[Roland Kunz]

Hello

3. Pressure here is irrelevent.
Imagine these ports were orficies, for the sake of simplification, all recieving an equal distribution of air. If one orfice is smaller it will flow less air than all the others regardless of pressure, now remember all the cylinders still recieve the same amounts of fuel.That means LEAN burn in the "smaller orfice" cylinder.


Well sorry my english isnīt the best but some people donīt can think to the final point. The runners are not from interesst in a normal bostet system as the end from the runner is a equal chamber. You only can fill the combustion chamber and the filled amount is based on the boost level.

The problem with the 930 manifold are when the engine is runing at no or low boost or someone is changing the system and tryīs to feed more air then normal.

In fact the 930 manifold was a compromise and the engine is constructet to work in specific parameters designed to do the best from the compromise. Porsche sure could have done better and if you look at Porsche tuned engines or race engines you will see they did better. But everyone will have big horses and donīt pay them and so Porsche had to save costs. If not they would have sold the raceengines to the costumers.

If you read trough this board most have the problem that they think Porsche made lousy engines not performing like they could while others have problems to pay expensive parts and think that technology will work with cheap things. And some think both ways togehter. And rant about Porsche if things are to expensive and donīt perform like a race engine. But not willing to spend money like for a race engine.

YES IN FACT PORSCHES ARE POOR MADE AND POOR ENGENEERED RIP OFF`s.

Get a Viper, Corvette or a Ferrari for the real powershoot, Donīt waste your money or time on a Porsche as those cars are not made to be the fastest they are made to be a solid ride and work longer then a normal car. A porsche is the oppesite from a throw away car.

Grüsse