Our friends at the MidEngineCorvetteForum.com like to talk about “little birdies” who offer up details of America’s Favorite Sports Car and this morning they received several screenshots from an internal GM Parts catalog that brings to light some more info about the engine that will power the upcoming 2025 Corvette ZR1.
Previous to the Corvette Engineering team’s two-week stint at the Nurburgring, there was all kinds of speculation about what engine will be powering American’s next King of the Hill super car. Would it be a V8 with turbos or is it another performance hybrid with the E-Ray’s battery and front drive motor?
We think that most have come around to the belief that the ZR1 is turbocharged, but then that opened the debate as to whether or not the car would feature a flat-plane crank like the Z06’s LT6, or would the team utilize a cross-plane crank which lowers the RPM range but may also offer greater reliability with reduction of the FPC vibrations while being able to add Variable Valve Timing (VVT) and Active Fuel Management (AFM) technology. We have been taking a wait-and-see approach to this debate and now are happy to see a bit more clarification from within GM itself.
The GM Parts Catalog leak over on the MECF shows several different parts numbers and descriptions, and we even have a one of the parts photos included. In addition to the part number and description, there is an “application type” showing which engine these parts are for, and it’s described as “YR 5.5L-(LT7).”
Another screenshot offers up even more details, detailing the LT7 as “ENGINE GAS, 8 CYL, 5.5L, DI, VVT, AFM, SC TURBO, DOHC” which really helps to bring the motor into focus as it includes direct injection, variable valve timing, and active fuel management offered on the dual overhead cam motor. As the LT6 doesn’t offer VVT or AFM, that could be due to the LT7 having the cross-plane crank vs the higher-revving flat-plane crank found in the LT6.
In the final screenshot, the application includes “YR07-67 5.5L LT7 8-SPEED TRANS (M1K) Customer Engine Build Program (PBC),” which appears to reference the Engine Build option code for customers to build their own LT7s. While the Engine Build option was initially talked about with the Z06’s LT6, it never came to pass due to the complexity of the motor and the demands on the Performance Build Center that it would have caused.
In recent months, we know that GM has had an internal debate on whether to bring the ZR1 to market as a 2025 or a 2026, and so far as of now, it’s on track to debut as the 2025 Corvette ZR1. The new LT7 is expected to land with between 800-850 horsepower and we are speculating that the ZR1’s MSRP will be somewhere in the $130s. Corvette enthusiasts should expect to see America’s newest super car revealed sometime early next year.
Source:
MidEngineCorvetteForum.com
Related:
[VIDEO] Has the C8 ZR1’s LT7 Engine Been Confirmed by this Shipping Pallet Holding an LT6?
[VIDEO] The Corvette ZR1s Leave the Nurburgring Without Running a Timed Hot Lap
[SPIED] 2025 Corvette ZR1 Prototype Captured Idling at a Colorado Gas Station
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It would seem that this LT7 cross plane in unturboed state would put out similar horsepower to the LT6. This seems like the better way to go. I really wondered about the work and development to change a flat plane LT6 to a form compatible with turbos. The Z06 is now in a more distinct category by itself and more of a collectors item. Will likely never be a better sounding Corvette than a Z06.
GM… NO AFM. Your engineers can’t design a system with longevity. You have had two decades with the 5.3L and you still can’t get it right. Why would you think you could on the Corvette?
∆ yep
Except this car is going to have 850hp and 700 Torque. Where you Z06 had 430 Torque. On the Top End this ZR1 is going to Wipe The Floor with the Z06. Not that the Z06 isn’t fast but yeah compared to this in a straight line over 70MPH it’ll the Z06 will be left in the Dust. Oh one more Thing 130K Lol. Try 250K Minimum for a ZR1 ZR1 for 130K you have a better chance of seeing Jesus Christ Reincarnated.
$130K sounds too cheap.
$130K LOL! It’ll be $185K and with dealer markup $250K or more! Most will go into personal collections and occassional driven late to their local cars and coffee for maximum attention.
Ha-Ha $130k someone is smoking dope, get serious. You can’t find a Z06 for $130k, and that’s a stripped down version. Start at north of $180k and Stealer markup expect $100k not to be unusual.
That $130K mentioned in the article is the anticipated Chevy base (MSRP) price (not a convertible) with no options. Probably that number is too low, but what you guys are talking about is not the GM base price. Today it doesn’t matter how much it costs because the car hasn’t been officially announced by GM. We’ll find out then.
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