Anyone here used Mancini's 120amp alternator kit?

[Strawdawg]

I got mine about 4 years ago from DB electrical off e-bay, chrome, Mopar style 95 amp I believe?  How do you figure out how many amps your car requires? I assume you add up electrical components , but figuring out how much the draw is what I don't know? Eg electric fan, MSD box, etc....


http://www.ebay.ca/itm/NEW-CHROME-MOPAR-DODGE-PLYMOUTH-CHRYSLER-ALTERNATOR-Single-1-V-Groove-Pulley-/360622478807?pt=Motors_Car_Truck_Parts_Accessories&hash=item53f6c655d7&vxp=mtr

Brad, if the voltage stays at 13.5 or more at wot at the top end with the lights on, you have plenty of alternator.  If the voltage drops as the load comes up, then your alternator is not supplying the amperage required at the time.  These old alternators typically don't put out nearly as much current at idle as modern ones do but they should catch up as the engine speed is increased.  Unless you are idling with the lights on and the stereo booming for an hour at a time, then you may have a problem, but in a normally driven car the battery easily handles the load at idle and is recharged when you begin to move so there is no problem.  Therefore, check the voltage under normal driving conditions.  Going wot forces the ignition to pull as much current as it can so that is worse case scenario if the lights are on high beams.

[brads70]

Brad, if the voltage stays at 13.5 or more at wot at the top end with the lights on, you have plenty of alternator.  If the voltage drops as the load comes up, then your alternator is not supplying the amperage required at the time.  These old alternators typically don't put out nearly as much current at idle as modern ones do but they should catch up as the engine speed is increased.  Unless you are idling with the lights on and the stereo booming for an hour at a time, then you may have a problem, but in a normally driven car the battery easily handles the load at idle and is recharged when you begin to move so there is no problem.  Therefore, check the voltage under normal driving conditions.  Going wot forces the ignition to pull as much current as it can so that is worse case scenario if the lights are on high beams.

I'm just concerned that when I install my new 2 stage electric fan I won't have enough alternator? I guess I'll just wire it up and see what happens?

[Strawdawg]

that would be the smart thing to do...if the fans are on high, and the lights are on high and you have 13.5v when you step on it...all should be good

[mopar jack]

You can use your stock or original alternator and upgrade to 80 amps.

[Strawdawg]

yes, that is the easy option if you find the original is not quite strong enuf...alternatorparts.com has both 80 and 105 amp conversions for a rebuild....easy to do

[mopar jack]

strawdog, can you post a link? I couldn't get it to work on my post.

[Strawdawg]

the square back kits are on this page.  Look at the pics under the kits to see if you have the early version or the revised version.  I would also swap the bearings while it was apart


http://store.alternatorparts.com/repair-kits-and-upgrade-kits-5.aspx


back up a link if yours is the round back

[brads70]

Found this as a possible alternate? 

http://www.qualitypowerauto.com/catalog.php?item=557

[Strawdawg]

It's only money and a ton of overkill, but it's pretty