If the cars run below 180, there is something wrong.
All shrouds should be in place for proper cooling.
With front mount, 3 core radiator, all areas blocked off and ising electric fan, I run about 200 (70mph) and city driving about 190. Electric fans suck but you gotta use them if you have to. Nothing beats stock fan.

 

Usually runs 80-82 deg C with up to 85 if I'm getting into it. Here's a datalog graph of a drive to work.

Stock setup with K&N and downpipe.

Henrik
87TII

 

Top Hose: 185
Bottom Hose: 124

Temps taken with IR Pyrometer after several hard Auto-x runs

Air Temp: 100

Mazdacomp Radiator
Spal 16" fan w/ full custom shroud
180 thermostat

 

Alright so highest I've seen is about 200 degrees on a really hot day.

 

Anytime come back and tell us what your temps are once the sender is in the proper spot.

 

180-190 at idle. Sometimes it will peak a little over 200 after a hot day and some WOT.

 

My cruise on the 401 to Ottawa last weekend saw the temp steady at 175F.

Fan's set at 190F. Kicks in all the time traffic but never on an expressway.

2 bottles Water Wetter, 70/30 water/coolant mix.

Expressway temps drop as low as 160F in the middle of winter...

 

I have 2 water temperature sensors. One near the thermostat housing for my gauge, the other at the block below the oil pedestal for my EMS.

EMS readings:

180-185F (82-85C) during normal cruising.
195F (91C) max under boost street driving.

225F (105C) max for hard lapping on a road course.

 

There's too many variables if you ask me. Here in Tx this month the temps are 100 degrees plus or minus five degrees. I just went for a ride of about 30 miles on Interstate 20 doing a steady 70mph. If the air conditioner is off, it runs at 195 degrees. If the air is ON, the temp reads approx 200 and a touch.

WE had a cold spell last week. The temps got in the upper 80's to low 90's. The cars temps were around 180 to 185. I'd say in Canada the air temp are probably in the upper 80's so I'd expect to see approx 180 or so at 70mph. Too many variables. Gotta be talking the same road speed and same air temps if you ask me.

 

Just came home doing a fair amount of freeway and street driving. Temperature stayed constant between 176-179F the whole time. Air just hits my oil cooler and then straight to the Koyo.

 

180 or lower

 

So....here we are three months later. The outside air temps are in the forty to fifty degree range now and the water temps are in the 170 to 180 range no matter how hard the car is pushed. Its a virtual stock radiator on a turbo car.

So like I said in my post above........there's too many variables (read outside air temps). The Mazda thermostat has a range b/t about 162 when it starts to open to being full open at around 190 something degrees. See the FSM for the exact figures.

 

Hailers so let me ask you, ho wcold do you want your car running man ? I mean on my 88 Turbo 2, im running 160 degress, and it seams like the car is running fine, even though the motor is low on compression, but it runs cool, yes when the car is pushed goes up a little in temperature. Ok stupid question, so after reading the previous posts im assuming the correct way is to install the probe in the upper radiator hose ? Or do I have to make a TAP, and install the sensor there ? Know I would like to know exactly "What is the correct way to install it, to get accurate readings ?

 

I used to have a very hot running engine...living in the Palm Springs area (115+ degree summers) it got to be a problem. Before my last engine let go I bought a Koyo radiator, along with the belly shroud, stock fan with new fan clutch, Mazda thermostat, and I removed the A/C completely. My old engine ran cool after that but the water seals let go and I swapped it with a Mazda reman. Now, in 110 degree heat, the car can be boosted with temperatures never climbing above 185, even uphill under constant load. Light load puts the temps at 180 give or take a degree.

Now that its cold out, I get two readings. My Haltech reads 180 at the water pump housing, my Autometer & infrared pyrometer read 170 at the heater hose outlet.

 

Stock radiator
J.C. Whitney electric fan
NO undertray
Gutted thermostat
SPI electronic water temp gauge
SPI sensor mounted opposite of stock water thermo sensor

If ambients are reasonable (70F - 90F), the car normally runs between 170F - 190F.

Ambients over 100F will cause elevated water temps at 190F - 220F.

Ambients that are cooler (50F - 60F) will cause lower water temps at 160F - 180F.

Running under boost will cause temps to rise after 10 seconds +.

Stop and go traffic will cause water temps to rise. Having the fan on will stabilize the water temp to about 180F - 190F.

This set-up will change soon.


-Ted

 

Fc Road Race car with a huge Griffin, Custom AST, Cantilevered hood, a large(24x2.5) vent cut in the front bumper where the moulding ought to be, and twin stock oil coolers. Water measured at the T'Stat. Oil measured at the filter.
HWY cruise ~170-180
road race(1/2hour session)~190-200
Oil(hwy) ~160
Oil (Road race)~200
This is w/~325rwhp
The upper limits are road racing in ambient temps of 80 and above. On a cold day the oil temps while cruising hover around 155-160, and water around 175.

 

yeah, my 20b runs cooler on a hot day

 

Mine seems to stick at about 165 no matter what (165 is the thermostat I have installed)

Koyo rad, new water pump, water wetter and 30/60/10 mix coolant/water/water wetter.


Cooling is never an issue.


-Robert

 

Uh, on a stock FC rad???


-Ted

 

K2RD rad, IIRC.

 

how high does the temp get when you over heating?

 

I would like to know what is considered overheating ?
What kind of temperature is considered overheating ?
In other words, how hot before I would turn off the car so it doesent do engine damage ?

 

...but gives some insight into temperatures:

https://www.rx7club.com/showthread.p...hreadid=212134

 

I bought a KOYO radiator last week on a whim. Prior to the install the water temp at 70mph, A/C on, was aprox 185 observed over several days. After the install the same temps, same conditions, same road at 70mph, the temps are approx 165-170. A guesstimate is that its running a good 15degrees cooler. By the way, that makes me wonder about the Mazda thermostat in the car. Wouldn't you?

I don't consider the temp too hot til it reads close to the 200 degree mark steadily. Then it's time to think there might be something amiss. I was seeing those temps last August Sept with the A/C on. I expect to see something less this year.

By the way, modern cars are made to run (on purpose) with 200 degree temps from what I've seen using a Actron SuperAutoScanner on a Windstar and a Expedition.

 

s5 GXL TII conversion: mine sits at around 187.5 deg F on around 70F outside, sunny, engine idleing around 2k.