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156 Posts
I have been reading all the post both here and on cobalss.net about changing the pulley on the S/C.
So far this is what I have figured out:
1. There is a solenoid that only allows the S/C to make 12 or so PSI.
2. Adding a pulley causes more heat. (is this heat just underhood temps, or is it the temp of the motor that needs to be adressed by a new thermostat or cooling system upgrades).
3. In order to fully benefit from a new pulley, one needs to get an intake, header, exhaust first.
4. There is POSSIBLY another way that the PCM controls the boost that the S/C put out. <---- I am not quite sure about this but it seams that everyone agrees!
What i havent figured out......
1. How much boost can the S/C effeciently make? (MAX PSI)
2. How much boost can be made before engine internals need to be strengthened.
3. The WHOLE heat issue really throws me for a loop!!!!!!!!
If there is any ABSOLUTE FACTS i am missing...please fill in. If any one has DEFINITE answers to these questions....please let me know. I know I am not and engineer and dont know a whole lot about F/I engines. I want to change my pulley b/c there is no doubt that this gives more power, i just want to do it right the first time without FUC$#@! my engine!!!! Thanks for any help pn clearing up these issues.

So far this is what I have figured out:
1. There is a solenoid that only allows the S/C to make 12 or so PSI.
2. Adding a pulley causes more heat. (is this heat just underhood temps, or is it the temp of the motor that needs to be adressed by a new thermostat or cooling system upgrades).
3. In order to fully benefit from a new pulley, one needs to get an intake, header, exhaust first.
4. There is POSSIBLY another way that the PCM controls the boost that the S/C put out. <---- I am not quite sure about this but it seams that everyone agrees!
What i havent figured out......
1. How much boost can the S/C effeciently make? (MAX PSI)
2. How much boost can be made before engine internals need to be strengthened.
3. The WHOLE heat issue really throws me for a loop!!!!!!!!
If there is any ABSOLUTE FACTS i am missing...please fill in. If any one has DEFINITE answers to these questions....please let me know. I know I am not and engineer and dont know a whole lot about F/I engines. I want to change my pulley b/c there is no doubt that this gives more power, i just want to do it right the first time without FUC$#@! my engine!!!! Thanks for any help pn clearing up these issues.