what is too hot. its like 45-50 degrees here in maryland and i see anywhere from 85-100 on my pfc for water temps. i get nervous when is get to the upper 90s. i think its usualy around 90-92 on my pfc. btw way mods are...
intake
front mount
upgraded radiator
dp
exhaust (downpipe back, not cb)

thanks yall

 

That's fine. If you start seeing temps over 112C, then start worrying.

 

Eugene,

Something is wrong with your cooling system. With outside ambient temps like those you should be seeing between 82 and 85C max on your Power FC. Did you recently install the upgraded radiator? I'd check to make SURE that all of the air is properly bled out of your system. You could have a huge air bubble in your system that will cause your temps to run much higher than normal. Are these temps while driving in town or on the freeway? Also, if you know someone who owns FC Datalogit have them adjust your fans to turn on at around 87C. This will also help get temps down, but my bet is that you have air in your system somewhere! Good luck!

 

I agree

 

I agree. There is nothing wrong. If you don't like to see temps around 100c, you will need to run your fans with a switch when driving around town, or in traffic.

 

You are fine

 

Bullshit. I HATE seeing this kind of advice on the forum.....most of us wouldn't even get on our cars hard at 82-85C.....the t-stat doesn't even open until 87C.

The PFC has the fans come on at 99-100C, which is still 5C cooler than the stock ecu turns them on. If you are in stop-and-go or going slow speeds for a while, you WILL get to 100C, it's just a matter of time. The fact that he doesn't see temps above that indicates that his cooling system is functioning just as it is supposed to.

Eugene, find someone with the data-logit (or buy one yourself) and have them lower the fan settings to a more reasonable setting (89-91C). You will still see up to 100C in the summer with the A/C on, but your normal temps will be whatever you set your fans to or less.

Overheating does not occur until about 115-117C, depending on the coolant/water mixture and assuming you are using the 13 psi/0.9 bar radiator cap.

 

i agree with ya'lls

 

thanks you guys. also i think i have a 16psi on on the filler neck. what would this do, and should i go back to the 13psi one?

 

are'nt stock ecu fan on temps above 220 degrees?

 

Yes, the stock fans come on at 221F (105C), as I stated above. Why Mazda has them coming on at such a hot temp, I don't know and will never understand.

 

I will just add yes your fine...

Temps outside dont always effect your water temps either.

 

Contrary to Ryan's post, I'm NOT full of s@#t! I understand his concern that bad advice runs rampant on this Forum, and I agree. My advice is based on personal experience with an FD that USED to run hot. I worked hard to bleed as much air out of my system and lowered my fan temps. The result is an FD that used to run in the mid 90s and now runs around 87 to 89C in the summer here in Phoenix when outside ambient temps are near 100F. This time of year with outside temps in the 50s (like Eugene), my PFC temps usually run between 83 and 86C. I don't take my posts lightly Ryan. I've been on this list for nearly 3 years and you can see just how few posts I have, so spewing good old fashioned cow dung is not in my nature. What's worse (in my opinion) is the viewpoint by many on this list that running above 100C consistently isn't all that bad or can't be remedied. Hard work, proper bleeding, and some work on the rad opening on the "mouth" of the car will get more air flowing through your rad and aid even further with your attempts to cool her down.

 

There are always ways to improve or upgrade ones cooling system. However, the main point is telling someone they have a problem when they really don't.

His temps may be higher than your temps, but that in no means is a bad thing. Using the stock thermostat, at 85C, it will just be opening. There is an optimum temp that your car should attain (for oil and other lubrication purposes).

 

you are within normal range. Just thought I might add my little 2 cents of experience.

 

ttt are you no longer responding to pms or what????

 

I didn't say you were full of ****, and in fact I respect some of the other posts you've made. But telling someone that something is wrong with their car when there's not, is wrong.

As Mahjik stated, there are ways to improve the cooling system, but Eugene's car is acting exactly like it's supposed to. Perhaps he may benefit a little bit from some troubleshooting, or maybe not.

As far as my temps in 50s F ambient, it will run 85-87C too, if the car is moving. However, once you get in stop-and-go, it will get up to 91C fairly quickly, which is where I have my fans set to come on. Also, in regards to regularly running above 100C, yes, I think most of us agree that it's not good for the car. However, anyone with a stock FD is REGULARLY running up to 105-106C in the summer, which is when the fans come on.

In any case, the car should not be run hard below 85-87C. That's too cold.

 

The whole point is that the car is not stock. He has an upgraded rad. When my friend installed his Koyo he never saw temps over 95c even in 115 degree weather we have here in Tucson stop and go traffic and he didn't have his fans set to turn on early. I agree with RCCAZ1 100% he probably has air in his system.

 

if you want an engine to last forever do every single cooling upgrade you can do....dont forget that 40% of our cooling comes from the oil...so it always helps to get an upgraded dual oil cooler kit...this will deffinately lower your temps....other than that...just invest into an upgraded radiator...i mean you can run your car like that...but it kills the life of your coolant seals....the cooler the engine runs the longer and better it will run...hope this helps peace out and good luck

 

i appriciate everyones advise. too add ive blead my system for a couple days. and it was as full as it could get. i check my water level everyday because somethings up and my water level warning light keeps coming on. so i know the level "seems" to be fine im gonna check it via a rx7 wiring diagram asap. im just getting a lil antsy about the temps because i do the most driving in the summer in 90-100 degree weather. of course ill always be aware and mindfull of the temps and level, but thanks yall, im a lil less stressed out abou thte situation. yeah, i just was a lil curious cuz i do have a upgraded rad. anyways again thanks yall

eugene

 

manoman, things get heated from time to time here. i think that we have all determind that his temps are fine.

 

If stock t-stat opens at 88C, PFC checks temp at hotest spot near t-stat entry (before rad), and 'stock' pfc turns fans on at 99-100C, how can there be a system problem with his 85-100C range, with typ's at 90-92?

cruising at 65 mph at low power in 45F could drop temps below T-stat close point for 85C reading, and stop and go traffic could kick it to fan trip point, esp aft some hard use.