I am going to get a smaller pulley 3.250 do I need a smaller belt then the one I am using with the 3.4 if so does any one know the part# of the belt? And approx how much boost will she be putting out? Is this safe with my set up?

Thanks in advance.

 

A 3.25 nets 11.5 lbs on a stock 4.8. If that helps for reference. I'm running a K061110 on mine in relation to the stock K061120. Mine had a 3.7 pulley stock (8-8.5 lbs).

 

With my 5.3, headers, stock internals and 3.25 pulley I would see 9 to 9.5 psi boost. I used same belt as supplied with 3.4 and have experienced no slippage.

 

When I ordered my 3.25 pulley to replace my 3.40, on a 5.3, Allen said that the new pulley would mean just under 8.0 boost. I used the same belt as the change in pulley size is minimal.

 

Cool Thanks for the replys.

 

2.9 pulley w/ cam and headers gives 10.5 psi