will a lower water temp affect performance?
#1
Rotary Freak
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will a lower water temp affect performance?
i had a napa brand thermostat in my engine for the longest time. it usually ran 90-95*C depending on how hard i was running it. i recently put a mazda oem thermostat in it. it's keeping the temp 83-85*C. i haven't had a chance to get on it any since the change. i was just wondering if a lower water temp would give a little more power, or if it will just help keep the motor living longer.
#3
Classy
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Are you serious? Not to be a dick but you have 897 post?
I have 3000+...I don't know crap. You can be too cold for a car and it will affect the car. Those temps are good, just before the thermo opens wide. You are ok.
#4
Originally posted by evot23
Are YOU serious? Post count tells you nothing. Don't assume people know crap cause of a high post count or know nothing cause of a low one.
I have 3000+...I don't know crap. You can be too cold for a car and it will affect the car. Those temps are good, just before the thermo opens wide. You are ok.
Are YOU serious? Post count tells you nothing. Don't assume people know crap cause of a high post count or know nothing cause of a low one.
I have 3000+...I don't know crap. You can be too cold for a car and it will affect the car. Those temps are good, just before the thermo opens wide. You are ok.
thermal efficiency plays a big part in an engine's performance... if you run too cold you will actually LOSE power
I'd say that you're in the right range with the OEM thermostat.
#6
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Originally posted by evot23
Are YOU serious? Post count tells you nothing. Don't assume people know crap cause of a high post count or know nothing cause of a low one.
I have 3000+...I don't know crap. You can be too cold for a car and it will affect the car. Those temps are good, just before the thermo opens wide. You are ok.
Are YOU serious? Post count tells you nothing. Don't assume people know crap cause of a high post count or know nothing cause of a low one.
I have 3000+...I don't know crap. You can be too cold for a car and it will affect the car. Those temps are good, just before the thermo opens wide. You are ok.
It's sad that people relate knowledge to post count...
#7
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I believe it's generally considered more efficient to run at hotter temperatures because you lose less combustion heat to the coolant.
However, you run a bigger chance of detonation if you run hotter.
In general.
On the other hand, I have been told by other racers that rotary engines make more power the colder they run. The car pulls very hard early in the race but as the temps come up it feels like it runs out of breath.
I wish I knew the answer but mine runs cold and I like the safety factor.
ed
However, you run a bigger chance of detonation if you run hotter.
In general.
On the other hand, I have been told by other racers that rotary engines make more power the colder they run. The car pulls very hard early in the race but as the temps come up it feels like it runs out of breath.
I wish I knew the answer but mine runs cold and I like the safety factor.
ed
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#8
Mr. Links
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Originally posted by edmcguirk
On the other hand, I have been told by other racers that rotary engines make more power the colder they run. The car pulls very hard early in the race but as the temps come up it feels like it runs out of breath.
On the other hand, I have been told by other racers that rotary engines make more power the colder they run. The car pulls very hard early in the race but as the temps come up it feels like it runs out of breath.
Many factors come into play with cooler engine temps (as in the oil not being warm enough to lubricate as well, combustion as you mentioned, etc). IMO, there is a reason Mazda has the thermostat open when it does.
#9
Rotary Freak
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i am by no means an idiot. i've single handidly built my car. i was just wondering if anyone thought i might be able to feel the slight change in water temp through the gas pedal. i know about thermal efficiency and combustion temp.
#10
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I agree w/Mahjik. But, I suppose a notieceable power difference is possible. Not necessarily because of the thermodynamics of it all. It's possible the ECU is pulling timing in reaction to a hotter block temp.
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Originally posted by Mahjik
The problem is mixing apples and oranges. While cool intake temps make better power, this thread is more discussion the operating temp of the engine which is different.
Many factors come into play with cooler engine temps (as in the oil not being warm enough to lubricate as well, combustion as you mentioned, etc). IMO, there is a reason Mazda has the thermostat open when it does.
The problem is mixing apples and oranges. While cool intake temps make better power, this thread is more discussion the operating temp of the engine which is different.
Many factors come into play with cooler engine temps (as in the oil not being warm enough to lubricate as well, combustion as you mentioned, etc). IMO, there is a reason Mazda has the thermostat open when it does.
I have not felt this myself but my water temps stay fairly constant throughout a race. If I am losing power, I'm losing more speed to overheated tires so I can't tell.
I run a stock thermostat. My temps do not rise. I would also like to know if different thermostats would make a noticeable difference.
I tend to doubt it would be noticeable.
ed
#13
Mr. Links
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Originally posted by edmcguirk
I was actually talking about coolant temperature. Some rotary road racers I know say that the engine loses power as water temp gets hotter.
I have not felt this myself but my water temps stay fairly constant throughout a race. If I am losing power, I'm losing more speed to overheated tires so I can't tell.
I was actually talking about coolant temperature. Some rotary road racers I know say that the engine loses power as water temp gets hotter.
I have not felt this myself but my water temps stay fairly constant throughout a race. If I am losing power, I'm losing more speed to overheated tires so I can't tell.
A lot of track guys notice a loss of power in the latter parts of their sessions from their IC's heating up but their coolant temps stay the same (i.e. intake temp).
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