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C&R Racing 846-28190

Lightweight Late Model Pressure System 28" x 19" Double Pass Radiator

C&R Racing 846-28190


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C&R Racing 846-28190 Lightweight Late Model Pressure System 28" x 19" Double Pass Radiator $1,299.99
To order this item contact Customer Service at 1-800-345-4545.
Lightweight Late Model Pressure System
  • 28" x 19" Double Pass Radiator
  • Universal -20AN Female Port Bung Inlet*
  • 1-3/4" High Outlet

  • C&R Racing 846-28190 Details

    Late Model Pressure Systems

    *Note: Upper Radiator Hose Adapter (-20AN Port Adapter Fitting) is required for installation and sold separately!

    Race Day

    1. Fill cooling system with water and a water conditioner such as Safe Water Conditioner. Remove -12 port plug From top of accumulator and top off with water. Depress poppet on quick disconnect so that the air spring cavity will fill 75% with water leaving upper 25% as air space. MAKE SURE THAT THE SCREEN ON THE -12 PORT BUNG IS CLEAN (Where Applicable)

    1. Run engine with -12 port plug removed until ALL AIR has bled out of system. Fill accumulator with water to the top of -12 filler leaving no air space. Replace -12 port plug and warm engine to approximately 180 degrees.
    NOTE: Using water circulator will help purge air from system.

    1. Connect pressure filling tool to quick disconnect fitting. Increase pressure until water pushes through PRV (Approximately 35psi). Push water out until level on sight glass is at half way point. This is the operating level.
    NOTE: During this step of setting the water/air spring level in the sight glass you can visibly see if there is any air trapped in the cooling system.

    If the level in the sight glass is at halfway and when adding pressure the water level drops substantially or even disappears, there is an air pocket somewhere in the cooling system. Air will compress causing the water level in the sight glass to drop. When you take the pressure off, the water level will come back into the glass.

    Circulate the water by running the engine or use the water circulator to bleed out the air. When the system is properly bled, the level in the sight glass should only drop 1/2 " or less upon applying pressure.

    "Air will compress, water will not" This is an ideal way to test for trapped air.

    1. After setting level in sight glass at halfway, bleed pressure down to 15psi. This is the starting pressure with a 180 degree engine.


    1. Fill cooling system with water. Plug in water circulator and circulate to remove air. Depress poppet on quick disconnect to bleed air from air spring cavity and fill to top of sight glass. fill accumulator to top and replace -12 port plug.2. See step 3 under race day procedures.3. After setting level in sight glass, bleed to 5-8psi. This will be a starting point for qualifying with a cold engine and cooling system. This number is based on starting with a "cooled off" temperature of 50°F.

    About Pressurized Water Systems

    Pressurized water systems are relatively new to the short track and stock car world. This technology has been around in F-1 and Indy Cars for many years. C&R has been involved with the pressurized cooling systems through our Indy Car customers since it's inception. It's more efficient and more failsafe than the customary closed cooling system that has been around for the last 80 years. This is the future for cooling systems that will make it's way into the stock car and short track arenas over the next few years.

    Pressure in a cooling system is vital for keeping water in contact with the metal surfaces of the cylinder heads and block. Pressure keeps the air compressed and maintains the water to metal contact that is vital to prevent localized boiling or steam pockets in the combustion chamber areas of the cylinder heads. When a situation occurs that causes temperatures to rise such as lean fuel mixture, too much ignition advance, or a clogged radiator, the air in the water will expand and form small steam pockets. This will start in the combustion chamber area (hottest spot) and the steam pocket will be attached to the metal surface. These spots get very hot and since it's in the combustion chamber area, it will create a detonation problem. This is why engines lose power when overheating occurs. Once steam starts in the cooling system, the problem will magnify and continue to get worse.

    By keeping adequate pressure in the system, the boiling point will be high enough that this overheating situation can be prevented. The higher the pressure the higher the boiling point. For instance, at sea level with a 30 lb. cap the boiling point would be around 265 degrees. That's why we always recommend a 30 lb cap for racing. With our pressurized system we use an adjustable pressure relief valve instead of a radiator cap. We do this because it will go higher than 30 psi. The other components in this system are an accumulator and a tool to set the pressure in the system. The accumulator is a can, similar to a header tank, that the air bleeds into from the cooling system and this can also has a controlled air space that acts as an air spring. This air spring will compress under temperature expansion and keep water from going out the overflow. It keeps the pressure in the system and is the place where the system pressure is set.


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