Keep It Cool

Keepin' It Cool: How To Protect Your Drag Racing Vehicle From High Temperatures

Racing heavily stresses the transmission and causes it to heat very rapidly. It has been proven that for every 20°F your transmission increases, it cuts the lifespan of your transmission and transmission fluid in half. While this is well established and widely understood, there are still plenty of solutions to keep your engine working in top condition to combat the issue.
Here are our recommendations for keeping your engine in the best shape possible, despite heat factors, for various types of drag racing:
1. If your car is driven on the street or driven back to your pit area after making a pass, always run a cooler and if possible electric fan. We see too many customers with looped cooler lines. In a powerglide transmission, a looped cooler line dumps the automatic transmission fluid at its highest temperatures (directly from the torque converter) into the gear set and clutch packs. This causes early failure of all components. 
2. BTE recommends using a high-quality cooler. We offer transmission coolers from Derale. In high-powered setups where a ringless input shaft is required, use a pump that is designed to maintain cooler flow. Our high volume pumps all maintain good cooler flow and pressure when used with our ringless input shaft. A ringless input shaft installed in an OEM style pump will have no cooler flow or pressure, which results in all of the superheated transmission fluid dumping directly into the gears and clutch packs.  
3. If your car is towed to the starting line and towed back to your pit area after making a pass, there is little time for a cooler circuit to have any effect on the transmission temperature.  Therefore, it is OK to run a looped cooler line or use an input shaft setup that has no provision for the cooler circuit. In this scenario, the transmission and torque converter will still be extremely hot after making the pass. We recommend using an external cooler. We have also seen reasonable success using a high-velocity fan or leaf blower directly aimed under the car for some cooling effect. 
4. Use a quality ATF. Our choice is a blended fluid made specially by Lucas Oil. Synthetic and semi-synthetic fluids manage heat better than conventional fluids and also maintain better lubrication than alternative oils.   
Heat kills. But, if you’re having trouble in your drag racing car with failed parts or inconsistent performance, a few adjustments to your setup can make the difference between a broken car and a winning car.