2.0L EcoBoost Underdrive Pulley

[ABMaverick]

Is anyone running U/D pulleys? I’ve ran them in the past on different vehicles and was usually pretty happy with them, but can only seem to find a single place selling them and I’m wondering why more aren’t offering them as they tend to be a pretty reliable change up for general use.

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[Carlitos_92]

Why?

Personally, I am not willing to give up electrical or A/C compressor performance.

The only pulley I’d ever consider fiddling with would be on a supercharger, and we clearly don’t have that.

 

[ABMaverick]

Well I rarely run my AC, it’s not that hot here, and I’m sure the electrical “loss” is negligible when driving if I haven’t added any extra loads to the truck.
but really I was just wondering about peoples experience with them.

 

[Carlitos_92]

Well I rarely run my AC, it’s not that hot here, and I’m sure the electrical “loss” is negligible when driving if I haven’t added any extra loads to the truck.
but really I was just wondering about peoples experience with them.

Quick search of the forum shows very few engine-related pulley topics, and even among those, the biggest conversation was from a dude who had blown an engine and was going balls-out with a methanol-injected 2.3 swap. Feel free to peruse, but you are probably charting new waters if you are just looking for efficiency.

https://www.mavericktruckclub.com/forum/search/4884794/?q=Pulley&o=date

 

[Solaryellow]

Back in the 90's these were the rage. Add some u/d pullies and free up some hp. 2025 I think that ship has sailed or sunk?

 

[Tbone289]

With EPAS and smart alternators that dramatically reduce parasitic drag, I can't imagine that an underdrive pulley would have much effect at all.

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