Turbo manifold design

[RICE RACING]

Originally Posted by Libor

That Benetton is just ridiculous

Peter, what do you think is the cause of better midrange torque with plumbed wastegate? This thing shocked me, as it shouldn't enhance volumetric efficiency and hence airflow per cycle. It must be something related to wastegate valve position and how far its opened vs. target boost? I´m lost in this

Yeah the BMW Benetton (Toleman IMHO) is just gag factor to the maX! its a real history lesson in making a fast turbo car.

I have not much of an idea as to why it makes more power, except that there is some complex interactions between the intake and exhaust as TTT suggests. For the street its a nice side benefit, its way WAY to fucking loud to have any turbo 13B that does not have at least two big mufflers and a WG going through the main exhaust system.

My car is very loud when its on 30psi boost! its just a pure function of the power being made, the more boost I have run the more loud it is, when I trialed it with just one muffler it was totally abhorrent and not usable on the road in any way shape of form.... anyway I know some don't care about noise etc, but to me to stay undercover it is important