Quote Originally Posted by Evodelta View Post
It's a shame there aren't some better pictures of them. The inlet manifolds look interesting, note the individual throttles and very long runners - good for torque.
The long runners create air momentum going into the cylinder head and will help with torque, very good for NA applications. But in my opinion, on a turbo engine you don't need it, with 1 bar boost behind the air, they go in pronto.

If you look at a dynosheet I posted in another thread, you will see the boost is directly related to the torque and as soon as the wastegate open the torque stop climbing and as long as the boost stay at the same level, so does the torque.

Individual throttles are better than one throttle during normal street driving as it get rid of pumping losses, this is very noticable on an NA engine, we just used it on a Trofeo racer. But on a turbo car I have not yet seen great results with ITBs, and I have seen 3 turboed M3s. I prefer a large plenum and single throttle for a turbo engine.