McLaren’s current range-topper will see a significant bump in power thanks to the mad US-tuner

Not too long ago we saw the McLaren 600LT get the Hennessey treatment, with power upgrade packages ranging from 521kW to a staggering 745kW. You’d think that’d be enough to give the tuner’s power hungry technicians their fix, but now they’ve gone even further…

Hennessey is planning to introduce two packages for the limited-run McLaren hypercar, named HPE900 and HPE1000. Final power figures are yet to be confirmed, but based on what we saw with the 600LT, 670kW and 750kW power figures are likely to be options.

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Taking the most powerful combustion-only McLaren to new heights requires quite considerable modification – it’s no simple ECU tune job. For the lesser HPE900 package, the factory 588kW 4.0-litre turbocharged V8 will see the addition of high-flow air filters, a new stainless steel exhaust, fettled factory turbochargers, an intercooler system upgrade and an ECU tune to match.

The HPE1000 package requires even more kit, with an entirely new engine management system from Motec, new stainless steel turbo headers, new twin turbo chargers, gearbox reinforcement as well as everything in the HPE900 package.

Performance figures with the upgrades are yet to be quoted, but with such increases in power, the model will no doubt be a little keener to move down the road. At this power level, acceleration from standstill is as much down to the capabilities of your tyres as it is the amount of power you have so 0-100kmh is likely to come only slightly quicker than the factory 2.8sec time. 0-3000kmh should be much improved, though, with the standard car already covering the sprint in just 18.5secs. Though limited by the model’s extreme aero, the factory 340kmh top speed will probably see an improvement.