If you live somewhere w/o emissions testing can gut catalytic converter. Yields a lower & mellower tone (and greatly reduced backpressure). Hollow shell seems to act like a resonating chamber. Make sure idle speed isn't too high. PRV rather buzzy at speed. "Accessory" key position same as car energized (as if were driving). Some items like fuel pump need additional signal from actual rotating engine, but idle speed motor not one of them. In factory configuration motor runs whenever car energized and throttle closed microswitch activated. Starting/cranking key position sends other signals, such as cold start valve. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "TalksToGod" <5n-@xxxx> wrote: > I would like to get more out of my DeLorean engine, or make it sound > like it is not so small. Does anyone know any exhaust mods, any air > intake/filter mods etc. to make this so? Also, is my "Idle/low speed > motor (102502)" supposed to always be running, even when the key is > just on accessories? Thank you all -