How HSV LS3 is now 456hp

[pir4te]

According to MOTOR magazine the intake and headers are hand assembled. The real surprise is the Bi-Modal Intake
The bi-modal air intake has a valve that increases the amount of air sucked into the engine depending on throttle position and engine revs for extra power. When closed, torque (or pulling power) is enhanced at lower engine speeds.
No, this is a separate device to the TB!!
Doesn't give much away...
http://img.tapatalk.com/d/13/07/16/y4ydumu2.jpg
The R8’s Electronic Driver Interface (EDI) is carried over from the preceding model, now displaying interactive mapping for the bi-modal exhaust, bi-modal air intake and stability control functions via an app on the MyLink system.
Still looking for more detail as it is very interesting.
Initial consensus is that perhaps a similar setup as used on our Ford N/A I6, which if that is the case is a good thing. Allows good low down torque with, in effect, a shorter intake runner but allows the extra needed up top.
The N/A I6's have a butterfly valve in the intake manifold. Only downside is that its noisy as all hell. Kinda like blubblubblub below 3250rpm, then bwaaaaaaah above.
The HSV has a system before the TB, where's Ford's is after.

[Crazy Paul]

Interesting indeed, I didn't know about the bi-modal intake.
I saw a couple 340kW Clubbies earlier in the week at a dealership but was too busy looking at other things to lift the hood and have a look.

(I remember around June 2005 when VZ HSV's first came out, in their first week a mate and I went to an HSV new car showroom because we couldn't figure out something on their brand new at the time LS2. The HSV salesman tried to tell us that what we were doing in our shed with a new crate LS2 couldn't be done. He couldn't answer any tech questions, but the next time he walked around to the other side of the brand new car all he saw were my feet sticking out from under the drivers door. Suitably distracted, my friend took the opportunity to whip off the engine cover and have a look at what we needed to know. About 3 days later I drove my LS2 VX back to the showroom & asked the salesman if he still thought it couldn't be done. My friend and I still laugh about that outing to the showroom.)

[pir4te]

Haha! Yeah secret go fast bits, sci-fi tech rumours, lots of buzz atm. Gonna love a bit more cloak and dagger over the next couple of weeks until the embargo lifts and the big reveal... the Last of the V8 Interceptors... GTS.
It did occur to me that with the R8 SV perhaps the thing in front of the throttle body is a actually a red herring - not a fish but a fancy device for Euro 5 emissions compliance.

[Crazy Paul]

perhaps the thing in front of the throttle body is a actually a red herring - not a fish but a fancy device for Euro 5 emissions compliance.
Should I have kept my Brock Energy Polarizer shares?

[pir4te]

Ah Brocky, lest we forget! RIP

[pir4te]

if you take the air filter out you will see an opening leading to another box that has a vacuum actuated valve. look through the grille openings under the lhs headlight and you will see it is open, that is where the bi modal grabs the extra air from. the rhs is actually blocked.
http://img.tapatalk.com/d/13/09/26/y3a5uga5.jpg

[AutoCade]

interesting. i knew the V6 uses a valve for runner lengths.. but opening a second air intake.. hmm

[Chewy]

Sounds like the original SHO... lol

[Crazy Paul]

interesting. i knew the V6 uses a valve for runner lengths.. but opening a second air intake.. hmm
It may actually have 2 valves.
One bi-modal valve on the intake piping and one (12586694) inside the intake manifold like the V6.
I haven't had a look under the hood to confirm yet.
Different headers and cats on the 340 LS3 to the others also.

[pir4te]

Apparently if you take the air filter out you will see an opening leading to another box that has a vacuum actuated valve. look through the grille openings under the lhs headlight and you will see it is open, that is where the bi modal grabs the extra air from. the rhs is actually blocked.
http://img.tapatalk.com/d/13/11/10/3ejurama.jpg