Posts: 23	Thanks. Wikipedia suggested otherwise... "Unlike the Roots type supercharger, the twin-screw exhibits ..." http://en.wikipedia.org/wiki/Twin-sc...e_supercharger

07-06-2008, 08:45 PM	#8
audikillsbmw Member Garage is empty, add now Join Date: Feb 2007 Posts: 15,201	I am. Generally speaking, supercharged engines are easier to work on. No more pulling the engine to switch out the turbos :P __________________ ************************************************* Johnny B. - OFFICIAL 2007 C5 A6 POST WHORE - - OFFICIAL 2008 C5 A6 POST WHORE - R.I.P. Thor- 10/97-8/08.. I miss you buddy :( Racing Green PE 2000 A6 4.2: All options except warm weather & Sport package... MODS: Bilstein shocks, H&R Sport springs, 18x8.5" wheels (et30) with 235/40's, blacked-out RS6 upper grille, debadged, 15mm (F) and 20mm (R) spacers (SOLD,) Darintake mod (w/screen,) 00032 trans recode, high flow race cats (courtesy of 034 Motorsport,) plain black 3-spoke steering wheel, 605 "mod", painted rear valance, drilled rotors F&R, Metal Master front pads, VAST performance fan, clear corners, and various other things. FUTURE PROJECTS: NONE. She will be gone soon. Previous Rides: 1996 A4 2.8Q 1992 Acura Legend LS sedan 1986 Ford F-250 2WD

07-06-2008, 08:49 PM	#9
audikillsbmw Member Garage is empty, add now Join Date: Feb 2007 Posts: 15,201	Similar, but not the same. A roots-type unit is considered a "blower," whereas the screw-type is considered a "compressor." Screw-type superchargers have an internal compression ratio, which is what makes them different from roots-type superchargers. Screw compressors are also much more expensive, so something tells me Audi would avoid using them. __________________ ************************************************* Johnny B. - OFFICIAL 2007 C5 A6 POST WHORE - - OFFICIAL 2008 C5 A6 POST WHORE - R.I.P. Thor- 10/97-8/08.. I miss you buddy :( Racing Green PE 2000 A6 4.2: All options except warm weather & Sport package... MODS: Bilstein shocks, H&R Sport springs, 18x8.5" wheels (et30) with 235/40's, blacked-out RS6 upper grille, debadged, 15mm (F) and 20mm (R) spacers (SOLD,) Darintake mod (w/screen,) 00032 trans recode, high flow race cats (courtesy of 034 Motorsport,) plain black 3-spoke steering wheel, 605 "mod", painted rear valance, drilled rotors F&R, Metal Master front pads, VAST performance fan, clear corners, and various other things. FUTURE PROJECTS: NONE. She will be gone soon. Previous Rides: 1996 A4 2.8Q 1992 Acura Legend LS sedan 1986 Ford F-250 2WD

08-22-2008, 09:14 AM	#10
A400 AudiWorld Super User Garage is empty, add now Join Date: Sep 2003 Posts: 3,931	^^ Good thing they are as the supercharger causes much increased internal engine wear. I have heard figures that up to 40% of the engines output is used to drive the SC, about 4% for turbo cars, and that is only if they show backpressure in exhaust. __________________ Whole lotta car

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