Hennessey Is Planning Something For The McLaren 720S

Hennessey Is Planning Something For The McLaren 720S

Hennessey is up to something, and it centers around the almighty McLaren 720S.

Recently, Hennessey Performance got their hands on the McLaren 600LT and decided to do what they do best, and that is give it more power. They turned the fun little supercar into a 1,000 hp monster that could take on vehicles that it would never have dreamed of racing before.

And now it seems that Hennessey wants to do the same thing for the range-topping McLaren 720S.

Which seems a little weird. The car already has 710 hp thanks to a 4.0-L twin-turbo V8 engine and can do zero to sixty in just 2.7 seconds. It comes with an ECU with launch control and a quick-shifting 7-speed dual-clutch transmission, straight-out-the-back exhaust, and an active rear wing. And everything is made out of carbon fiber so that it only weighs 3,180 lbs.

What we’re saying is that there’s very little to improve on here, and that the 720S can already defeat most other supercars in a straight-up race. Guess that doesn’t really matter to Hennessey.

Here we see a 720S on the dynojet getting tested for some future modifications. We know that because the video description reads: "Putting down 675 rear wheel HP in its stock form, this McLaren 720S is ready for HPE modifications in pursuit of more power."


By the way, 675 rear-wheel hp represents a power loss of just 5% to the transmission. That’s extremely efficient considering most cars lose anywhere from 10-20%. Hennessey vehicles sometimes get as high as 25%.

It seems almost a shame to ruin that near-perfect efficiency with bigger turbochargers or stainless steel headers, or whatever else Hennessey plans to shove under the engine cover.

The 600LT upgrades can give us a likely preview of just what to expect from Hennessey’s upgrades. Intercooler, air filter, and upgrades to the twin-turbos seem almost certain, as is a power rating that tops 1,000 horses. After all, the 720S is already so close that you might as well, right?

We’ll keep you up to date as we learn more of Hennessey’s plans.

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