I came across this question from one of the Audi forum. One guys asked, why Audi S4 is a "Bi-Turbo", instead of "Twin-Turbo".
The only explanation I can think of is that "Twin-Turbo" uses 2 turbos, usually one is larger then another, spinning at different rev range to eliminate turbo lag, while "Bi-Turbo" uses 2 turbos on each bank of cylinders and spinning simutaniously(spelling??)..... What do you think?? Andy Kuo ------------------ <UL TYPE=SQUARE> <LI>1992 Mercedes-Benz 400SE <LI>Pearl Grey/Black Leather </UL> ICQ#26950002 Mercedes Owners ICQ ActiveList ID#61730549 Mercedes S-Class Page http://akry.web.com http://akry.homestead.com/files/mercedes_benz_2.gif |
I have always thought that different manufacturers call same things(at least the idea is same, there could be slight differencies) with different names like VTEC, Vanos, Variocam etc.
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Yes, I have thought that it's just some fancy names given by different auto makers for the same concept of design. However, I peek through S4's engine bay, there's turo on each side of bank, and 2 intercoolers feeding air, while MR2 Twin Turbo uses ONE intercooler on the side, and feeds both turbo. That's how I ended up with my conclusion above....
Andy Kuo ------------------ <UL TYPE=SQUARE> <LI>1992 Mercedes-Benz 400SE <LI>Pearl Grey/Black Leather </UL> ICQ#26950002 Mercedes Owners ICQ ActiveList ID#61730549 Mercedes S-Class Page http://akry.web.com http://akry.homestead.com/files/mercedes_benz_2.gif |
I think that the different name theory applies here. I know that Maserati used the Bi-turbo name as well...
------------------ Benzmac: Donnie Drummonds 1991 GMC Syclone ASE CERTIFIED MASTER AUTO TECHNICIAN SERVICE MANAGER FOR 14 BAY FACILITY MERCEDES SPECIALIST 8 YRS PARTNER IN MERCEDESSHOP.COM |
Akry, I belive you're right. The Audi A6 2.7T and the Audi S4 both use the 2.7L Bi-Turbo V6. From what I garnered from Audi, each bank of cylinders has it's own turbocharger.
-Nukta ------------------ 2000 Volkswagen New Beetle GLS 2.0L, Techno Blue, Gray Leather, Luxury Package, Cold Weather Package, Leather Package, 5-speed, Delivered August 3, 1999 Hakuna Matata! |
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