Does the new 2.9L in the GTS and Turbo only require a single air filter ?
Yes - described as "...it has been designed with a central turbo layout where the turbochargers are arranged inside the vee of the cylinders. The very short exhaust gas paths between the combustion chambers and the turbochargers thereby ensure outstanding and immediate responsiveness..."Aren't the turbos in the newer engines located adjacent to one another on top of the
engine in the valley of the V?
In the older design, each turbo was located outboard of the V, correct?
The new 2.9L has 2 turbos, which is why I am confused as to why it has only a single filter.The new engine in the S model is a single turbo design contained within the intake valley instead of the old 3.0L which had two turbos-- one on each exhaust manifold toward the rear of the engine, hence the two air filters.
Maybe you got them reversed? This says twin turbos are sequentialI don’t know how many turbos the new S has, but biturbo and dual turbo are different. Dual turbo has 2 separate turbos of same size while biturbo is 2 sequential turbos (one small and one big) in one Unit.
I was too lazy to google. My bad! Apparently, twin turbo and biturbo are interchangeable. The turbo design can be either way, i.e., 2 same sized turbos or 2 sequential turbos (one small and one large).Maybe you got them reversed? This says twin turbos are sequential
The term twin turbo has been often given to vehicles that use sequential turbos, a small one for low rpm torque, and a larger one for higher rpms and power. The biturbosystem uses two equally sized turbos, one fed by cylinders 1-3, and the other by cylinders 4-6. They are not sequential or in series, but in parallel.
Not to mention the manufacturing co$t savings - one fewer air filter, air filter housing, ducting, etc.Perhaps with the two turbo air intakes now sitting right next to each other in the V, there was less incentive to have separate intake air ducting and filtering.
From what I've read one turbo for each cylinder bank plus center location in the V eliminated some of the lag associated with long plumbing. Win, win.2 identical turbos = both working at the same time/rpm -> double the output
2 sequential turbos = small turbo working at lower rpms and large turbo working at higher rpms -> only one turbo working at a time, but turbo effect kicks in earlier (at very low rpm)