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View Full Version : regulator needed on a 16 amp system ??


MERCing
03-13-2005, 11:31 AM
I've seen 'em both ways on 16 amp systems. Some running just a rect and others running a reg also. Is a regulator needed or recommended ??

...or can I just take the older rect off and run a newer regulator since they both change the current from A/C to D/C since the reg would control the voltage ???
Steven
03-13-2005, 03:53 PM
i would like to know too. i think mines a 9 amp though :o i using a rectifier only.
T-REX
03-13-2005, 08:28 PM
Rectifier doez tha job...it's small, and it's cheep...what else need be??
MadTing
03-13-2005, 09:55 PM
If you are running EFI, you need to use a regulator, or the ecu can shut down from over / under charging.

Carb motors could use a rectifier only, but you can overcharge and damage a sealed maintenence-free battery.

A rectifier can be damaged if the battery terminals are disconnected while the engine is running.
steve
03-13-2005, 11:37 PM
without the regulator on the EFI motors as well. There are tons of 260's out there spinning 9,000+ without a regulator. The ECU will go rich if voltage drops, won't do anything with over voltage. Its got an internal regulator as well. However, your injectors DO like a consistant voltage and the voltage regulator does take some spikes off the positive rail entering the ecu. You can run it either way carb or EFI. We run without.
T-REX
03-14-2005, 09:30 AM
I run my EFI with nuth'in but a Rectifier for yeerz...A-48 box...NO PROBLEMZ...
MadTing
03-14-2005, 03:41 PM
Your fuel pump motor speed varies with supplied voltage, which determines fuel volume output. Low voltage can decrease your fuel pump output to the engine. Similarly, high voltage can increase its output.

The 16A charging system is just enough for an efi system, and there is almost no chance of overcharging. But if you have accessories, eg 12V GPS, stereo, vhf radio, etc. You will experience some low voltage, probably still greater than 12, but without any reserve capacity. The capacity and quality of your battery becomes important.
MERCing
03-14-2005, 04:24 PM
Thanks for the info guys. So far, haven't had any problems running a rect. Just trying to protect the other electronics.