Wally39

When I went to the 3.4 pulley, my boost would go 9 to 10 lbs. Now it seems to only swing to 8lbs. Is it the quality of the air being sucked in or maybe the new K&N filter I just put on restricting?

Screamin Yellow 06

I have the same set up and typically see 8 psi under normal semi heavy foot driving. I don't make full boost (around 9.5psi on an autometer cobalt boost gauge) unless I'mm really screamin' around 6K rpms. This is pretty normal/typical.

Of course here in SC it's starting to get warmed and more humid and that also plays a roll in lower boost numbers. The s/c love that cooler air.

cheftjpeck

+1
down here in Fla I was getting regularly 8.5 lbs of boost betwen 4-6k..now with warmer weather it is 7lbs avg....througout

larbec7

What does it do for you by chanfing out the pulleys? Do you get more horsepower???

Thanks, new to this stuff

hotairgypsy

shorter fuse for the time bomb!! yes it generates my HP and TQ

larbec7

where do you find them? Do you have a link for a 2006 GT? Are they easy to install?

shooter23

you know they are talking about the supercharger pullies right??

If you have a supercharger...you can get the smaller pullies from whichever manufacturer supercharger you have...

They all make the smaller pullies to allow the supercharger to spin faster, thus creating more boost...

07SCGT

The smaller the pulley the more HP/TQ you will receive, also the harder/shorter the life of the SC. 1lb of boost equates to roughly 15HP gain. So on a 3.4 pulley (8-9 PSI) you will see about a120HP boost, provided you have a good tune of course,(IE properly Mapped AIR/Fule ratio, correct injector size to handle the fuel supply...etc.) One more thing is the intercooler temp, the lower the temp the less parasitic loss your S/C sees, the higher the temp the less affective it is, and you might only generate around 70-80HP on the same pulley. Anything under 150 degrees is like candy to our intakes. Here in AZ, I only get that in the morning or late at night in the summer months.