On my 85 what does the coolant guage equate to in degrees.


If you look at the guage and you have the C then you have a small line about 1/8 way up from there, on the haltech it equates to 190 degrees, what is 1/2 way and what is the line that is 1/4 from the H?


Im trying to figure out where to set the electronic fan at...

Thanks

 

Let's just say according to Mazda Racing Books, the Thermostats that they use are:
160 degrees is used for Racing Purposes
180 degrees is used for Southern (warm) climates
190 degreed is used for Northern (cold) climates

200 degrees+ is considered cooking your engine.

Considering you have a Turbo, I would probably set it at 170ish degrees to kick the fan on, IMO.

 

My car tends to hover around the 175 degree mark, according to my Autometer gauge. It runs fine and has been this way for a long time. I still use the clutch fan, and my thermostat is an 82 deg/c unit (180 deg/f).

When I go thermos, sometime in the future, I'll set mine for about 170-175.

Hope that helps.

 

Wasnt talking about thermostats.. I wanna know what the guage on the dash equates to in degrees at certain places...

My haltechis showing 180-190 degrees when warmed up, but my guage is barely over 1/4

Are 13b and 12A coolant temp sensors different...

Guages use a different resistance? Id assume the haltech to be right

 

That's because you wired it wrong!

The gauge wires come from the Driver's side, and the engine ECU wires (including engine coolant sensors) come from the passenger side.

Well, at least that's what I have confirmed on two other GSL-SE's with aftermarket ECU's.

 

...and mine's in celsius, so that's no help...

 

Humm Alex, let me reflect here... Um NO I wired it right...

The harness that came off the car, EVERYTHING went to the pass side... And guess what I even tried the wire, I turned the key on, and grounded the end, guess what the guage did? Yeah went all the way to Hot ... So guess what I DONT HAVE the wrong wire!

I dont have a SE, mine was a 12A car...

 

its ok, mike. if it starts leaking out the seams, its too hot, lol. mine showed a bit less than 1/4 when i was running around 150 degrees on the autometer. i'd assume that is the standard for all the 1st gen gauges.

 

This answers my question

All 81 up coolant temp sensors are the same ( one next to the oil pressure sender)

 

Also got to thinking if you dont get water hot enough it wont make pressure, Ive never seen anything return to the reservoir or suck from it either...

 

Alrighty then.

My stock gauge usually sits at around 1/4, which on the Autometer is about 170-175, I installed the Autometer because I didn't particularly trust the stock gauge.

I use the Carbon Fiber Series Autometer gauges which I believe are quite accurate.

I haven't seen any overflow or sucking back from the reservoir either.

 

It seems to me that it would be unlikely that, for instance, 1/4 would equal 160* on all first gens. After hearing about the inaccuracy of stock gauges (and experiencing this first hand in my second gen), I can only assume the temps would have to be measured on a case by case basis. Of course, they should be fairly close at least.

Oh, and Mike, why aren't you using aftermarket gauges on your car? I know, you wasted (that's right wasted) all your money on the engine and Haltech, right? Pssshhh, you should've just gone V8

 

The guys on the 3rd gen forum told me 180-210 or so is normal. If you go over 215 start thinking about walking...

@redwood You know its still not too late to do a V8, its starting to look better all the time, considering I will have to drive F^%KING 1000 miles to get someone that can tune this F^%KER.

 

Where can one acquire a thermostat that is lower than the stock 180?

 

I have one that I got from my local RX-7 mechanic/tuner/racer. It's what he uses in his races cars. It's a 165* or 170*, I can't remember which. Made by a company called CST. Maybe too low for you, but has successfully kept my 13B cool and running great for the last couple years.

 

Are you sure you can trust the gauge?

I don't think all gauges will read the same point; even at the same temps. You just have to get a feeling for where you car is supposed to run.

Mine ran about a needles width behind the thermo figure with my first two engines; 3rd motor is running about 1-2 needles higher.

 

i put an aftermarket gauge on my gsl-se, and during normal driving, it will run between 83-90c, the stock fan comes on at 91c. also my stock gauge is dead accurate, within about 2c, its more well damped. when the stock needle is right on the left of center its about 90c.

mike

 

Where are you from, j9fd3s? One of the Commonwealth countries? I've a celsius gauge as well, also running just to the left of centre, and the Americans were telling me that's running hot. I suspect there's slightly different calibration of temperature to needle position between fahrenheit and celsius gauges in these cars.

 

Not sure I can trust the guage, thats why I am asking this... I do however trust the Haltech, it seems very accurate. The stock guage is what seems to be fishy... If its reading a little over 1/4 and thats 190, I think the guage or the sender is screwy, so maybe its time to get a different coolant guage

I did however take a hi temp thermometer today and place it in the radiator, and it read 188 and the haltech reads 189 so Id say the haltech is very accurate. next thing to do is remove the stock water temp sensor and the haltech's, put both of them in the same boiling pot of water and read the resistance, if its the same then they are right and the guage is the weirdo Guess for the first month or so of driving the car, I will take the lap top with me

 

My stock gauge is celcius as well. starts at 40 and goes to 120. It always sits at about 1/4 and never gets close to half. That's why I don't trust it, and installed the Autometer. Also, it's got no markings on it except the bottom and top readings, so it's hard to get useful info from it.