If I am not mistaken at WOT the AC compressor cuts off. That would explain the 3HP likely being the smog pump alone. The AC would take about 20HP but nothing at WOT. I think
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C ME FLY
88 Notch
MAC headers, H-pipe, and Chrome 2.5" pipes, pullies, K&N filter, BM shifter, 17" ROH ZR6, Dropped 1.5".