yanlapanic -
Here's a URL that MetroMPG pointed out to me :
Fuel saving gadgets - a professional engineer's view
Quote:
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Where I am less convinced is when the claims are extended to significantly improved fuel economy or torque / power. Modern vehicle wiring and ECUs are already designed to operate in a harsh electrical environment. They cope with conditions from maybe 8V starting with a nearly-flat battery to 16V on a boost charge, and with electrical interference from mobile telephones etc, without failure. The ECU runs internally at 5V or even less and is heavily stabilised to ensure the processor runs fault-free at all times. Many modern ECUs repeatedly self-check and would shut down the engine entirely if any kind of fault condition occurred. Overall, it is hard to envisage how a more stable electrical supply could significantly improve engine economy, emissions or performance on a vehicle in good condition.
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CarloSW2