Official: Hennessey boosts McLaren MP4-12C to 704 hp

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Hennessey tunes the McLaren MP4-12C to make 704 horsepower.

The McLaren MP4-12C is the latest project from Hennessey Performance Engineering, and the folks tweaking the British supercar’s twin-turbocharged V8 have given it 704 horsepower through an engine management software upgrade, intercooler upgrade, new stainless steel exhaust system and dual air induction filters.

The software upgrade is the main contributor to the resultant HPE700 MP4-12C’s power boost, raising turbo boost pressure to 23 pounds per square inch from the stock car’s 21 psi to stuff more air – and fuel – into the combustion chambers. The new intercooler, with a water/methanol injection pump fitted downstream before the twin throttle bodies, keeps intake air cool and dense, and the intake and exhaust upgrades help to move air and exhaust into and out of the engine as smoothly as possible. The water/methanol injection, mixed in equal parts, starts its cooling charge at seven psi of boost and reaches full flow by 15 psi, allowing the twin-turbo V8 to produce 704 reliable horsepower.

Hennessey took the stock MP4-12C to the track to perform testing for some baseline numbers, and it was able to pull from 60 miles per hour to 130 mph in 8.15 seconds – quick enough to give a Ferrari 599 GTB Fiorano and Lamborghini Murcielago LP670-4 Superveloce runs for their money. After the Hennessey upgrades were fitted, the HPE700 MP4-12C did the same run a full second quicker. The car can also accelerate from 0-60 mph in 2.8 seconds and do the quarter mile in 10.3 seconds at 137 mph.

Taking jarringly fast supercars down the diabolical path to 700+hp seems to be the norm at Hennessey these days, as evinced by the recent HPE700 Twin Turbo Ferrari 458 – also capable of 0-60 mph in 2.8 seconds – we just hope the apocalypse holds off long enough to squeeze in a comparison test (or at least a drag race).

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Hennessey boosts McLaren MP4-12C to 704 hp originally appeared on Autoblog on Wed, 11 Sep 2013 11:40:00 EST. Please see our terms for use of feeds.

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Official: Hennessey boosts McLaren MP4-12C to 704 hp

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