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Jan 5, 2013 | 11:34 AM

mustang9701

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new alternator??

i got my new DC alternator today. i notice the pulley size is different. is this ok or normal or am i to change the pulley.
Are there benefits to a smaller pulley?

Jan 5, 2013 | 11:39 AM

r2millers

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From: Southern Cal

It turns faster and will ultimately create more amp output at lower rpms. Unless the tensioner won't tighten the serpentine belt properly, I don't see any reason to worry about it.

Jan 5, 2013 | 03:02 PM

f-350 turbo

Mountain Pass

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From: phoenix

Quote:

Originally Posted by mustang9701

i got my new DC alternator today. i notice the pulley size is different. is this ok or normal or am i to change the pulley.
Are there benefits to a smaller pulley?

That is normal. What model did you get.

Jan 5, 2013 | 05:42 PM

mustang9701

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185 amp, not sure of model just said OEM

Jan 5, 2013 | 06:07 PM

TJK1

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From: Virginia Beach

How long did it take for you to get it? I just ordered the same one last week

Jan 5, 2013 | 06:21 PM

BLADE35

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From: Saratoga Springs,UT

Hell Ya LEAVE the Smaller Pulley On it

Thats part of HOW it will Generate MORE Power at Idel

If the belt slips then you mighrt be Due for Belt and Or Belt Tensioner

Jan 5, 2013 | 06:36 PM

69cj

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From: Middle Tn.

Quote:

Originally Posted by BLADE35

Hell Ya LEAVE the Smaller Pulley On it

Thats part of HOW it will Generate MORE Power at Idel

If the belt slips then you mighrt be Due for Belt and Or Belt Tensioner

Or possibly the spacers?

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Jan 5, 2013 | 09:01 PM

BLADE35

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From: Saratoga Springs,UT

Quote:

Originally Posted by Bullitt390

FWIW my 3G has the smaller pulley and no spacers and works just fine.

Josh

Oh Really Thats Cool

Jan 5, 2013 | 09:23 PM

#10

Bullitt390

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Quote:

Originally Posted by BLADE35

Oh Really Thats Cool

The OBS 7.3 Powerstroke had the 3G with small pulley.

Even the stock 6G could benefit from the small pulley.

Josh

Jan 5, 2013 | 11:48 PM

#11

Fulthrotl

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Joined: Apr 2012

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Quote:

Originally Posted by mustang9701

i got my new DC alternator today. i notice the pulley size is different. is this ok or normal or am i to change the pulley.
Are there benefits to a smaller pulley?

that is why there are spacers, so the OUTSIDE edge of the
pulley is the same distance away, so the belt tensioner
can maintain correct tension.

measure the two pulleys, take the difference in diameter,
and divide it by two.....

that is the thickness of the spacers.... mostly...

the smaller pulley spins faster, and generates more
current at engine idle.... their 270 amp unit does
200 amps output at idle..... ya gotta spin it, there
is no free lunch.

Jan 6, 2013 | 08:50 AM

#12

mustang9701

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Quote:

Originally Posted by TJK1

How long did it take for you to get it? I just ordered the same one last week

i ordred mine dec 22, just recieved it on 1-5, the two holidays in between didnt help matters so im happy with the time. i imagine where you order from matters too. i got it from dc directly

Jan 6, 2013 | 08:53 AM

#13

mustang9701

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its on and belt is tight and no spacers needed or even came with it. the pulley looks about the same size as my das's 7.3. SGII says 14.2 at idle.

Jan 6, 2013 | 01:53 PM

#14

BLADE35

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From: Saratoga Springs,UT

Quote:

Originally Posted by mustang9701

its on and belt is tight and no spacers needed or even came with it. the pulley looks about the same size as my das's 7.3. SGII says 14.2 at idle.

Sounds Good So Far

They did recomend a Wire upgrade to between the Alt and the Passengerside Battery

Here is Mine Also Note this Red Wire also has a Fusable Link in it (Its the Peice of Grey Wire right at alt end)