for a classic, any real gain in fitting them ?

http://www.ebay.co.uk/itm/Subaru-Imp...d1lf-6P6xVb5kQ

says goes from 2kgs of standard down to 440 grammes for this one, a nightmare job waiting to happen just for no gain or worth doing ?

cheers

 

Ive fitted one purely for show and as the engine is already out it was no drama. i dont think there is any gain to be had but at a competive level combined with lighter flywheel etc then every little helps.

The one u listed is smaller then oe , If you are to get one I would get one of the same size and from a reputable company too as a poorly balanced unit could have a negative effect on the engine.

 

Ati damper if u want a quality one

 

I fitted one years ago on the sti, with no issue,
Any rotating mass you remove has to help the engine rev more freely.

 

^^ this.

Or at least read up on why quality damped pulleys are a good idea.
Take a look at this discussion https://www.scoobynet.com/scoobynet-...th-having.html

 

I'd like to got an ati one but st like £250 it's a no no

I've not heard bad stories about the cheap pulleys, granted they may not offer full benefit of light pulleys but at more than half a weight saving they should be better than stock ?

 

And Torsional Vibration?

 

Hmm , I'm not clued up enough in physics so maybe will leave stock one on .

Cheers