I know that this question has been asked countless times so before anyone tells me to search. I just want to hear from some of the ppl that have them preferably ones that have had the pulley for some time like over 15k with it. I have read many of the threads about it but I havent come across any that can prove or disprove engine wear caused from it if anyone has any input it would be appreciated.

 

How can you prove or disprove engine wear caused by a pulley?

 

i have read in many cases on other cars changing the pulley can cause many problems one such as the pulley causing oil leaks I just put that into engine wear

 

I have seen numerous posts as well, but never one that can show the damage was caused by the pulley itself. 20-25k miles with mine on and no problems.

 

I guess its a hit or miss. I remember one kid had a UR pulley on his celica back in the day and cracked his oil pump from vibrations.

 

ur underdrive crank pulley 2k miles and im still good

 

hey thanks for that guys now for the other question was it noticeable cuz it seems that its a hit and miss thing as well. If anyone dynoed before and after it would be great. I just wonder cuz I have read that with full bolt ons and the osiris tune and the pulley it may be good for up to 350hp and im not crazy thinking rwhp

 

My butt dyno sucks, but I didn't really notice much if any gains. Only discernible difference I could make out was it reved through the range a bit quicker. In theory 350hp would be about 300whp and I don't know anyone one on stock DE cams who has gotten there.

 

i have the hr so i can make it