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View Full Version : For Sale Trade Db Electrical 250 amp alternator


tjl006
10-10-2010, 05:20 PM
I would like to trade my Low mileage Db electrical 260 amp alternator for a new or low mile stock oem alternator. Db one works fine but doesnt produce the same output at idle in drive as the factory alternator. I do mostly stop and go local driving and at idle at stop lights is where I need the juice. PM if intrested.
babbage
10-10-2010, 07:46 PM
So factory puts out more volts at idle than DB? - Can't you get a smaller alternator pulley?
fastblackmerc
10-10-2010, 07:48 PM
I don't have a problem with my 250 alternator from DB. What is your idle set at?
LOWBUCKMM
10-10-2010, 08:09 PM
Ill trade ya. Mine has 47 k on it
tjl006
10-10-2010, 08:38 PM
I don't have a problem with my 250 alternator from DB. What is your idle set at?

Dont know off the top of my head. Its whatever Zack sets the idle at in his tune.
stryker
10-11-2010, 04:49 PM
I don't have a problem with my 250 alternator from DB. What is your idle set at? :confused: Sorry mangs but what means for " DB " żżżżż??????
fastblackmerc
10-11-2010, 05:04 PM
:confused: Sorry mangs but what means for " DB " żżżżż??????

"DB Electrical" is the company that sells the alternator.
RacerX
10-12-2010, 10:23 AM
Dont know off the top of my head. Its whatever Zack sets the idle at in his tune.
You have underdrive pulleys I take it.
tjl006
10-12-2010, 02:09 PM
You have underdrive pulleys I take it.
No underdrive pullies.
cougar9150
10-13-2010, 12:11 PM
I had the same issue with a PA Performance unit on my first MM. They walked me through a few test points over the phone and sent me a new one with return packing slip in it for the old unit.

Have you asked Db about it? I would think an exchange is in order.
Zack
10-13-2010, 12:17 PM
Way too many amps for such a small case.
tjl006
10-13-2010, 01:13 PM
I had the same issue with a PA Performance unit on my first MM. They walked me through a few test points over the phone and sent me a new one with return packing slip in it for the old unit.

Have you asked Db about it? I would think an exchange is in order.

I contacted them they said it may be a slipping belt. I replaced the belt same problem. I think it just that the cars idle is lower when I am in drive with my foot on the brake and the alternator doesnt produce enough amps at this speed. The alternator works fine but the dropping voltmeter at lights and stop sighns just bothers me.
Zack
10-13-2010, 01:43 PM
Point your leaf blower at the back of the alternator at idle and tell us if the voltage goes up.

When the rectifier bridge isnt getting sufficient airflow the voltage drops.
FordNut
10-13-2010, 02:03 PM
I contacted them they said it may be a slipping belt. I replaced the belt same problem. I think it just that the cars idle is lower when I am in drive with my foot on the brake and the alternator doesnt produce enough amps at this speed. The alternator works fine but the dropping voltmeter at lights and stop sighns just bothers me.

Exact same thing happens to me whether I'm running a stocker or a DB.