I read quite a few horror stories on m.net from people using underdrive pulley on turbocharged cars.
Has anyone here have a first hand experience (good or bad)?
I wanted to get one but from what I read until now it's seems like a bad idea...

 

Well I guess there is not need for this thread anymore...
https://www.miataturbo.net/forum/t20396/

 

Most of the posters on here are also on miata.net, pretty sure it has been covered on here as well, did you try a search?

 

I did and they were a few people supporting that maybe there other contributing factors like the cavitation and aeration that might be responsible for the destruction of the oil pumps... but I better be safe than sorry

 

I have one on my daily that I'll trade you for a 1.8l pulley.

 

rice

 

A turbo will give you way better gains. Do that.

 

...he has a turbo.