Cadillac | CTS-V : July 18, 2020
For most of us, a 900whp V3 CTS-V is definitely near the top of the list of dream daily drivers. And not one to dream without taking action, Jeff decided to bring us his 2017 Cadillac CTS-V to make that dream a reality!
Up first in the shop, Alex disassembled the LT4 to the short block and reassembled with a camshaft from Weapon X Motorsports, phase limiter from COMP Cams, valve spring set from PAC Racing Springs, rocker arm bronze bushing trunnion upgrade from Smith Brothers Pushrods, pushrods from COMP Cams, DOD delete plugs from Cam Motion, 2110 Dog Bone Style lifters from Johnson Lifters, CNC ported cylinder heads from Katech, LTR7IX-11 spark plugs from NGK Spark Plugs, custom fabricated ignition coil relocation plates with MSD Performance spark plug wires wrapped in Protect-a-Boots from Design Engineering, Inc., cylinder head studs from ARP, a W175AX 2.9L twin-screw system from Whipple Superchargers, a harmonic balancer and lower pulley setup from Weapon X Motorsports, 103mm throttle body from Nick Williams Performance, SuperFlow carbon fiber 5.00″ air-intake system from Weapon X Motorsports, 2.00" primary ID long-tube headers from Kooks Headers and Exhaust connecting to the OEM exhaust system, SPI (Secondary Port Injection) system from Weapon X Motorsports, auxiliary fuel pump and Flex Fuel conversion from DSX Tuning, Boost Chiller setup from Weapon X Motorsports to keep output consistent even in the southeast summer heat, along with all the OEM GM odds and ends to bring it all together and eliminate DOD/AFM.
With the mechanical work wrapped in the shop, Matt strapped her down to the rollers for Vlad to perform a custom Flex Fuel calibration via HP Tuners. With the Whipple 2.9L delivering ~16psi, Vlad dialed in 93 octane first coming in at a strong 794.26whp & 737.38lbft. Then with E85 in the tank, the LT4’s output jumped to a repeatable 880.01whp & 832.93lbft, with a best run of 901.07whp & 841.68lbft! Plenty more jam in the jar with additional boost pressure, but for now, Jeff's going to have a blast with the extra 330whp. Stay tuned for more to come from this badass V3 in the future!