i seem few reviews that the Unorthodox Pulley are prob the best for the Z.. If im just looking for the HP win do i really need the radiator and the idler pulley??? I mean for HP gain i just the under drive crank pulley correct?

 

Nope.. I just run there Stock size crank pulley.

 

U mean buy unorthodox stock size crank pulley. And keep my radiator and idler stock oem pulleys???

 

sure why not..change them all.

 

OEM crank pully and Unorthodox crank pully in red

 

if im daily driver is better to stay with stock size pulleys to avoid power loss.. So get get faster acceleration i would just need to buy the crack pulley.. Is there any reason why i would need the radiator and water pump pulley??

 

Yepp.. the other two are just Bing. Just get a Stick size.
Part ID: 021011512

Example for 06:
http://www.unorthodoxracing.com/Item...ake=30&Model=9

 

thank u

 

it looks nice to have them all three changed, but the only one that really "matters" is the crank, dont go under drive either. I think AMS has a NICE 3 set lightweight sold at z 1 motorsports dot com

 

Interested in a crank pulley as well, but what about crank torsion, and the later effects of going to a light weight pulley over a stock pulley?

 

I also have question about the pulley set, what is the big performance different between the Unorthodox stock size pulleys set and Unorthodox pulleys set with smaller size? I see some forum said pulley will wear out the engine, is that because the smaller size? Is this set good upgrade?

I really want to know more about this one, this will be my next upgrade. Thanks guys.

 

Dont go underdrive, only stock size crank pulley ..

 

Any reason for the choice the stock size pulley?

 

Light weighted stock size pulleys are better, if you go underdriven you have to change 2 more pulleys and belts

 

I am thinking about to change all three of the pulley, so what do you think?

 

Most of the power gain comes from the lightweight aspect of the pulley, not the underdrive. So you don't have to change belts and deal with the underdrive effect on accessories, most people prefer to just get the OEM sized crank pulley.

 

Here's my experience: I had the smaller unorthodox pulley(red) with my stock internals and TT/N20 with not one problem. Car definitely went thru RPMS quicker.

When I went with a built motor, went back to the OEM pulley(the other one in the pic) and no problems to date.

 

You don't have to change 2 more pulleys because you go underdriven, just 2 belts.