What are your temp readings?
#1
Greasy bastards..
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What are your temp readings?
i,ve been reading about alot of coolant problems & still not really sure of what temp is proper operating temp, recently added aftermarket guage & would like to know what temp everyone is running, just normal everyday driving, minor upgrades, thanks
#4
Urban Combat Vet
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I agree with BillM's range of temps, but what is "normal" within that range is dependent on the car's condition, state of tune and what (if any) modifications you've done such as FC Thermoswitch, larger radiator, coolant to water ratio, ambient temps, number of oil coolers, etc.
#5
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"Optimum Temps
65C (150F): too cold. According to service manual, EGR valve is non-operational below 150F, "to improve drivability when cold."
82C (180F): getting warm. Thermostat begins to open, circulating coolant through the radiator. Some coolant is still bypassing the radiator.
95C (203F): fully warm. Thermostat is fully open, not bypassing the radiator at all.
100C (212F): boiling point of pure water at atmospheric pressure.
105C (221F): getting hot. Stock ECU will activate fans to cool the car down. Fan speed will be low, or medium (if A/C is already on).
108C (226F): hot. Stock 93-95 coolant thermoswitch activates, changing fan speeds from low>> medium (or med>>high if A/C is already on) (switching to an FC thermoswitch will change this temp to 203F)
115C (240F): getting dangerous. OEM temp gauge begins to rise.
117C (243F): dangerous. boiling point of pure water with 13psi pressure cap.
121C (250F): too hot. OEM temp gauge will point to white line. Boiling point of pure water with 16psi pressure cap.
124C (256F): way too hot. Boiling point of pure water with 19psi pressure cap. Boiling point of 50/50 coolant mix with 13psi pressure cap.
127C (260F): way too hot. OEM temp gauge will point to red line."
During regular driving around the suburbs, I actually have to work to get my water temps up to 180. During cruise, it is usually is just under 180. If I am driving hard on the freeway with lots of boost, then I'll see the temps to up to 220F, but it drops right back down as soon as I drive sanely for a minute (ie 85 mph in 5th gear).
#6
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i guess i was too busy reading peoples cooling problems to find that, thanks for the info, i have an aluminum rad [godspeed from e-bay], exhaust, cold air intake, no other mods, seeing 190f. on highway, as high as 220f. stop & go traffic, thanks again.
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#9
Eats, Sleeps, Dreams Rotary
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With the PFC and Datalogit I have set the fans to come on at 85C. Temperatures rarely go more than a few degrees beyond that even after multiple high boost runs. Shutdown heatsoak temperatures can be up to 110C but they drop quickly to the mid 80s after startup. Cooling system is stock.
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With the PFC and Datalogit I have set the fans to come on at 85C. Temperatures rarely go more than a few degrees beyond that even after multiple high boost runs. Shutdown heatsoak temperatures can be up to 110C but they drop quickly to the mid 80s after startup. Cooling system is stock.
I've just set my fans to come on at 90C. The rational is that the only time I go past 90C is when I'm under boost and then the temps will tend to jump up to close to 220. If the fans start to come on at 90C the temps should still reach 95C but not rise as quickly past that 95C mark. I'll see what it does at the autocross on Sunday.
#14
Seismic Disturbance
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freeway: 76-79*C
stop-and-go traffic: 82-87*C
my fans come on at 86*C
Pertinent mods:
Koyo radiator in slightly modified stock location with KS Auto Burnout II bumper (as well as the other 7 pieces)
stock hood
Pineapple oil sump
Efini y-pipe, downpipe, high-flow cat, RB dual
stop-and-go traffic: 82-87*C
my fans come on at 86*C
Pertinent mods:
Koyo radiator in slightly modified stock location with KS Auto Burnout II bumper (as well as the other 7 pieces)
stock hood
Pineapple oil sump
Efini y-pipe, downpipe, high-flow cat, RB dual
#15
needs more track time
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I wonder why you have the fans come on at such a low temp. The thermostat doesn't open until about 82C. It isn't fully open until 95C. If you are adding more cooling to the rad with the fans at 85C, all you are really doing is keeping the thermostat from opening completely. Less coolant flow through the engine means less heat transfer and higher possibility of local hot spots in the engine. Seems to me that the range between 83C and 95C would be considered normal operating temps and the "best" temperature to operate at would be 95C. That would be the lowest temp possible with maximal coolant flow (at least with the stock thermostat).
I've just set my fans to come on at 90C. The rational is that the only time I go past 90C is when I'm under boost and then the temps will tend to jump up to close to 220. If the fans start to come on at 90C the temps should still reach 95C but not rise as quickly past that 95C mark. I'll see what it does at the autocross on Sunday.
I've just set my fans to come on at 90C. The rational is that the only time I go past 90C is when I'm under boost and then the temps will tend to jump up to close to 220. If the fans start to come on at 90C the temps should still reach 95C but not rise as quickly past that 95C mark. I'll see what it does at the autocross on Sunday.
I agree. Especially if you are running a SMIC or VMIC. Running my custom Vmount, my coolant temps hover between 82-88 C in highway driving. They only go higher if I get stuck in stop/go traffic. I set my fans to engage at 90C then 91 and 92 (IIRC).
Before my Vmount, I was using a Greddy FMIC with fans set to engage at 85C. I went through 2 sets of fans b/c they were constantly on at 85C. Typical coolant temps were 92+C in highway cruise and higher in stop/go traffic.
#16
Searching for 10th's
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I agree. Especially if you are running a SMIC or VMIC. Running my custom Vmount, my coolant temps hover between 82-88 C in highway driving. They only go higher if I get stuck in stop/go traffic. I set my fans to engage at 90C then 91 and 92 (IIRC).
Before my Vmount, I was using a Greddy FMIC with fans set to engage at 85C. I went through 2 sets of fans b/c they were constantly on at 85C. Typical coolant temps were 92+C in highway cruise and higher in stop/go traffic.
Before my Vmount, I was using a Greddy FMIC with fans set to engage at 85C. I went through 2 sets of fans b/c they were constantly on at 85C. Typical coolant temps were 92+C in highway cruise and higher in stop/go traffic.
#17
F'n Newbie...
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What temp would you need to reach to really worry about warped housings and/or blown water seals?
I ask because I managed to blow my 60A Rad Fan fuse the other day... didn't realize until after I picked up a friend and got stuck in traffic about two blocks from my house.. noticed the temp rising, but the fans not kicking on. Ended up hitting like 117-120 c before I got into the garage, popped the hood and turned her off...
Obviously I will be checking for all the tell tale signs once I replace the fuse and start the 7 again.
I ask because I managed to blow my 60A Rad Fan fuse the other day... didn't realize until after I picked up a friend and got stuck in traffic about two blocks from my house.. noticed the temp rising, but the fans not kicking on. Ended up hitting like 117-120 c before I got into the garage, popped the hood and turned her off...
Obviously I will be checking for all the tell tale signs once I replace the fuse and start the 7 again.
#19
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I am stumped --- @ if I start my car and let it idle for 15 minutes with the a/c off, it will get to about 114 C. but if I do that with the a/c on, it stays around 100c
I bought my car basically bone stock, the only mod the owner did was a straight through cat (and a new muffler).
I also believe that my OEM stock radiator is rusting from the inside; if I upgraded to a koyo / fluidine, do you think my normal operating temp's would go down?
The vacuum is good - around 19 - 20 inches at idle & 15-17 with a/c on.
I bought my car basically bone stock, the only mod the owner did was a straight through cat (and a new muffler).
I also believe that my OEM stock radiator is rusting from the inside; if I upgraded to a koyo / fluidine, do you think my normal operating temp's would go down?
The vacuum is good - around 19 - 20 inches at idle & 15-17 with a/c on.
#21
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Am I completely wrong here? I swear that both fans should run at the same time. The only thing that changes is the fan speed, not the number of fans that are running.
#22
needs more track time
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I am stumped --- @ if I start my car and let it idle for 15 minutes with the a/c off, it will get to about 114 C. but if I do that with the a/c on, it stays around 100c
I bought my car basically bone stock, the only mod the owner did was a straight through cat (and a new muffler).
I also believe that my OEM stock radiator is rusting from the inside; if I upgraded to a koyo / fluidine, do you think my normal operating temp's would go down?
The vacuum is good - around 19 - 20 inches at idle & 15-17 with a/c on.
I bought my car basically bone stock, the only mod the owner did was a straight through cat (and a new muffler).
I also believe that my OEM stock radiator is rusting from the inside; if I upgraded to a koyo / fluidine, do you think my normal operating temp's would go down?
The vacuum is good - around 19 - 20 inches at idle & 15-17 with a/c on.
The rad only helps at speed really. The stock rad does a good job of cooling a mostly stock car. Do a few searches on that. Thicker rads actually make it more difficult for air to flow through the radiator and that really is what makes a radiator cool the fluids. It radiates the heat to the air coming through the rad.
By the way, anyone with coolant system questions really should read the thread in the FAQ link. Lots of good info in there.
#24
wannaspeed.com
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I am stumped --- @ if I start my car and let it idle for 15 minutes with the a/c off, it will get to about 114 C. but if I do that with the a/c on, it stays around 100c
I bought my car basically bone stock, the only mod the owner did was a straight through cat (and a new muffler).
I also believe that my OEM stock radiator is rusting from the inside; if I upgraded to a koyo / fluidine, do you think my normal operating temp's would go down?
The vacuum is good - around 19 - 20 inches at idle & 15-17 with a/c on.
I bought my car basically bone stock, the only mod the owner did was a straight through cat (and a new muffler).
I also believe that my OEM stock radiator is rusting from the inside; if I upgraded to a koyo / fluidine, do you think my normal operating temp's would go down?
The vacuum is good - around 19 - 20 inches at idle & 15-17 with a/c on.
Sounds like you have a problem with your fans or thermostat. Troubleshoot that first.
The rad only helps at speed really. The stock rad does a good job of cooling a mostly stock car. Do a few searches on that. Thicker rads actually make it more difficult for air to flow through the radiator and that really is what makes a radiator cool the fluids. It radiates the heat to the air coming through the rad.
By the way, anyone with coolant system questions really should read the thread in the FAQ link. Lots of good info in there.
The rad only helps at speed really. The stock rad does a good job of cooling a mostly stock car. Do a few searches on that. Thicker rads actually make it more difficult for air to flow through the radiator and that really is what makes a radiator cool the fluids. It radiates the heat to the air coming through the rad.
By the way, anyone with coolant system questions really should read the thread in the FAQ link. Lots of good info in there.