The Cold War

The latest go-faster tweak in the British Hillclimb paddock seems to be a direct result of the sheer quantity of forced-induction cars being used on the hills these days, and the horsepower battle that exists between them.

Simon Moyse Gould GR59

Brian Moyse distributes the ice in the Harewood paddock


One way of generating maximum horse power from a turbo or super-charged engine is to run with the lowest possible inlet temperature, this is the temperature of the air used to create the air/fuel mixture.

A leading 2-litre contender, running with a super-charged Suzuki Hayabusa engine, has been spotted adding carbon dioxide (otherwise known as dry ice) to the sidepod which contains the blower’s intercooler in order to cool the system as much as possible.

Brian & Simon Moyse used this set up in their Gould GR59 at the recent events at Shelsley Walsh and Harewood, and have seen great results with the charge temperature being in negative degrees C when leaving the start line.

We have heard of a driver trying this type of thing before on the hills though… One top 10 contender, who will remain nameless as long as he buys Mr Editor a pint when we see him next, has been known to fill his NORMALLY ASPIRATED engine’s airbox with dry ice in an attempt to reduce inlet temperature. Funnily enough, it also removed most of the oxygen from the airbox and the engine didn’t run!

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