Vehicles used: 04 Ram 1500 Quad Cab SLT 4wd with the HEMI VERSUS an 04 Ram 1500 Regular Cab ST 4wd with the 4.7L....................Conditions were 60 degrees, 63% humidity, and Barometer was 30.05
Reaction time for both were 0.494; 60' HEMI=2.331 // 4.7L=2.404; 330' HEMI=6.609 // 4.7L=7.003; 1/8 HEMI=10.224 @ 68.35mph // 4.7L=10.938 @ 62.53mph; 1000' HEMI=13.308 //4.7L=14.339; AND FINALLY THE 1/4 MILE TIME: HEMI=15.966 @ 83.76mph // 4.7L=17.251 @ 76.83mph.....................So that's the real deal right there!!!!

How about that train horn? Did you install a compressor or do you just have a supply tank that you use it with?

I installed a compressor, switch for that; also installed a 3-gallon air tank, and an air gauge to tell me the psi in the tank, and ran 3/8" air line to the horn, which is wired to a momentary switch.