I think i remember reading somewhere that you cant use UR pullies with a vortech kit because the crank pulley isnt the same size as stock. If this is true would it be worthwhile to get the other two pullies in the kit?

Thanks!

 

Your boost will change, as the linear fashion of boost control is detrimental and directly relational to pulley size.

 

You would need a high boost pulley to get back to stock numbers (Smaller diameter SC pulley) Something like a 12psi pulley would be needed to get 8-9psi of actual boost.

 

ASP makes a lightweight pulley (aluminum) that is the same diameter as the stock pulley so it will NOT underdrive the SC. I believe that they retail for around $130 just for the crank pulley. You can get them anodized any color you want too.

 

You could just give me your old pulley.

See you Friday.

 

Any idea where to get that?

Thanks

 

I think the company is actually called KJR, looked them up with the search.


Oh, and see you Friday Taurran!

 

Our company is KJR Performance
www.kjrperformance.com 170 shipped to anywhere in the USA otherwise we will quote you on a shipped price

 

sorry for the hijack, but how much would be an ave charge for the instillation of a kjr pulley?

 

local shops in my area do it for around 50-60 bucks. They usually charge for a half or full hour of labor.

 

http://www.aspracing.com

They do not stock them so it can take 3-4 weeks to get them. They will anodize it any color you want.

 

thank you for the info. now the prob is, does anybody know a local shop around the la/walnut area??

 

What would be the benefits of having a lighter stock sized pulley? Would it just make the car rev faster, or actually produce some sort of decent gain (more than 10rwhp). WOuld this in any way make it easier for the car to spin the sc and therefore reduce loss of power through all the pulleys. thanks

 

+1

 

Why not just get a higher boost Vortech pulley? They make a 2.56 (or something like that) pulley, it seems like it would be easier than switching a crank pulley.

 

changing the vortech pulley will make the SC work harder. A crank pulley frees up power rather than making more so you work the car at the same rate but get more power out of the motor.

 

Jonathan- I have been contemplating converting all of the pullies to 8 rib rather than the stock 6. Do you think that this would be worth the effort and expense? I am hoping that a wider belt will be less prone to stretching. It seems like I am always having to tighten the SC belt.

 

I would assume the boost issue only relates to the smaller size crank pulley correct? We can still change out the water pump, alt pullies without having effect on the supercharger?

 

I didn't want to change the boost on the sc, but rather reduce the amount of power that is lost through all the pulleys. Am I assuming right that the kjr would help with that.

 

I was interested in the kjr pulley but thought the lighter crank pulley would mean it would rev even quicker and thus exasperate belt dust, slippage, stretch, wear...

Yes? No?