Aftermarket Radiator & Electric Fans

[SCOTI]

Originally Posted by hatzie

With the larger than stock fan you are moving enough air through the stack at idle and sedate cruising but the compressor cuts out when you get in it. Over 30mph the fan is not moving more air than the road speed is pushing through the stack.

At WOT the ECM on a TBI engine should kill the AC compressor til you back off the go pedal. Not sure if all of them do. It gives you a temporary HP boost for passing etc. My 76 has a WOT compressor kill switch on the 6.5L diesel. I installed it on purpose.

If this is not a WOT kill switch... you are describing an overcharged AC system or a failed or incorrectly sized HPCO switch.

This rings a bell. Are the HPCO switches adjustable? I seem to recall reading some info on something being adjustable.