Comments on: Audi reveals details on 3.0 TSFI V6

By: deutschetouring1337

deutschetouring1337 — Sat, 28 Jun 2008 05:58:27 +0000

Hmm Like I said before months back……….

By: Veda

Veda — Sat, 28 Jun 2008 02:40:19 +0000

It might not even reach the standard 300 HP of today’s cars, but Audi has always been the most fuel efficient of the germans. So that’s probably what they had in mind when they designed this. Anyway, this is a welcome addition since they didn’t have anything powerful below the V8’s to drive their bigger cars.

By: bigp

bigp — Fri, 27 Jun 2008 20:08:30 +0000

bmw 3.0 has some one to fight because it just killing the other engines in its class

By: soon

soon — Fri, 27 Jun 2008 19:56:48 +0000

the bypass system works so well that the supercharger only draws 1/2hp (or so) when in bypass… the air is actually directed thru the rotors, thru the bypass then back into the inlet (high pressure to low)

the HP/Torque #’s are able to be lower because the “under the curve” torque is higher at the lower RPM’s & flat across the entire range, so the total HP does not have to be as high…

By: Z06ified

Z06ified — Fri, 27 Jun 2008 19:09:33 +0000

It seems crazy with all the high horsepower numbers being thrown around lately, but 290hp doesn’t sound like much anymore. Most of its competition, BMW, Cadillac, Lexus, Infiniti, etc. all have engines with more than 300hp on their entry level models.

By: bdizzlefizzle

bdizzlefizzle — Fri, 27 Jun 2008 18:54:07 +0000

It’s TFSI, not TSFI. LLN gets this wrong too much.

By: RaineMan

RaineMan — Fri, 27 Jun 2008 18:40:43 +0000

It’s nice to see that there is still someone out there using a roots sc. I love the one on my LSJ… no lag… plenty of torque… and that lovely blower whine.

Soon –> IDK how well a bypass valve setup would work here b/c the blower is replacing the intake manifold. Most bypass setups have the blower sitting atop the intake manifold, so air can be directed around the blower and into the engine. With no proper intake manifold the air has to go through the blower… whether the rotors are spinning or not.

By: soon

soon — Fri, 27 Jun 2008 18:07:12 +0000

the dynamics has not been proven (documented for public knowledge) but the ROOTS supercharger “actually” (IMOP) helps an engines VE over an NA engine, the use of a bypass valve Vs. a clutch, is just as effective…

By: El Aleman

El Aleman — Fri, 27 Jun 2008 17:47:44 +0000

I think the efficiency would still be lower than in a naturally aspirated engine, even with the clutch, since there is no proper intake manifold, since it’s replaced by the supercharger..

By: 928dreamer

928dreamer — Fri, 27 Jun 2008 16:31:36 +0000

The efficiency of superchargers has improved dramatically over the last several years. One of the main inefficences of belt driven forced induction now is the drag of the belt on the system in low boost settings. It takes power to turn the supercharger even if it is not needed at the time. If this is eliminated with a clutch there is no reason that a supercharger should not start reaching the levels of efficiency of turbochargers. Other benefits are reduction of turbo lag (I know not as big of a problem with modern turbos, but still there) and freer flowing exhaust.

By: soon

soon — Fri, 27 Jun 2008 16:23:18 +0000

I’m sure they have done their home work on the complete system…. emission, packaging, performance, etc… they would have used “Twin Turbo’s” if they were the BEST……. public perception is a different thing…

By: mr_hunter

mr_hunter — Fri, 27 Jun 2008 16:10:31 +0000

I must agree; turbo’s are more efficient. When I first read that audi was making a supercharged V6 I just figured the report was wrong, guess not.

By: manhertm

manhertm — Fri, 27 Jun 2008 15:59:41 +0000

Weeeeak, gimme a twin turbo V-6 and stop FNing around.