It's not so much better flow as such... its all to do with shock waves. When the intake valve is open air is rushing in at speed and so has inertia. Then the valve slams shut and the moving air hits it and creates a pressure wave that bounces off the intake valve and the back along the intake trumpet. Eventually this wave will bounce back into the intake trumpet and push air along with it. What you then want to do is time the arrival of this pressure wave with the opening of the intake valve. This is why the length of the intake trumpet is important - shorter trumpets are useful at high rpm whilst longer trumpets are more suited to the longer time between valve opening.hlbeckley wrote:
So after chatting to JHM abt it, removing the seperators ala MRC de flap, combined with intake spacers and this longer intake tube/tunnel mean better flow and small low rev torque pick up
So they say! I am in just for the reduced heat soak as summer 38c here means she gets hot quick
The net effect is that it doesn't really (give or take) change the amount of torque produced but more where it is made. The downside is that as you don't add more torque, moving the curve to the left will reduce top end power (and vice versa). In this instance I don't think there is any information posted so can't guess by how much.
If you look at revvy race engines the intake trumpets are tiny as they are all about top end torque and on some exotic engines they feature variable length intakes to make the most of this effect.