So, I have the Nostalgic air (N.A.P) system for the Y-Block which also includes the bracketry to locate the compressor on the bottom passanger side of the Y-Block, and the 10si GM alternator on the upper passanger side. MY problem is....

I CAN get the 3-wire to charge by self exciting (reving past a certain RPM) it

I CAN get the A/C to blow Cold

But I CAN NOT get them to do both at the same time without the compressor screaming like a banshee

It's as if though the system can't take the extra load? Someone suggested that there might be a power problem and that there's not enough juice to the system, but I find that hard to believe (63 AMP alternator). Has anyone else had this problem or know what it could be.

Facts:

Charges 13.4 Volts unloaded, 12.9 Volts load

It doesn't squeal until it drops under 13 volts

The belt IS tightened

It looks to me that it's screaming because it gets stuck or something

Any suggestions are highly appreciated.

William



1957 Ford Fairlane 500

292 Bored .30 over

Fordomatic