GM discontinues its 755-hp LT5 engine

Well, we couldn’t believe the news a few months ago when it was announced that Chevrolet’s supercharged LT5 would be discontinued after a year of production, but it appears to be true. LT5 has been officially discontinued. It was GM’s most powerful engine, and in the midst of a horsepower war between the Big Three, hitting such a capable 755-horsepower/715-lb-ft performer seemed odd.

We think one-and-done is a good phrase for the LT5, as it was just stuffed into the crazy, record-breaking 2019 ZR1 Corvette. The ’19 ZR1 fielded the LT5, and Chevrolet wanted to make that car so bad it built it, though the taller LT5 blower (compared to the LT4) meant it couldn’t be sold in Europe. We imagine that the LT5 was quite expensive to develop, and was installed in less than 3,000 vehicles.

But while the 2019 ZR1 Corvette was cool, we’re here to talk about the demise of Chevrolet’s most powerful crate engine. With the shutdown of production, most of the existing LT5s are gone from dealership inventories. You can still find them, so if you have around $19,000 and want one for your hot rod swap project, you better get busy, as we’re pretty sure the price is only as much as the rest. The supply goes down.

How does it matter NSBetween LT5 and LT4 Ido I have

Think of the LT5 as the bigger brother of the LT4, with most of the changes taking place in the blower area. The LT5’s supercharger grew from the LT4’s 1.7-liter to a newly developed R2650 Twin Vortisys 2.65-liter supercharger, largely designed by GM’s small-block group working with Eaton’s engineers. The LT5’s four-lobe compressor rotors are larger and longer in diameter, with a 170-degree helical twist than the LT4’s 160-degree-twist rotors. The LT5 delivers a boost of 14 pounds per square inch, compared to the LT4’s 9.4 psi. The passenger-side rotor is driven by a crankshaft pulley via an 11-rib belt (three ribs higher than the LT4), which has a pulley ratio of 2.4 to 1 for 15,860 rpm, compared to the LT4’s ratio of 3.1 to 1. All changes were good for 105 horsepower and 65 lb-ft more torque than the LT4.

Will LT5 used In the C8 Corvette?

While discontinuing the LT5 after such a small amount of production doesn’t make a lot of financial sense, we can’t really see GM filling in the C8 mid-engine Corvette as GM continues to move towards turbo and technologies. . Like the flat-plane-crank engine for the Corvette. This would mean that the C8’s naturally aspirated LT2 would be the only pushrod mill to power a Corvette, with future Corvettes getting power from the new engine designs, not the LT5.

What is Chevrolet’s most powerful car selling?

The death of the LT5 makes the 650-horsepower LT4 the big stick in GM’s arsenal, and with that, the ZL1 Camaro is GM’s only offering, making over 600 horsepower for now. We were really hoping for an LT5-powered Z/28 sixth-gen Camaro, but with Camaro production shutting down in a few years, we feel like Chevrolet didn’t want to put the necessary effort into stuffing the LT5 into the Camaro, which It’s a shame to cry. We can only hope that GM has some new big power mills in the works, but we’ll have to wait to find out.

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