Damper pulleys

[claude.cot3]

Hi everyone, I am trying to figure out what is the difference between crankshaft damper pulleys on the 5.0L engines.

By looking at OE part #
2011-14 regular 5.0 is: BR3Z-6312-A
BOSS302 is: CR3Z-6312-A
2015-2017 (GT350 and regular) is: FR3Z-6312-A

aside from different part numbers anyone knows differences between them?

My guess is probably a smaller pulley for the Boss302 (underdrive), and maybe different belt width # of ribs for the newer models.

Let me know if you have some real datas, info or anything to help out!

 

[captdistraction]

So far widths have been the same but the weights are different between all the parts.

I can’t even begin to theorize which weight works best for a given application. I’m using the gen2 GT damper on my newest build but only due to availability


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[claude.cot3]

Any weight specs available then? So I guess the a/c belt are all the same between the different models?