Car Tech forum: Voltage Stabilizers

I'm not sure why you need a voltage stabalizer on your car? Most all components already use a zener stabalizer if they need one!! The only critical component on most cars is the computer, and it is already regulated to +5v -5v and 12v, so using an other regulator will make no difference.The voltage from your alternator is also regulated to about 14v when it is charging properly and only under very high electrical loads, at low idle will your voltage drop to around 12v ,or your Battery needs to be replaced. I wouldn't waste my money on a stabalizer and would buy a good battery instead.

there is a reason to it.If ur car is new ur warranty will get cancelled immediately and the cars are well tested before they are sent out.Do not buy something that will intefere with the electrical systems of the car as it may happen that u may not be able to start the car.

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i stumbled across this post as a result of searching for diagrams for a 12v - 12v stabalizer / regulator since noticing the engine performance of my car was far better the lower the voltage was, to a point, it seemed the engine was more responsive thru the whole range by simply having the heater fan on full. "odd" i here you say, and even " it must be pulling an earth through the fan or something". but no, ive isolated it to the input voltage to the engine management control unit. having then subsequently looked at the voltage range in the system it appears to be somewhat higher than id like as high as 15v at times. now i here you saying "your voltage regulator is no good" ( resisted using an expletive there ) but no, well not entirely, it appears alot of aftermarket/ pattern regulators are tending to put out a higher voltage. so it appears there are two cures to the problem. solder new brushes into the old regulator or stabalise the voltage on the management circuit more precisely. im tending to go for both cures. even with the oem regulator you will have a voltage swing and therefore a swing in calcultions the ecu is making.since the ecu will have internal voltage regulation how will this help i hear you say. well the fact of tha matter is its only regulating as a percentage of its expected input voltage, since in my case, and probably a lot of other peoples, the expected input voltage has changed the need for stabilization excists. hope this goes someway to helping understand the idea of voltage stabilization problem