riceball777

With my evo I have an aem water temp gauge with the sensor on the thermostate housing. It reads from 180-195 no matter with or with out the ac on on the street or freeway or stuck in traffic. It does not matter if its 120 degrees out side and the car is running ac or if its 30 degrees and snowing. It like the cooling system works well.

Now i have a aem series 2 on my turbo ap1 with a aem serial gauge and the temps seam to more so much based on so many different conditions. The dash all ways reads 3 bars when the car is warmed up, does not matter if the serial gauge reads 150 or 217 degrees. The car runs much cooler on cold days or nights and also runs much cooler with the ac off and also runs cool at ideal or slow street speeds. During those conditions the serial gauge will read from 180-198 or so
but if I'm useing the ac on the freeway at 75mph on a hot summer day it will read 215 or so. The dash will still read 3 bars. The temps will drop fast if i either turn off the ac or get off the freeway and drive on the street at less than 50mph. I can blast the ac on a super hot day and it will never be over 205 or so as long as i keep it on the street at lover than 40mph, as soon i get on to freeway speed the temps with climb. I'm driven at freeway speed at temps 215 or so for 1 hour+ and the car seem to drive fine.

Other than that car drives fine. Is this normal? Does not seem to me like the cooling system can control the temps too well. How accurate is the serial gauge with the aem series 2. Am i over heating? I want to take my car to opening lapping track events and i feel like the temps would to way too hot.

Cooling setup is
mishimoto radiator, stock fans, mishimoto thermostate, seibon mugen vented hood. I also have a large front mount oil cooler and a large garrett 24x12x3.5 front mount intercooler

Nyther

The highway symptoms you are describing are the same with my setup.

i do have the updated series 2 coolant temp fixxed

( pfab stage 2/gtx3071R/seibon vented hood/ 13 row oil cooler )

On a typical 80F hot day im seeing 198-205F during normal street driving but when i go 70mph cruising on highway it will be around 203-212F depending on the throttle ( highway uphill/ straight ) and when it hits 212, it will drop lightning fast to 19x when i get off the throttle..

indi00

On a <100F day in stop and go traffic the coolant temp ranges from 180 - 200F.

At ambient temp of 100-110F in stop and go traffic, I sometimes hit coolant temp of 205-210F if the car idles for > 5minutes.

Cruising on the Freeway @ 70mph, the temp is below 190F on a hot 100F day. If the ambient temp is <80F, the coolant temp is always at 180F.


One time the fuse to my radiator fan melted and stopped working. Was overheating in traffic up to 220-230F. Got on the freeway to get home and cruised at 70mph and the coolant temp dropped down to 180F .

The intake in front of the radiator fan is sucking all that hot air doesn't help with the cooling.

sohc_mshue

I'm sure the temps you are seeing match what AEM is seeing from the analog input signal from the ect sensor. I too run hot when AC is on. It never evey trys to get hot with it off.

riceball777

My car is the same exact way. When on the freeway and I'm on the gas or am climbing a long hill the temps will climb fast. Temps will also drop fast when I'm off the gas or decelerating.

How hot is too hot? At what temp is it overheating?

Nyther

My honda dealership (which legally installs superchargers on s2k's in germany) told me that its fine to occasionally hit 225/230F.. I personally think thats scary but they told me the oem headgasket would hold up on those temps... When its overheating (cooking) you will be at even higher temps due to the 1.1bar rad cap which raises cooking temp..

I personally never let it go past 212 but that all in my head i think. Perhaps its okay like my dealer says to let it go to 220 or something... Who can say something about this?


I do have an oil cooler and i think keepin your oil temps in check is more important with a turbo kit (i went from 260 to 230f max oil temp with cooler)

03supers2k

I have a ball bearing gtx3076 tubular full race kit, and I think our cars run hotter due to the coolant going through the turbos maybe anyways. I have Mizu radiator, Samco radiator hose, Mishimoto rad cap, Mishimoto fan switch, Mishimoto thermostat, Greddy Oil cooler and sometimes rarely in traffic my water temps will rise to 215+ which i don't worry about because on average my temps are between 170-190. I also have a serial gauge and water temp gauge and they're usually together. So the serial is correct. My mechanic told me as long as your temps stays below 210 and never spikes above 240 you'll be fine due to the 1.3 bar rad cap and Honda coolant. So I don't worry about it. My tuner also set my serial gauge to flash if temps go above 240, I've never seen it happen so I don't worry about it. He knows best.

riceball777

Normaly cars run cooler on the freeway mor ig at high speeds oppose to siting in traffic. But My car runs very cool in bad traffic sub 200 degrees. The car runs how when moving at freeway speeds. I have never seen my car go above 220.

So let say I try to track my car. How hot is it to the point I have to let off or pull off the track?

Has anybody sucessfully tracked a turbo s2000 with a top/front mount sidewinder manifold?

GrandMasterKhan

if you want to track your turbo car you must have a V-Mount intercooler/radiator setup and a serious oil cooler.

AFs2k

Must? hmph...