Inspired by these threads... and the performance changes I saw with the lightweight pulley swap...
I picked up one of these to swap in
The goal of this thread is to document time in use (hours before failure) aka MTBF (mean time between failure), install parts, process & issues encountered and performance changes (throttle response & mpg changes). I already know the light weight pulleys affected throttle response noticeably (2 lb drop of rotational mass & smaller fan pulley diameter) so for me its a no-brainer. Two concerns I have, slow steep dirt roads heading to trailheads and the MTBF. My truck sees 2-3000 miles a month so if any issues are going to pop up, should be fairly quick.
Debating when the install happens, I have 2 longer road trips coming up, one of which is Sunday and I'd prefer to have some local run time before that trip, 2nd one is the following Saturday... and actually, there are 3 more following that (trail work season has returned)
Also, a side note, I will probably be updating/replacing my fan shroud soon as well, it needs some love as its getting a tad bit crowded with some added relays.
Anyways... fun in the sun continues.
edit: 09/27/2019, 418,2xx miles, hr = 9999 <- may be maxed out <- Confirmed, max hours recorded can only be 9999 on my truck.
Edit: belt p/n for using the OEM pulley plus the fluidampr pulley
Gates p/n K081102HD
Add in the life span of the belt
before mpg, 21.0** mpg
after mpg 21.93* mpg (same tune as before)
retunned, 21.822 mpg, (apples to apples comparison to the before mpg, same work commute route) 12/7/2019 (mild week of temps & little rain)
424284 miles 12/4/2019