mechman 250amp alt and xs power d1400

[150dbs 10+ year member]

The alt is adjustable voltage and the battery is 14v. I know that there is no definite answer but do you guys think that this would be sufficient to power 3 amps? (saz 3000d a jl 500/5 and a jl e4300) Maybe make it two batteries? Better alt?(recommendation for 1 if so)

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[Phoenix Risen 10+ year member]

to me that seems like a lot of amp for 1 batt. maybe get 2-3 deka 9a31s or something similar, that should be sufficient to power what your wanting to run.

 

[150dbs 10+ year member]

id like to stick to two batteries if possible. what you think of xs power 3100 or a 3400 (or 2) or some good deka's also the whole point of the d1400 was that its 14 volts

 

[150dbs 10+ year member]

or what about 2 d1400s

 

[150dbs 10+ year member]

or what about 2 d1400s

 

[Buck 5,000+ posts]

You could just get 1 D3100, and you'd prolly be fine.

 

[Phoenix Risen 10+ year member]

unless your alt will put out 16 volts then you wont be able to charge a 14 volt battery and the d3100 should be enough, and if it proves not to be you can always add another

 

[150dbs 10+ year member]

The alt can charge the 14v battery but, I will prob scrap that idea since noone has recomended it and everyone seems to say just grab a good 12v battery. I'm gonna look into the xs power

 

[Millertime1028 10+ year member]

If you are using an external regulator with the alt you will be able to charge @ 16.1- 16.5v which is what the d1400s need to be charged at. If not you will be under charging them. The d1400's are awesome performers for their size. I'm currently using them in my most current setup and I am more then happy with them. Talk to Matthew @ Mechman and he'll let ya know himself about how they perform. I switched out d3100's for the 1400's

 

[150dbs 10+ year member]

Anyone know if they make a bracket to hold a bigger battery? The 3100 is three inches bigger than the yellow top i have now. The xs d3400 is a perfect fit for my truck but I don't think its as powerful at the 3100.

 

[Millertime1028 10+ year member]

Just get the H.O alt, a d3400 for the front and a d3100 in the rear. That will suffice for what your running.

 

[Phoenix Risen 10+ year member]

^^^ agreed

 

[Buck 5,000+ posts]

If you are using an external regulator with the alt you will be able to charge @ 16.1- 16.5v which is what the d1400s need to be charged at. If not you will be under charging them. The d1400's are awesome performers for their size. I'm currently using them in my most current setup and I am more then happy with them. Talk to Matthew @ Mechman and he'll let ya know himself about how they perform. I switched out d3100's for the 1400's

The 1400's are good. I sat in Matt's Mustang and I'm pretty he had 2 1400's powering 2 kicker 2500's on a 21" DP. **** was loud.

 

[sexy 10+ year member]

your car will need to stay at the voltage it was designed to be at or you will fry the computer.

total up the fuses for the three amps like three 20s and two fourties and whatever. Use that as a rough estimate of how much the amps will draw add another 30 to 50 for the car lights heater ect. the more batteries you add the more load you will place on an alternator so dont just add batteries that is a common mistake that people make every day. buy some sort of voltage meter so you can see what your alt is able to do. what size alt you need is not a mater of opinion it is a simple mathmatical quesstion that you can figure out by asking the right people or doing a search.

 

[Millertime1028 10+ year member]

your car will need to stay at the voltage it was designed to be at or you will fry the computer..

^ Not quite true. Alot of cars have a threshhold in how much voltage they can handle through the ecu/bcm/ecm, etc... When an internal regulator goes bad on a stock alt your voltage can spike upwards of 18-19v in some cases. Car companies design their "computers" around this, knowing that this does happen, therefore saving the rest of the vehicles electronics when this happens. For instance, I have been running 16.5v setup in me Jeep Cherokee for 4 months now without 1 issue. I have seen about 5 other vehicles without an isolated electrical, all charging @ 16v-17v without any ecu related issues. Some things you stated are correct, such as more batteries, the more of the load on a alt. In the OP's case he has stated that he will be using a Mechman 250 alt therefore making your statement somewhat irrellavent in this case. Having (2) decent size batterys will not affect the alt as you may think it would. If it were a stock alt then it could possible be an issue for that alt to charge the batt's sufficiently