SRowells Diablo 1.8 - Jenvey 45s & OMEX600

[cwspellowe]

Right, just to clear up about the resonator bung...

Resonators are used to "tune" air flow in the inlet chambers to assist the pulsing flow of air into the cylinders. NASP cars obviously don't have anything to force air into the cylinders so the pulse tuning of the resonant frequencies can assist the flow of air. Basically so each "pulse" of air hits the mouth of the cylinder as the valve opens. On the GTI6 there are two resonators, one on the airbox to adjust the inlet noise and one on the inlet manifold to fine tune the air flow.

On the GTI6, replacing the one on the manifold actually creates MORE noise, more of a throaty low down grunty noise.

There would normally be no need to change the helmholtz resonator on a standard gti6 engine as it has been designed in such a way as to improve air flow in that particular engine. Change the engine and it has nowhere near the same effect. Change the induction setup of the GTI6 engine and again, it alters how effective the resonator is. I ended up using a bung as 1. my induction setup was a lot different to standard and 2. I felt like it.

I don't think anyone really knows exactly what difference it makes on the 1.8 as noone really knows the science of the airflow of the GTI6 manifold in combination with the 1.8 engine. It may make more noise, maybe less noise, more or less power, different torque spread, who knows? It won't create a "massive flat spot" all by itself though.