Renault Describes Engine Characteristics of Singapore F1 Circuit
SINGAPORE GRAND PRIX ENGINE FACTS AND FIGURES:
Twenty two of the 23 corners are taken in first to third gear, so for the vast majority of the lap the engine is working at between 8,000rpm and 13,000rpm on the corner exits. The engine maps need to deliver good driveability through the low speed and low rev range as accurate torque response and stability are key. Getting the correct gear ratios in the lower level can also improve grip, and ultimately lap time, in this respect.
The engine is only given a chance to breathe on two short straights, the pit straight and then the curved straight between turns five and seven. In fact seventh gear will only be engaged three times per lap; only Monaco has a lower usage.
The stop-start nature of the track and the short bursts of acceleration between the turns make Singapore one of the least fuel efficient of the season and consumption per kilometre is extremely high compared to the last event at Monza. Getting the fuel load for the start is one of the major challenges of the race as engineers will also have to consider the likelihood of weather changes and safety cars.
While temperatures during the night are typically lower than during the day (between 5 and 6°C cooler), the enclosed nature of the track between the buildings keeps ambient temperature high. Cooling systems are therefore carefully monitored, particularly since the cars are going relatively slowly and often circulating closely to each other, raising the operating temperatures further.
Singapore’s equatorial location gives it a very tropical climate and humidity is often over 90%. The high water content in the air displaces the air being ingested into the engine via the air filter, reducing the amount of oxygen that can be combusted with the fuel. This makes the engine output less powerful so different engine modes will be used to negate the power loss.
The full Renault Sport F1 Singapore GP preview is available on the engine supplier's dedicated page on the right-hand sidebar.