Rumor has it that the V8 engine being developed to power the forthcoming Chevrolet Corvette ZR1 (C7) will be called “LT5”, partly because it’s one digit greater than the supercharged LT4 that powers the current Z06, and partly as a nod to the Lotus-engineered DOHC LT5 V8 that powered the original ZR-1 from 1990 through 1995.
More likely than not, that rumor will turn out to be true; new photographic evidence from dealer Rick “Corvette” Conti appeared this morning, showing a closeup of an engine cover with “Corvette LT5” stamped into it. And no, it doesn’t look like anything that was on the original LT5 on the C4 ZR-1.
Specifics regarding the forthcoming LT5 engine are still shrouded in mystery, with some rumors maintaining it’ll be a higher-output, supercharged pushrod V8 like the LT4, and others claiming it will be a brand-new dual-overhead-cam V8 like the LT5 of yesteryear. The first possibility is supported by the results of an RPO code search, claims Weapon X Motorsports, while the latter is based on some supposedly leaked internal documents from General Motors.
A dual-cam V8 with four valves per cylinder would be a more modern, sophisticated powerplant – characteristics that befit the ZR1 name. But on the other hand, another supercharged, cam-in-block engine with some tweaks and a bump in power would be the easier route. Your guess is as good as ours.