Came across this, thought it looked pretty interesting...
http://www.sigmaautomotive.com/elect...trocharger.php
Introduction
Developed in conjunction with Texas A&M University, the ELECTROCHARGER is the most significant advancement in automotive performance in the past 100 years. It is the world's first retro-fittable hybrid electric system and is the newest technology in engine performance adders such as Turbochargers, Superchargers and Nitrous Oxide systems and can be utilized in conjunction with these conventional power adders as well.
The ELECTROCHARGER is a power adder that takes the place of your alternator and runs in parallel with the engine and all of it's modifications and increases the initial acceleration rate of your vehicle from idle, which provides faster acceleration and power right off the line.
Ongoing analysis has shown that, depending on vehicle and modifications, you can substantially improve fuel economy in city driving, reduce emissions and decrease your 0-60 and 1/4 mile times. Actual dynamometer results for select vehicles will be posted this summer on this website.
The ELECTROCHARGER is powered by a Super Capacitor Battery Pack (SCBP) that is located in the trunk of the vehicle which provides juice to the motor instantly on demand. When not adding power to the engines crankshaft, the ELECTROCHARGER switches to generator mode, thereby maintaining the SCBP at it's full State of Charge (SOC) and providing power for the vehicle electrical system. If the SCBP should become depleted, then under normal driving conditions, the SCBP can be charged back up in as little as 8 minutes, but this is unlikely due to regenerative braking. An optional stand-alone charger is available if your into drag racing and need a faster charging time without cruising around.
The Electrocharger allows you to take a tax Deduction on the purchase of the Electrocharger and combined with the savings you will see in fuel economy, the Electrocharger pays for itself in a very short time. Installing the ElectrochargerTM on your vehicle does not void your vehicle warranty coverage either.