Hot Blooded …. Summer Heat and Nascar

In Charlotte, Greg Biffle’s driver cooling system failed. It didn’t fail mid race. It failed from the pace laps. Instead of blowing cooler air, it was blowing straight hot air. Biffle stated, “It was literally burning the side of my head.” It was estimated by his crew chief Greg Irwin that the temperature of the air he was breathing was upwards of 120 degrees. “He actually was running with his visor open so it was a little cooler than ambient temperature of the car.”

[media-credit name=”Brad Keppel” align=”alignright” width=”238″][/media-credit]Robin Pemberton, director of competition for NASCAR said, “The ambient temperature in the car on race day is in the mid 100’s. Higher on the floor boards. The actual driver environment temperature is less because of cooling devices in the car.”

To get an idea of the level heat of in the floor board of the car, in 1994, Darrell Waltrip got in his car and threw a sharpie marker on the floor board at Dover Delaware. At the end of the race he tried to pick it up for post race only to find it had melted to the floor board.
American Muscle

Carl Edwards stated he knew that he was not the only driver that was going down the straight away with his heels up off the floor board because his heels were burning. But he feels that the issue is not so much the effect of the heat on the driver but the effect of the heat on the car and the track surface. He stated that if you have a car that is not driving well or handling well and you are uncomfortable you are less patient with the car and yourself and competitors.

The floor boards have typically been a problem causing burns to feet and heels. Dale Jarrett and Darrell Waltrip have both reported 3rd degree burns to their feet on hot days in a stock car.  More recently, Brian Vickers burned his foot and his butt at Bristol because of an exhaust problem. In fact, one of the most common injuries in NASCAR is the driver’s feet being burned by the heat coming from the engine and the exhaust system which is right under the cockpit of the race car. Most drivers wear a protective boot over their shoes to help prevent burns to the feet and heels.

The driver’s cooling system lowers the temperature of the air that the driver’s are breathing by 20 – 30 degrees according to Kurt Busch. “But as the temperature rises in the car, the hoses become heat soaked and that raises the temperature some. I liken it to sitting in a hot tub with just my head sticking out.” Busch said.

Juan Pablo Montoya is not a big supporter of the cooling system, “We use water bottles with lots of ice and change it out every stop. But it’s just hot, no matter what you do.”

“The brakes are hot, gears are hot, the transmission is hot and that all transfers to the driver” added Jeff Burton.

The driver’s Koolbox, as it is aptly named, is a 5.2 lb instrument of relief. The box mounts behind the seat and pulls air in from the outside of the car. Aaron Edwards of CompuTech the manufacturer of the Koolbox that 50 percent of the teams in Sprint Cup use states, “The unit cools the air that goes into the driver’s helmet 30 degrees below the ambient temperature. It has a control box that they can adjust the air flow. The faster the air flow the less cool the air is. On high speed it cools the air about 20 – 25 degrees.” The box is thermal electric and has a filter that protects drivers from the debris that might be sucked in with the outside air that is pushed to the driver by way of fans.

Decision-making becomes muddled in extreme heat – that can be a deadly game at 200 mph.

“I had cold chills,” Buddy Baker remembered of the Southern 500 in 1986. “I knew if it was 107 degrees (outside) and 137 in the car and I had cold chills, something was wrong. I was lucky enough to finish the race and after the race I step out and the ‘cold’ air hit me and I went right to the ground.”

Baker continued, “If you’re really hot and confused, you don’t make great judgment calls.”

Hydration was an afterthought in the beginning of big-time stock car racing, when men would race in street clothes – maybe with an inadequate helmet – and lean an arm out of an open window. It got hotter inside the cars when tight-fitting cockpits with carbon fiber seats developed. Engine heat accumulated around drivers wearing full face helmets, gloves and multi layer fire suits. Baker, the 1980 Daytona 500 winner who competed at NASCAR’s top level from 1959 to 1992, saw some improvements during his time racing, but nothing like what drivers have now.

“We had Dixie cups with a little bit of icy water in it and nine out of 10 times when they tried to give it to you, of course the tire man would knock it out of somebody’s hand and you’d go, “I’m going to kill somebody if I don’t get something to drink pretty soon.” You might have to go another 100 miles before you even thought of getting another drink of water,” Baker said.

“We just kind of had to live with it from pit stop to pit stop, and then of course we had the opportunity to run with just a little bottle behind the seat and what would happen would be water would go down the tube and it would heat up and you’d take a sip of it and it would be like scalding hot water.”

“You felt pretty crappy going home on Sunday night and Monday you felt pretty bad and about Tuesday afternoon you started feeling really normal again,”  Buddy Baker remembered. “It took its toll on us.”

Drivers now utilize a hydration system within the car. Called G.I.D.S. (Gatorade In-car Drinking System) More than half of the field utilizes this three-quart insulated bladder which is attached to the frame of the car, allowing a battery-powered pump to supply fluid on demand through a tube with a bite-down nozzle that inserts into the helmet.

“That thing,” Five time champion Jimmie Johnson stated, “is a life saver.”

In the hot summer months teams have a hydration officer who keeps fluids iced and available to team and driver. The large trash can is stocked with ice water, Gatorade, and some sodas. “The biggest mover at this point is water and Gatorade. Some guys will drink the soda in the morning to wake up if they don’t drink coffee. But we do everything we can do to make it easy for them to stay hydrated.” stated the hydration officer of the day for the 24 HMS team.

Its long been known by emergency workers, police, fire and ambulance that as the heat rises, and the longer the heat socks in the more aggressive people become. The more violent crime we see. The lack of judgment becomes evident. The Coca Cola 600 was the longest race of the year. This year it was the hottest thus far. Although, we saw no outbursts the damage that Greg Biffle could have sustained was huge.

The heat factor would go up again in Kansas, this time with more obvious results. After the truck race a physical altercation took place between Richard Childress and Kyle Busch in the Camping World Truck Garage. The incident was apparently sparked by after race contact between Busch and RCR driver Joey Coulter. The normally mild mannered Childress struck Busch when in his own words, “I let my passion get away from me.”

Even Dale Earnhardt Jr stated, “I was fine until I got out of the car there.” Earnhardt Jr staggered leaving the car and was helped to the pit wall for a few minutes before heading to the media center for post race interviews. He sat on the end of the dais and did a TV spot with ESPN’s Marty Smith before climbing the stairs to the stage for questions from the media. The flushed Earnhardt stated when asked how long it would take him to recover from the heat,”I will be ok tomorrow afternoon. But I am just going lay around by the pool and enjoy a vodka or two.”

The physical issues from extreme heat exposure range from heat stroke, to heart damage and lung damage. If you stop and think about what happens if you heat a drinking straw, it gets soft eventually it stretches. In the human body this is called an aneurysm or a bubble in the wall of a blood vessel.  The bubble is caused by a thinning of the vessel wall. The vessel may stay bubbled without issues for years. Or it may rupture. Rupture causes internal bleeding which would be difficult to impossible to control depending on the size of the vessel.

Heat issues create a lack of focus and attention. The hotter we get, the more uncomfortable we become and we begin to focus on the heat and how uncomfortable we are and it compounds until finally our focus and attention is not on the task at hand but instead how uncomfortable we are in our environment. It’s a natural defense mechanism meant to make us change our environmental conditions.

Prolonged breathing of extreme hot air can cause drying and damage to the bronchial passage ways. You see evidence of this in children who have asthma that is triggered by extreme cold or extreme hot. People with respiratory conditions such as Emphysema and COPD are advised to avoid extremes in temperature for this reason. Heat dries the passages and can result in cracking or bleeding. Cold can result in hardening and a lack of expansion also making it difficult to breathe.

The hotter we become the less resistance we have to things like Carbon Monoxide poisoning. Carbon Monoxide poisoning is a huge risk in any type of motorized racing because of the fumes created by the combustion engine.

The creators of the KoolBox have added an attachment to the existing unit that filters 95% of the carbon monoxide in the air out. “The catalyst is good for about 3 races before it begins to breakdown,” Aaron Edwards said. At that time it must be replaced with a refill pack provided by CompuTech.

Rapid cooling procedures such as ice water soaked towels to the back of the neck or ice packs placed over the heart inside uniforms, although necessary can have dire effects as well. Everything from shock to stroke can result. Rapid cooling can also cause Blood clots. One must question how much the extremes in temperature and cooling played in say for example Brian Vickers difficulties last year.

Newly repaved tracks like Daytona also contribute heavily to the heat factor. The black asphalt holds heat rather than reflects it away like lighter and older pavement. Concrete tracks reflect the most heat but it reflects the heat upwards towards the car and driver.

Hot summer risks pose more risks to our drivers than just racing accidents. With the risks of heat frustration and exhaustion, carbon monoxide poisoning the drivers in all three of NASCAR’s touring series face huge obstacles that are more dangerous to their future’s and lives than just winning a race.

Although the solution seems simple enough, run night races in the heat of the summer months, logistically that is not possible. Not all the tracks have lights and the light systems to light tracks like Charlotte and Bristol are prohibitive in cost with out many years of budgeting and planning.

In 1992 when Charlotte Motor Speedway installed their fixed lighting the price tag was 1.7 million dollars. The 1,200-fixture permanent lighting system developed by MUSCO Lighting of Oskaloosa, Iowa, is a revolutionary lighting process using mirrors to simulate daylight without glare, shadows or obtrusive light poles. Daytona International Speedway reports that it costs 240 dollars an hour to operate their lighting system.

Many tracks are adding lights including the most recent Kansas Speedway. Although, the lights were not ready to be utilized at the tracks most recent date, the lights are in place and functional. Night races have larger response from fans. Most night races are reported as sell outs by the tracks that host them. The reasons seem obvious; it gives the fans another travel day to be back at work on Monday. It’s cooler. And the lights take us back to the old school racing where the sport got its roots.

As we head into the hottest part of the summer and tracks that are known to be the hottest on the circuit, drivers and teams will continue to battle the heat. They will test lighter weight uniforms, lighter color uniforms, and bigger and better Koolbox systems. All of which will help them to maintain their health, both physically and mentally in stifling 160 degree heat.

They will hyper hydrate in preparation for the 10 to 16 lb weight loss, that drivers typically experience on Sunday. They will utilize the assistance of Gatorade’s G.I.D.S. and their teams Hydration officer in order to maintain their focus and cognitive ability.

All of this will take place under the watchful eye of NASCAR’s medical team and governing officials.

When the P.A. announcer calls their name from the driver’s introduction stage, there will be no thoughts of heat or its possible effects. There will not be even the slightest of concerns in regards to hydration. The only thoughts on the drivers minds will be crossing the finish line first and racing 42 other guys for that spot. One can only hope that the cheering fans in the stands and those waiting anxiously at home realize the risks their heroes take when the summer sun beats down on the greatest racing series in the world.

Special Thanks to: Robin Pemberton, Aaron Edwards of CompuTech, and all the drivers that graciously addressed this issue and offered their insights.

The views and opinions expressed in this article are those of the author and do not necessarily reflect the official policy or position of


  1. A well written informative article. It made me realize the dangers the drivers endure other than just wrecking which alone is bad. A lot of time and research was put into the article I am sure.
    Roberta’s articles are always a pleasure to read. I look forward to her articles each week and wish we had more writers like her.

  2. Loved the article. It told of the problems that the drivers face during those hot races. Not only for the drivers but the crews, officials and the fans. I feel the most important thing is to keep everyone safe and for them not to have a life threatening health issue that could develope from the extreme heat. I agree that it would be nice to have night races during the heat of the summer but I understand the cost factor and some tracks do not have lights. Not sure what the answer is but we need to keep everyone safe. Great work Roberta keep up the good informative articles.

  3. Excellent article bound to trigger “DOH” thoughts from many a NASCAR mother/father/caregiver. When it comes to our children or those with disabilities, we are (hopefully) quite aware of the dangers of high body temperatures…how it can effect the patient, not just physically but mentally as well.

    While I have known about the high temps that drivers must endure, I never thought out the consequences in the manner stated in this piece.

    Thanks as always for a well-written and educational piece of work!


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