With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

You've probably heard racers talking about leakdown testing as a method of verifying engine condition. Being a hot rodder, you've probably performed a similar function by using a compression tester to ...

Formula 1 bosses are moving towards a rule change that would close a loophole rivals believe Mercedes have exploited in the ...

Formula 1's governing body, the FIA, has announced a resolution to the sport's regulatory row over engine compression ratios, ...

Formula One’s governing body, the FIA, has reached a compromise with power unit manufacturers to tighten how engine ...

FIA announces updated 2026 regulations, including new engine testing after Mercedes PU scrutiny, plus a series of rule tweaks ahead of the season.

A revised test at 130°C aims to end off-season speculation — but could shift the debate into 2027.

The FIA has updated the 2026 F1 engine rules, changing how compression ratios are measured to prevent loopholes.

Some rival teams have suggested Mercedes found a way for components to behave differently when they heat up during use. To address that, the compression ratio will be controlled in both hot and cold c ...