High-Flow Engine & Transmission Oil Cooler Thermostat
Free shipping on USA orders over $99
- Improved Racing's Flow Series Motor Sport (FSM) oil thermostat is a universal solution that can be used with any oil cooler on any vehicle or industrial application flowing up to 20 GPM (75.71 LPM).
- Accelerates fluid warmup time and maintains a minimum fluid temperature.
- Patented high-flow design with no valves, springs, or other obstructions in the primary oil flow.
- Features -10AN female O-ring boss ports. Optional adapter fittings available in various sizes.
- Lifetime warranty. Made in the USA.
Improved Racing's Flow Series Motor Sport (FSM) oil thermostat is a universal solution that can be used with any oil cooler on any vehicle or industrial application flowing up to 20 GPM (75.71 LPM).
The device's unique, patented internal design (US patent 9,772,632) ensures a low pressure drop by placing the bypass valve mechanism completely out of the primary oil flow. This arrangement also allows for a compact design.High performance vehicles require large oil coolers to ensure that the oil does not overheat during strenuous use. These coolers also introduce the danger of over-cooling the oil and delaying engine warm-up, resulting in horsepower loss, excessive engine wear and reduced gas mileage. Oil thermostats perform the critical function of bypassing the oil cooler until the oil has reached its minimum operating temperature.
The thermostat features female -10AN O-ring boss threads and is available with optional fittings in 3/8" or 1/2'' hose barb or AN fittings in -6AN, -8AN, -10AN, or -12AN. The included brackets allow for multiple mounting options.
Supersedes part numbers ENV-100 and EUN-1000.
Features and Benefits
- Reduces excessive engine wear and horsepower losses while improving gas mileage by preventing oil temperatures from dropping below optimal levels
- Maintains a minimum fluid temperature according to the typical stabilization temp in the table below, +/- 2°F (+/- 1°C)
- Patented, high flow, low pressure drop design locates the valve assembly completely out of the primary fluid flow
- Allows a small percentage (less than 10%) of fluid to continually circulate through the cooler to eliminate air pockets and prevent cold fluid trapped in the cooler from shocking the system
- Thermostat can never fail in such a way that fluid flow is blocked
- 6061-T6 billet aluminum construction with black MIL-A-8625 Type II anodized finish
- Lightweight at just 12.7 ounces (360g) without brackets or fittings
Temperature Rating Specifications
|Part Number||Typical Stabilization Temp||Activation Temp||Full Flow Temp||Recommended Application|
|FSM-145||145ºF (63ºC)||140ºF (60ºC)||163ºF (73ºC)||Trans & Diff Fluid|
|FSM-165||165ºF (74ºC)||160ºF (71ºC)||181ºF (83ºC)||Trans & Diff Fluid|
|FSM-185||185ºF (85ºC)||180ºF (82ºC)||203ºF (95ºC)||Engine Oil (Street & Strip)|
|FSM-205||205ºF (96ºC)||200ºF (93ºC)||221ºF (105ºC)||Engine Oil (Street & Strip)|
|FSM-215||215ºF (102ºC)||212ºF (100ºC)||233ºF (112ºC)||Engine Oil (Road Racing)|
Valve assembly is housed completely between the two ports. No valves, springs, or thermal motor interrupting the primary oil flow!
Compact dimensions (shown in inches)
Brackets allow for multiple mounting configurations
Available with 3/8" or 1/2'' hose barb fittings or AN fittings in -6AN, -8AN, -10AN, or -12AN
- Engine, transmission, differential, and industrial fluid cooling applications flowing up to 20 GPM (75.71 LPM)
- Passenger car automotive, marine, and experimental aircraft engine oil cooling systems
- Automotive and truck power steering fluid cooling systems
- Diesel and gas truck transmission fluid cooling systems
- Diesel and gas truck differential and transfer case fluid cooling systems
- Not for use with corrosive fluids. If used with water, a distilled water solution with a lubricant such as ethylene glycol must be used.
- 1x Remote thermostat block
- 2x Zinc-plated steel mounting brackets and screws
|Part #|| |
|Part Weight|| |
12.7 oz (360g)
|Primary Material|| |
Type II Anodized
|Minimum Operating Temperature|| |
|Maximum Operating Temperature|| |
|Inlet Port Size|| |
-10AN O-Ring Boss Female
|Outlet Port Size|| |
-10AN O-Ring Boss Female
|Maximum Operating Pressure|| |
300 psi (20.68 bar)
|Max Recommended Flow Rate|| |
Up to 20 GPM (76 LPM)
|Fluid Compatibility|| |
Power Steering Fluid