Pound-for-pound, the C6 Corvette Grand Sport truly is a fantastic platform to build from — all of the great equipment from the base C6, along with Z06-size widebody, Z06-size brakes, upgraded suspension, dry-sump oil system for manual transmission models, etc. While it’s undoubtedly a killer package, it’s missing just one small thing… you guessed it: BOOST!
And that’s what Sam brought us his 100% stock 2013 Chevrolet Corvette Grand Sport to address! Up first, Matt strapped her down for some baseline runs, then she went into the shop where Andrew set the LS3 engine up with a Heartbeat TVS2300 supercharger system from Magnuson Superchargers, along with Lingenfelter Performance Engineering subframe spacers, and to finish up, she went back to the rollers to get dialed in by Vlad via HP Tuners.
The results? 510.51whp & 458.91lbft at ~6.5psi on 93 octane! That’s a gain of 126.90whp & 77.33lbft over the baseline of 383.61whp & 381.58lbft. Solid results considering the rest of the car is 100% stock — just some exhaust work and a bit more boost away from ZR1 power output!