Quick Question...

Does my 1990 SC with AC have one sepentine belt, that drives everything including the SC. OR is there a separate belt that is between the SC and idler pulley?

No it has 3, 2 to drive the SC and one for the other accessories. The Crank drives a Jackshaft, which is a step up in speed then the jackshaft drives the supercharger.

Jeff

OH.... what I can now see in the Haynes manual is one belt from the <font color=blue>SC to the Idler pulley</font>, one between the <font color=blue>Crankshaft and the and the idler pulley</font>, and then one that is on the<font color=red> AC compressor, Water Pump, Crankshaft, Power Steering pump, and Alternator.</font> Does that sound right. I can only see one belt that drives the SC though.

What you are calling the idler pulley is what we call the Jackshaft pulley.

So you have it right. One belt to drive the accessories. Another 2 belts to drive the Supercharger. The two drive belts for the SC are made up of the one belt from the crank to the jackshaft, and the other belt from the jackshaft to the sc.

3 belts, 3 tensioner pulleys.

Ahh.... Thanks guys!!