When I installed my Grovers, I was paranoid about having a leak and the compressor running all night. So I disconnected the power to the compressor and let it sit the rest of the afternoon and all night till the next morning. Later the next morning I hooked up the compressor again and it didn't even try to come on. I sounded the horns just to make sure the compressor was working and all is well.
I thought that the compressor might come on since it was 80F when it filled the tank up the afternoon before and was 40F that next morning, but I don't know how much pressure would fluctuate +/-40F.
I did opt to not using the fittings that came with the kit. I used Parker push lock type brass fittings to allow me easy disconnect and reconnect of the hoses if needed. I use them on every piece of equipment at work and they're very durable.
I was just thinking about what if we could change the pitch or tone of the horns by changing the diaphram spring to one with a different rate? I might try it and see.
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'99 2500HD Quad Cab 4x4, Intense Blue Pearlcoat, Fully loaded w/Agate leather interior, 5-speed, 4. 10 Limited Slip, Skyjacker Leveling kit, Heckethorn Nitro 9000 shocks w/dual End to End steering stabilizers, 35x12. 50x16. 5 BFG/AT KO's on 9. 75x16. 5 Eagle 589 Aluminum Wheels, 9004 Cool Blue's, Silencer Ring removed, Fog Lights relay pulled, No muffler, No resonator, 4" straight pipe, Northwest Customs Stainless Steel Rocker Panels, Steel Horse Stainless Steel Nerf Bars, K&N Filter,Custom POWEREDGE W/HOT Programs 60/80/100+HP, Grover Air Horns, Autometer Ultra-Lite Gauges.