Back in 2016, the Michigan-based performance powertrain specialists at Katech unveiled their naturally aspirated, 701 horsepower 427 cu. in. V8 engine, which was based on the General Motors LT1 V8 block.
Katech has been slowly developing that package over the last few years and has now turned the wick up on the motor, delivering an 800+ horsepower take on the naturally aspirated 7.0-liter GM LT1 engine and taking the record for naturally-aspirated LT1 engines on an engine dyno.
The company already showed off one key component to its hugely powerful naturally aspirated LT1 V8 engine package in 2016 – the 7.0-liter block. Necessary for making even more power, though, was Katech’s new LTK machined cylinder head, which features larger intake and exhaust valves. The new motor also gets different pistons designed to work with the LTK cylinder head and a Katech high-flow/high-pressure oil pump.
Katech’s engine dyno test showed the latest version of their naturally aspirated LT1 V8 is good for 806 horsepower at around 7,250 RPM and 639 pound-feet of torque at about 6,000 RPM. That’s right – this built LT1 is more powerful than the beastly supercharged 6.2-liter LT5 engine found in the C7 Corvette ZR1 – and there isn’t a supercharger, turbocharger or nitrous bottle in sight.
When Katech first debuted their 701 horsepower LT1 V8 a few years back, it noted that a buyer could buy a C7 Corvette Grand Sport, drop the motor in it, and essentially have a naturally aspirated C7 Corvette Z06 on their hands, except with even more power. So, if you opted for this new, 806 horsepower upgraded version, your custom Katech C7 Corvette would have even more power than the ZR1. Sounds appealing…and also expensive.
Watch Katech bolt this record-breaking engine together and run it on their engine dyno in the video embedded above.