andresj

iTrader: (8)

Hey I was searching but I can not find a good answer to my question. I have read that people run between 150F - 210F. My question is on my S4 Temp gauge (don't have an aftermarket one yet) how do I know I have reached that? What how many degrees is it when it's half way? Is half way on my gauge like 180? Let me know. What is 1/4, 1/2, 3/4 I really hope to get some answers

clokker

iTrader: (2)

Nobody is running 150°F.

From what I understand, "NORMAL" (185-190°F) on a S4 gauge is about 1/4 - 1/3.
I don't know how linear the reading is.

andresj

iTrader: (8)

So past half would be exceeding the maximum temperature? ++210F?

NeCr0mStR

iTrader: (3)

Yes... 210F would be extremely bad... Like crossing the streams Ray. Oh sorry just thought of Ghostbusters. They say 195F is bad and can cause an engine to pop.

Rob XX 7

iTrader: (8)

195 will not cause a engine to pop, thats just crazy talk

I can confirm clokkers findings, I use 3 temp gauges in the car and 180-190 is about 1/3 up the s4 gauge

KhanArtisT

iTrader: (2)

Whose "they"? The thermostat doesn't fully open till 195F. That is completely normal operating temperature. 210F isn't bad after a lot of boosting either. I believe 220 is when you need to shut down. There are a number of threads with info on water temps under different conditions.

rx7_FREAKKK

iTrader: (1)

I got an S4.. My temp gauge hardly leaves bottom. well maybe a few milimeters above the line

arghx

iTrader: (3)

Note the typo in the service manual... I believe crack temperature is supposed to be 177-183 F. The factory thermostat is fully open at 203 F. I find it hard to believe that temperature would be dangerous for the engine, otherwise Mazda would have designed the thermostat to fully open lower than that. I have been doing comparisons between my Power FC (reading the factory thermosensor on the waterpump housing) and the stock s4 temp gauge. Today with the ECU reading 93 C (maybe 200 F) I was about a 1/4 of the way up. At temperatures in the low 80 C range (mid 180s) the needle was just a little bit above the "cold" line. Now the gauge sending unit is on the rear iron, but those two temperatures can't be far off enough to matter much.

andresj

iTrader: (8)

ok cool so 1/3 of the way is approximately 190F? So when it reaches the Half way mark (1/2) how much more is it 10degrees? 20?

Rob XX 7

iTrader: (8)

when my car was NA it never, ever moved off 180-190, it ran so nice and cool when it was stock, solid cool like clockwork. If you go above half I dont know what the temp is but I would take it easy or just make sure nothing is wrong.

then I boosted the car and now I constantly stare at the temp gauge, lol