While many (including GMHTP) anxiously wait for the 2014 Corvette Stingray to be released, several tuners have jumped into the Gen V game by getting their hands on the 2014 Silverado and Sierra, which sports the same E92 controller as the C7’s LT1 to command the 5.3L L83. It should be no surprise that Lingenfelter Performance Engineering is not only among them, but way ahead of the game. We can’t wait to share what LPE has in store for its in-house 2014 Silverado 1500 and the C7, but in the mean time let’s take a look at this baseline testing.
Using 93-octane pump gas (9% ethanol), the 5.3L belted out 307hp at 5200rpm and 332 lb-ft of torque at 4200rpm on LPE’s Dynojet 248 through the factory 6L80E transmission. This was good enough for 7.5-second 0 to 60mph times, and 15.94 at 90.7mph in the quarter-mile. Not bad for a 5,340-pound pig. That’s over a full second and 4mph faster than LPE’s 2010 Silverado 5.3L, which also had more rear end gear (3.42 vs. 3.08:1).
Taking advantage of the ’14 model’s Flex Fuel capabilities, LPE dumped in some E85 and repeated its tests. The on-board sensor read 65% ethanol content, with 1/8 tank of E10 diluting the mixture, when the dyno read 321hp and 355 lb-ft of torque. This certainly seems in line with GM’s 380hp crank horsepower rating when using E85 (355hp on gasoline) as well as the subsequent acceleration tests. The 0 to 60 dropped to 6.96-seconds and the 1/4-mile time was nearly a half-second improvement (15.51 at 93.5mph). LPE recorded an average of 18.9-degrees of timing (up from 17.2 on gasoline), and a reduction in intake air temperature (7-degrees average) and engine coolant temperature (3-degrees average).