If you’re in the market for a C8 Chevrolet Corvette, your two displacement options are the naturally aspirated 6.2-liter LT2 V8 that can churn out 495 horsepower in the Stingray or a naturally aspirated 5.5-liter LT6 V8 in the high-revving Z06. Let’s not forget the LT7 variant that adds two turbochargers to the 5.5-liter small block for 1,064 horsepower in the ZR1.
Five generations of General Motors’ heralded small-block V8 have been turning wheels since 1955, the most recent arriving in 2014.
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Next Small Block To Break Cover
Eleven years later, a sixth-generation small-block is about to break cover. General Motors announced two years ago a $500 million investment to produce the new V8 at its plant in Flint, Michigan, and earlier this year came word of an $888 million spend at the plant in Tonawanda, New York, to make the engine for full-size SUVs and pickups.
Most of the workhorse LT2 Corvette engines come from Tonawanda, while the high-output jobs are hand-built at the Performance Build Center at the vehicle assembly complex in Bowling Green, Kentucky.
5.7 Liters, 6.6 Liters, 6.7 Liters?
General Motors isn’t ready to spill all the details just yet, but Corvette Blogger reports the sixth-gen small-block will displace 6.7 liters. GM Authority recently reported the V8 would be offered in both 5.7-liter and 6.6-liter configurations.
Corvette Blogger found its information about the new small-block in the GM Parts Book, which is used by GM technicians for diagnostics and service procedures — and has become a good source of GM product news before official announcements are made.
Both Direct AND Port Injection
Corvette Blogger reports the listing reads: “LS6: ENGINE GAS, 8 CYL, 6.7L, DI, PFI, OHV, ALUM, GEN 6,” suggesting the all-aluminum engine uses both direct fuel injection and port fuel injection and the overhead-valve pushrod architecture that has been the small-block hallmark in more than 113 million engines produced since 1955.
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Reviving LS6 Name
GM Authority reports this new “LS6” engine is likely to power the 2027 Corvette Grand Sport. The LS6 was an engine designation used 20 years ago for a 5.7-liter small-block V8 in the Corvette Z06 and Cadillac CTS-V.
For now, we wait for more details about the next small-block V8, grateful that automakers are still developing clean-sheet internal-combustion engines.
Source: GM Authority, Corvette Blogger