Downpipe Installed & Walbro Fuel Pump Supplied

In addition to installing the APS kit as it has on many C6s, Redline will also be doing a custom tune on the E38 computer. On higher horsepower, boosted applications, the ZO6's ECM has proven quite limited when it comes to fueling control with larger injectors (needed to feed these power levels), according to Howard, Redline's proprietor and expert tuner. With a bone stock motor and 6psi, no issues were to be expected. However, with the modified motor and increased boost we could only hope that the higher capacity APS MAF housing would be able to keep up, or a Speed Density tune would most likely be the only alternative. The E38 PCM has a hard limit of 12,200 Hz, which is the max value the MAF can report. Once this value has been exceeded, the MAF is considered to be "pegged" and the PCM does not know how much air is entering the motor. The larger MAF housing slows down the air signal and provides more range as the result. Either way, Howard was happy to make good use of EFILive, which he says is head and shoulders above any other tuning software for tuning the LS7s due to its "Virtual VE Table" and easy to read data logging features. For initial wide-open throttle tuning and testing of the kit, Redline would also be employing its brand new digital Dyno Dynamics DS450 and high-speed wideband O2. Further tuning would be done on the street, where the ZO6 feels most at home. Though the C6 still has a stock driveline save the RAM dual disc clutch, billet slave, and LG Motorsports carbon fiber driveshaft, we had also hoped to get some track times out of this beast-though the 3200-pound coupe would have little chance of hooking.