If i use the stock 2011 6.2 truck crank pulley and the stock
LSA pulley how much boost will i see ? does the cam
make a diff in boost Psi ?

 

How big is the stock LSA pulley? I thought from the factory they made 6-7psi but I could be wrong.

Cam may make some difference in boost, but not much.

 

Sorry,stock LSA pulley is 2.95 I thought stock was around 8.5 psi
I was told our truck crank pulley is smaller than a ZL1 or a CTS-V
LSA 9.1 Dia i read some where.

 

Bump for some help

 

6.2L, tvs1900 rotor set (1.9L), 2.95" blower pulley, and stock truck pulley (7.24"), would be a boost of 5-6psi. With a 10% OD crank pulley it would be 7-8psi.

 

Thanks Atomic. looks like i need that 10% to hit
my 8 psi goal or find a bigger lower, ZL1 or CTS-V

 

you can run a 2.5 upper and it will put you at about 10.5lbs..thats what i run on my setup with longtubes, and an exhaust. also the zl1 and ctsv use the same supercharger(lower)

 

what could happen if i swapped out the bottom crank pulley 7.24 od
to a ZL1 crank pulley 9.1 od. besides everything running faster ?

 

I don't think that pulley will fit without running the zl1 waterpump because of the pulley size on the pump.

 

I'm going to check that out, thanks Atomic
just looked at my truck, your right, won't fit.
not enough room. have to buy a top pulley,
damm new they cost a lot. hope i can find a used one.
What size/od would a top 10% pulley be ?