Pro Mod veteran John Scialpi and his supercharged Tri-Five are a force to be reckoned with at the drag strip. We saw firsthand how capable they were at the recent NMCA West Coast Shootout that took place at the Auto Club Speedway in nearby Fontana, California, where Scialpi managed to qualify fourth and take his hot rod all the way to the semifinal eliminations.
The car, however, recently ran into some heat from NMCA officials, who ruled the vehicle’s decibel output of 85+ to be too high for the track, which happens to be located near a tract home community. One-storey walls erected facing the houses diffuse some of the high-octane action, but a strict noise level is still forced upon the racers (in part to keep the city of Fontana from closing down the track once again).
Scialpi wasn’t going to hang up his fire suit over something like this. He sought out the good folks at Flowmaster to improve his car’s sound levels, and was met with a prototype baffled muffler that did a fantastic job of cutting down on the noise pollution.
A test run demonstrated the Flowmaster muffler not only cut the decibel output to legal requirements, but also retained the demanding performance margin needed for Scialpi to keep up with the competition. During one of his passes at Fontana, he was able to pass the finish line at an excellent time of 5.268 seconds, where an average pass comes in at closer to 5.500-5.600 seconds. Not to mention, the sound level was marked at 78 decibels, well below the standards set by NMCA regulations.