Here’s how heat affects the dynamics of your car

If it’s hot out, your car will accelerate much slower

Here's how heat affects the dynamics of your car

Over time, cars lose power, and with it goes the dynamics of dispersal. No matter how many seconds was recorded in the passport of the vehicle on the day of release of the machine from the conveyor, after 10 to 20 years can safely add a couple of seconds (if the car drove in the tail and mane). Similar metamorphoses in practice, experience for yourself YouTube-blogger, part-time fan of Mercedes-Benz models AMG, Alex leading channel “LegitStreetCars”. However, as it turned out, the technical condition of the car is not quite “in the business”.


Analysis of one of the video channel Alex: How much is losing power the car with high mileage


Recently, during the competition, the blogger noticed that his old a loaded car C43 AMG lost a few races the car, which he definitely wasn’t supposed to lose. Comparing the results of measuring the dynamics from 0 to 100 km/h, the owner has determined that the Mercedes accelerates for a couple of seconds slower than the stated 19 years ago. Against this background, the decision was made worthy of Hercule Poirot to find a missing “horses”. The cause has been found and you will be surprised how it was original!


As it turned out, the cause of the power loss was… the temperature of the ambient air and the absence of two small pipes under the hood. During the races the temperature in the sun was too high, plus the car was missing a few seemingly minor details, together they just killed the performance of the motor. The combustion process requires fuel cool fuel air rich in oxygen. The lower the temperature, the higher the density of oxygen molecules.


Because of the heat, C43 AMG when acceleration to 100 km/h could not even get out of 8.5 seconds, although according to the manufacturer should be slightly more than 6 seconds.

Here's how heat affects the dynamics of your car

Before you install the real cause of the power loss was carried out the standard scheme of inspection of Mercedes: measurement of compression in all eight cylinders, check fuel system operation. In the end, the blogger thought it would be nice to have so-called Cold Air Intake (Cold air intakes) that the previous owner for some reason dismantled.


Initially, this AMG came with two tubes going to the “nostrils” of the front grille, which was filed more cool outside air into the air filter low resistance. Without these plastic tubes the engine was sucking in pre-heated engine compartment air. This fact is worth one second if you set the speed from 0 to 100 km/h. Stop! But where even one second?

It just came in the temperature correction of the environment. An additional experiment was carried out in the early morning, when the sun had not yet warmed the air. The experience was a success. Perhaps the result is a little gleaning to be perfect, but because the conditions of measurements in normal life are far from those in which the tested prototypes. Humidity, temperature, road surface, wind speed, tires and so on and so forth. The automaker is interested to show the product “face”.


In life such perfect conditions to achieve will be very difficult. Should match a lot of factors. But if the car really lost throttle response, check if tubes of the intakes and not too hot outside. Maybe it’s time for Siesta?