I recently purchsed a turbo car that has the Spoon thermo switch and thermostat. It keeps the car between 162-169 degrees roughly... but is that hot enough?

I'm used to 180-190, and was curious if that will effect the tune of the car, etc.

84mm gsr, 10:1, pump gas, GT35R, car makes roughly 500whp on 18psi

Thoughts?

 

Im pretty sure s300 has fuel trim tables based on engine temp so it could effect the tune. Imo 160-170 is a bit cold to run an engine though.

 

No it's not

180-190 equals maximum power production, temps closer to 200-210 equal better fuel efficiency.

 

Thanks for the feedback guys, I didnt really like it that cold either.

I went ahead and ordered new OEM thermostat and switch. Back to stock we go.

 

Never understood why people waste money on these low temp things. they dont work. it doesnt allow the engine to get to proper temp and it also ends up with a thermostat staying wide open and not allowing the cooling system to do its job. OEM thermostats ONLY !!!! Also S300 has the ability to turn the fan on whenever you ant the fan switch was a complete waste of money

 

Low temp coolant hardware is good for track days, where the car is being driven hard and put up wet. When you're ragging the car that hard, it doesn't matter what the fan is set to, that engine is going to get HOT. Lower temp hardware keeps it from getting too hot.

 

No it wont, because after that low temp tstat hits its max temp it wont ever shut, and youre at the mercy of your radiators maximum cooling capacity.

Lowering the fan temp engagment will keep it from getting hotter than a certain when its sitting, but if your cooling system isnt up to the task of cooling the engine nothing will help it.

Not racing, but flat out ragging on my car in 3rd gear in over 100f temps, at 80mph with various loads and speeds, I managed to hit peak oil temps of 230, but never saw coolant temps higher than 185, bevause my radiator has enough cooling capacity not to get overheated. If I had a half core im sure the hour+ of beating it wouldve saturated the radiator and the temps would start climbing

 

The only thing I use is a lower temp tstat, along with water wetter and distilled water, let the ecu control fan actions, and use a pwm controlled electric water pump... no issues ever.

 

 

lol.

I never understand why people try so much fancy **** when the simple things work, too many people trying to reinvent the wheel.

 

Mythbusters tried to reinvent the wheel. Conclusion? Round wheels are better.

Point of post? Oem **** is better. Except for radiators, oem radiators leave much to be desired

 

oem radiators suck... oem water pumps suck on high power, high rpm cars because they cavitate, don't flow enough, rpm dependant flow, etc.

 

This thread can be closed. I personally would never buy any aftermarket thermostat or switch. Wanted to see the consensus on running the engine at 165-170, too cold.

I actually had a brand new OEM thermostat in my parts collection, and just ordered a new factory switch and housing. Will be putting the car back to stock next week

Then off to dyno in a few weeks.

 

closed it is