I have heard they have some problems with heating up and shutting off........ Idk where that came from though.

Ive got a 250 amp mechman as well and Im very pleased so far I have not tested it but my spec sheet that they sent with the alt looked very similar to your results so my best bet is they are very good alts

The Mechman alt I have does 267 amps full tilt

x2

I have heard they have some problems with heating up and shutting off........ Idk where that came from though.

i dont know anything about them having problems shuttin off, lol, that's a new one.

Now, overheating- they told me just like with any alt, never put the alternator in a scenario where it has to be wide open for long periods of time. These types of high powered alternators do not have extensive magical cooling systems like our cars have... radiators, probably because it would be too big to fit in a vehicle.

For music, they say since music is dynamic, output changes rapidly and doesnt cause that type of problem but if u were charging batts with a high output alt wide open, that's bad. Alts are suppose to be used to KEEP batts charged, not to charge them. Also, if u got a 250A alt, dont try to run a 15,000w stereo system when u know for music, it's gonna more than likely pull more than 250A constantly which would burn it up again.

Letting the alt run while the car is moving is the best cooling you can do. Letting the car sit there shile u got it revved for long periods of time will heat the engine bay up like crazy.

Looks great!!!! Ahhh a HO alty for me is $499

i payed ~500 dollars for my DC power Alt, i got it tested at 100 amps at idle + whatever my car pulls pretty nice

Just got mine back - Had it converted to external reg. Only a $99 option if you get t done when you order the alt. . .

<img src="http://i183.photobucket.com/albums/x24/bkolfo4/van002-6.jpg" border="0" class="linked-image" />

So what exactly does that allow you to do? Change the output voltage? How do you adjust it?

Just got mine back - Had it converted to external reg. Only a $99 option if you get t done when you order the alt. . .

<img src="http://i183.photobucket.com/albums/x24/bkolfo4/van002-6.jpg" border="0" class="linked-image" />

So what exactly does that allow you to do? Change the output voltage? How do you adjust it?

Yes. If you bought an alternator from Mechman with an external voltage regulator, there will be a small red metal piece on the back. On that, there is a set screw to adjust the voltage from 14.4 - 17 or 18 volts. I cant remeber off hand exactly how high it goes but its enough.

Just got mine back - Had it converted to external reg. Only a $99 option if you get t done when you order the alt. . .

<img src="http://i183.photobucket.com/albums/x24/bkolfo4/van002-6.jpg" border="0" class="linked-image" />

So what exactly does that allow you to do? Change the output voltage? How do you adjust it?

Yes. If you bought an alternator from Mechman with an external voltage regulator, there will be a small red metal piece on the back. On that, there is a set screw to adjust the voltage from 14.4 - 17 or 18 volts. I cant remeber off hand exactly how high it goes but its enough.

Yeah, I ordered my 270 amp from them about a week ago and asked about the external regulator. They told me that you really only need it if your competing, so I opted not to get it for now. Mine should be here any day, I can't wait. I didn't realize that they were so close to me until I ordered. They're in Knoxville, TN, which is just like 45 minutes away from me. I just had them ship it, I think it was free or close to it. If I end up buying an XS Power battery from them in the future, I'll just go pick it up to avoid the high shipping cost.

i guess it's ok to post this.

Retails for $649

Call them and inquire about a $50 discount.

I bought mine during group buy so the price i paid isn't what you will pay.

I saw a similar 250 amp alt for my car on mechman, but its cost is only $400.

MechMan.com - 250 Amp Alternator (10511363-00)

Is there a reason for the large price difference? I'm thinking of getting this 270 amp alt from mechman:

MechMan.com - 270 Amp Alternator (30511161-00)

The cost of the 250 and 270 amp are the same so I'm just going to go with the 270 amp one.

What are your thoughts or opinions?

Edited April 13, 201015 yr by Garr Bear