b'Radiator Tech InfoRadiator Cooling Tech Tips: Do not use regular tap water for your radiator. There are too many minerals in tap water that will corrode your radiator & engine. Always use distilled water. Road racing sanctioning bodies like SCCA & NASA dont allow you to run ethylene glycol (Anti-Freeze) because it is extremely hard to clean up on track.What works best is distilled water with the correct lubrication & increased cooling additives. From experience, we have found Redline Water Wetter (which does NOT contain ethylene glycol) to make the water cool the engine better, and the engine to run 5-10 cooler. It also has rust & corrosion protection. Other brands may, or may not, work just as well. Rons teams always ran the Redline Water Wetter.Pressurizing the radiator system raises the boiling point of the coolant (water). At low pressures every 1 PSI in the radiator system raises the boiling point of the coolant about 3 initially. But that gain tapers off the higher we go. NASCAR Cup Teams run upward of 100 PSI in their cooling systems with a boiling point of 335. Most radiators would explode well before that pressure. To our knowledge only C&R & Fluidyne build special radiators capable of handling 100 PSI.Most standard radiator caps will hold pressure to 12-16 PSIraising the boiling point about 35. Good, but not good enough. We typically run a 38-42 PSI cap from Stant or C&R (same) raising the boiling point about 80. That creates a boiling point around 290. Engines can run a lot hotter than you think and be fine. NASCAR teams typically run their engines at 290as the target temp. Think of boiling point as your Game Over point. Once the water is boiling, it is no longer solid water against the inner walls of your engine. Water cools. Air bubbles do not. Once your engine coolant is boiling, the temps will skyrocket to the point of melt down if you continue running.With the electric fans fully shrouded, there is an airflow speed of your car that will surpass the airflow of the fans. No one can tell you exactly what MPH it is, because there are a lot of variables. For sake of conversation, until you test your car, lets say that speed is 65 MPH. That means below 65 MPH, the two fans running will flow more air across the radiator than airflow through your grille. But above 65 MPH the electric fans running actually become a limiter as to how much airflow the radiator sees. In this case turning the fans off, when the speeds are above 65 MPH, will cool better. For road racing & track cars, we suggest putting your electric radiator fans on switches. This way you run the fans when sitting on pit lane or driving low speeds on track due to a caution flag.It is possible to have too much airspeed through the radiator at high track speeds. For this reason, someracers tilt the radiator forward as much as 30 to slow the airflow through the radiator. This works if you are running your radiator with NO Coolers front or rear. But if you are running coolers front and/or rear of the radiator, these coolers combined with the radiator are already slowing the airspeed. Tilting your radiator AND coolers forward would slow the airspeed too much. With coolers front and/or rear of radiator, what works best is the radiator a true 90 to the incoming airflow from your grille opening.Redline Water Wetter:oUnique Agent for Cooling Systems That Conditions the Water,Improves Heat Transfer & Reduces Cylinder Head Temps oRust and corrosion protectionoUse 1 Bottle for most Radiators / Treats 3 to 5 gallons of Water oCompatible with Antifreeze (including DEX-COOL) oSatisfies ASTM D2570 and ASTM D1384 Corrosion Tests oContains No Ethylene Glycolo6-Pack - $83.34 702'