Wednesday, August 4, 2021
News Engineer Explains Why Cadillac CT5-V Blackwing Didn't Get ZR1 V8

Engineer Explains Why Cadillac CT5-V Blackwing Didn’t Get ZR1 V8

Interview sheds light on engine choice

  • No dry sump meant visibility didn’t meet requirements

  • 755 hp on a 305-wide rear tire didn’t help the case


We’ve gotten over the fact that Cadillac decided not to put the Blackwing V8 into the Cadillac CT5-V Blackwing, but have you wondered why the car got the 668 hp supercharged V8 instead of the even more potent 755 hp version sold in the Chevrolet Corvette ZR1? Turns out that there was a vision problem, and it didn’t help that it might have made the car too tough for drivers to tame.

The 2022 Cadillac CT5-V Blackwing should have plenty of thrust from the supercharged 6.2L V8 under its hood, but it’s the same engine as the third-gen CTS-V. The team didn’t want it to be that way, Blackwing Chief Engineer Mirza Grebovic said in a recent interview with Cadillac Society.

“When we initially started working on this project, obviously we were super excited to shove any engine in there and make as much power as possible,” Grebovic said. “But in the end what we have to balance is a driver’s cars.”

The LT5’s engine, as much as the team might have wanted the power, was a non-starter. “So if you put the LT5 in the CT5, we ran into simple issues – you can’t see out of the car,” Grebovic said. “you would have to make it so high that you can’t see outside the car, and we wouldn’t have met regulatory requirements for vision.”

That’s because the ZR1 uses a dry-sump lubrication system which lowers the engine several inches, and it also uses a shaker hood that gives it a bit more space on top. Neither was an option for the CT5, which thanks to different tires won’t manage the same cornering forces as the ZR1.

Grebovic also said that giving the car more power wouldn’t have made it quicker. “We wouldn’t have the right chassis for it,” Grebovic said. “It would have been a powerful car, but it probably wouldn’t be any faster at the track or the quarter-mile, because 305 [rear] tires with that much power would be very tough to manage.”

So the CT5-V Blackwing has as much power as Cadillac’s engineers could put in it. Which should make things interesting once the aftermarket gets hold of it.

 

 

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