Pic 1: Nismo Low Temp Thermostat (Part No. 21200-RS580)
Just got hold of the Nismo Low Temp Thermostat (Part No. 21200-RS580) for the ER34. This is a direct replacement for the factory unit. Basically, just plug and play, and off you go.
The ER34's factory unit will open at 76.5 degrees Celcius (170F) whereas the Nismo version will open earlier at 62 degrees Celcius (144F).
This will in turn lead to a cooler running engine and is crucial if you're planning to run higher horsepower. With an earlier coolant circulation inside the engine, it reduces the power loss caused by rising coolant temperature during high speed driving or at the circuit.
Ideally, this would complement a aluminum radiator perfectly BUT at the moment, due to budgetary issue, that is on hold first. Got to save up for an aluminum radiator. :(
Pic 2: This is what's inside the box
Pic 3: Nismo Low Temp Thermostat
Pic 4: Nismo Low Temp Thermostat
Pic 5: Nismo Low Temp Thermostat
Pic 6: Nismo Low Temp Thermostat
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