Have you ever overheard someone say: “My car is fast enough”. This could be a symptom of mental illness because the only humans ever satisfied with the performance of their machines are the pilots of the SR-71 Blackbird. I’ve had a few spins in McLaren‘s latest Super Series, and it doesn’t disappoint. But after the new wears off, your answer can be found west of Houston. That’s because the Hennessey McLaren 720S HPE900 Sounds ready for a fight.
Something is different about the 4.0L V8 found in the Senna and the 720S. It either has a different firing order or maybe a flat-plane crankshaft. Either way, it’s too quiet in factory form. So the team at Hennessey Performance started with high-flow intakes. These feed into modified turbos and then into larger intercoolers. More boost means more power, and a less-restrictive exhaust allows for instant response.
The secret sauce lies in the tuning. After extensive evaluation, John probably optimized the ignition curve and eliminated the silly boost-by-gear programming. The end result is 809 horsepower at the rear wheels along with 627 lb-ft of torque. That is a gain of 133 horsepower at the ground, not too shabby considering it includes a 3-year warranty and an aggressive soundtrack. Don’t be shamed by a Senna, click the link below for all the info.