In Reply to: Resonators-influence on performance? posted by Manoj on March 09, 1999 at 20:20:50:
My understanding of resonators is that they create a standing wave. Contarary to what the name implies, a standing wave is actually considered to be one of the best modes of operation for a fluid flowing in a tube, as it maximizes the flow rate. The best ones are those that are flexible enough to adjust to a wide range of rpms. The main problems with them is that they are usually designed to target a specific rpm range (usually narrow). What this means is that you sometimes loose out in the rest.
The idea has merit though, otherwise BMW wouldn't have made variable length intake runners on the previous M5.
But be cautious and ask specific questions. More importantly, demand dyno plots that you can call the source of and verify (i.e. call the dyno owner and ask them to check their log).