the LS9 was rated at 638 horsepower and 604 lb-ft of torque. Like GM's LSA V8, the LS9 engine was derived from the LS3. They share the aluminum engine block and rectangular port cylinder heads.

Their reliability and potential for massive horsepower make the LS engine swap a popular option for gearheads. However, the LSA and LS9 variants' high cost and large size put them on the lower end ...

“There’s probably another 25 horsepower in it with a larger, 100mm throttle body and the same tune,” he says. Of course, we can’t discuss a 1,000hp/1,000-lb-ft, LS9-blown engine without ...

It's not every day you get to hand-build a 638 HP LS9 engine that'll slip under the hood of a Corvette ZR1. Yesterday was one of those days. Here's how the magic is made. Yesterday we drove over ...

GM Executive Vice President Tom Stephens says GM will continue to press forward on all technology fronts, including hybrids, alternative fuels, and plug-in electrics. "If you know the history of ...

Fuel economy testing has not been completed, but engineers are confident the ZR1 will be the most fuel-efficient 600-plus-horsepower car on the market. The LS9 engine is hand-built by specially ...

We likely don't have to tell you the details of the Corvette ZR1's LS9 engine, but just in case, it's a 6.2-liter (376ci) mill that's force-fed by a 2.3-liter Roots-type supercharger using Eaton's ...

According to GM, the LS9 has now been SAE Certified at 638 hp and 604 lb-ft of twist. The official EPA fuel economy testing hasn’t been finished and for people who buy a ZR1 it probably won’t ...

Chevrolet LS9 Long Block V8 Engine – 638 Horsepower Chevrolet offers a range of crate engines including Corvette engines like the LT4 and LS9, but it's the latter we're spotlighting here.

With the C6 ZR1, a new threshold of factory performance was achieved with its supercharged LS9 engine. Rated at 638 horsepower, it was the highest-output engine in a regular-production Corvette ...

But even compared to the 638-hp LS9 engine that powered the 2009 sixth-generation ZR1, the new 755-hp LT5 in the 2019 ZR1 is a big leap forward in power, torque and efficiency. Under that shaker ...