Now that East Coast Supercharging has equipped Project LS1 with the Procharger P-1SC-1, an ATI balancer from Thunder Racing, and all of the relocated stock equipment, it was time to wrap things up. The standard 3.5-inch twin high-flow intercoolers were included in the kit as was a Diablo Sport tuner; however, Procharger had just finished developing a 4.5-inch intercooler upgrade that we were dying to get our grubby little hands on. We tested the kit as-is, then installed the new intercoolers and a custom tune from East Coast Supercharging into our Trans Am to see how much more power was to be had.
However, a simple track and dyno test wouldn't be sufficient this go around. The only thing we like at GMHTP more than $10 hookers and huffing Krylon is heavy tech (Editor's Note: the views expressed by Scott Parker do necessarily reflect those of the GM High-Tech Performance staff), and Procharger was happy to accommodate us (with the tech that is). President Dan Jones of ATI Procharger shipped us not only a bunch of testing equipment, but one of his engineers, too. With the help of Product Development Engineer Ryan Bosch and his testing equipment, we could compare the intake air temperature and pressure drop from the 3.5 and 4.5-inch intercoolers.
Before testing, there were still a few loose ends that needed to be tied up. The intercoolers needed to be bolted up with the plumbing connecting it to the blower and the airbox. In order to match the enormous increase in airflow, the stock 26-pound injectors would need to be upgraded to the 38-pound units supplied in the kit along with a new in-line fuel pump. The spark plugs would need to be taken two steps colder, so ECS supplied us with a set of NGK TR6s.Follow along for the remainder of our LS1 Procharger install and testing at the East Coast Supercharging facilities in Cream Ridge, New Jersey. As mentioned in Part I, this will be Project LS1's swan song, and we had every intention of taking one last trip down the 1320 without performing a coup de grace on the stock 10-bolt. So for the final drag test we returned to our home away from home Englishtown Raceway Park for a few hits on the Mickey Thompson drag radials.