| Author |
Message |
    
Jon666
Intermediate Member
Username: Jon666
Post Number: 434
Registered: 11-2003
| | Posted on Tuesday, August 16, 2011 - 5:25 pm: | 
|
i read somewhere on here you are supposed to run the magnum 257 hp at 14.2 volts
is this true. i just ordered one and i need to know
thanks
what don't kill you makes you stronger
|
Funtimebob
Intermediate Member
Username: Funtimebob
Post Number: 292
Registered: 5-2002
| | Posted on Tuesday, August 16, 2011 - 10:19 pm: |
|
http://www.cbtricks.com/radios/rflimited/magnum_257/graphics/magnum_257_om.pdf
Dyslexics of the world UNTIE!
73 De Bubba Honorary O.F.
|
Onelasttime
Junior Member
Username: Onelasttime
Post Number: 39
Registered: 8-2011
| | Posted on Thursday, August 25, 2011 - 10:04 pm: |
|
First most automotive electronics will list 12-13.8 volts as their target norm and 15 volts as their limit where they start to let the smoke out.....LOL
Now with that said any modern automotive vehicle will likely have it's voltage regulator set in the 14.3-14.8 volt range. Most GM and Toyota's vehicles are in this range. I had two Toyota's one 4Runner and one Tacoma that are just over 15 volts on my Fluke VOM. The Buick is at 14.8 but it will vary some with Temp. from 14.3-15 volts then stabilizes at about 14.8. The colder the temp the higher the voltage should be for charging.
Oh and all of this is because of Lead Calcium construction of the plates. 13 volts will not charge fully a hybrid lead calcium maintenance free battery at all no matter how long you drive!!! If they went back to just lead or lead/antimony battery plates we could charge them at 13-13.8 volts no problem. Lead and silver or lead and gold with no calcium would work fantstic too but I am not going to hold my breath. Normaly if they do put some silver in it is minor minor amount.
Because my vehicles especially my Toyota's put out just over 15 volts on of the modifications I did was to replace all the capacitors in my RCI with caps that could take more voltage and had more capacitance even though as voltage and current increase you can use smaller capacity caps. Normally when people would replace the weak voltage regulator in the old RCI 2950's they would recap the board. So if you really want to run the voltage up on your radio you might look into what need's to be changed out in the radio. SInce it is Surface Mount Devices I would not go that route at all. I would try to stay in a safe range for the radio and add power adder's if I needed them and leave the radio alone if I could.
Another thing have you even checked your power output now? Very few vechiles are any where near 12.6 volts with the engine running and most 12 volt power supplies are usualy above 12.5 volts unless they have a knob to adjust the power output. Most will be some place inthe 12.5-13.8 range. A lot of 12 volt devices need slightly more then 12 volts to activate relays and such inside.
Also some car's like the Mitsubishi Eclipse needed something like 13.8 volts to run their ABS system so even if the car had enough voltage to turn the starter over if it fell below what the ABS needed the computer would not energize the coils or fire the fuel injectors to keep you from starting the car with an ABS system that might not work properly. My point is that until you check your voltage on the vehicle with the engine running you have no clue where you are at? You might be at 14 volts already??? |
