Coolant Temps too High or What???

[DJ23GSX]

I just got back from a half hour ride in 88* heat. According to my datalogger after a bit of driving and a few hard pulls (0 knock) my coolant temps were reading 226* on the pocketlogger and 240* on MMCD. They seemed to settle around 223* on pocketlogger and 235*on MMCD after a few minutes of normal driving. Even while running this hot my factory gauge was barely past halfway and wasn't even close to the red. I'm thinking these temps are pretty high right? Also I don't know which logger software to believe..?? What temps are considered overheating?

So far I've done these to try and bring temps down a bit with minimal success.

Fluidyne radiator
Removed a/c condensor
new OEM radiator cap
new 180* thermostat
flushed radiator
added water wetter with a 60/40 mix water/anti
14" slim fan
Built ducts/scoupe around the fmic and sealed off the radiator for max airflow through it
Put heat shield on exhaust manifold
burped all air bubble out of system
compression test is near perfect on all 4 cyls (low 160's)

I'm not sure what else to do. I mean the factory gauge always used to run straight up right dead in the middle so I don't know what coolant temps used to run at. Only reason I started logging them is one day the needle was about 3/4 to the red zone. My radiator cap was leaking and after fixing that it never got that hot again. I do notice now that the stock gauge does sit a little higher now than it did before so thats why I'm being so cautious I guess.

Any help/info is appreciated

Thanks

 

[ApexVIII]

well first of all, the most antifreeze you want is 50/0 mix not 60antifreeze / 40 water

 

[DJ23GSX]

well first of all, the most antifreeze you want is 50/0 mix not 60antifreeze / 40 water

I'm running 60% water 40% antifreeze. I didn't notice I posted it backwards.

 

[My1GLaser]

I run 80/20 and use a 160* t-stat, but I live in the south. I would recommend 2 fans and this mod. 1st Gen Cooling Fan Relay Bypass Mod

Have you replaced the coolant temp sensors? Maybe they are wrong. Have you verified the temp with a thermometer? Get one of those meat thermometers that you stick into a turkey and tape it to your upper rad hose and run the car around for a bit. It will help you figure out what your temps really are. I can't see how your temps are actually that high with all the mods you have done.

 

[ApexVIII]

I'm running 60% water 40% antifreeze. I didn't notice I posted it backwards.

ahh ok , have you ran anykind of radiator cleaner/flusher through it?

i ran some radiator cleaner through mine and a lot of junk came out. i would try that. and get 2 12" fans not one 14"

if you can run stock fans but it might not fit depending on your set up.

 

[PIMking]

Yes thats too warm.

What I did on my 91 is build a air deflector that was about 2" down on the core support and that helped a ton.

I also took all my a/c stuff out so I didn't have the condenser on the car so I got more "clean" air to the stock radiator.

 

[qnz]

i would say you need 2 fans. When I ran 1 fan, my temps would climb to 230 in stop and go traffic. When I added a pusher fan in, temps never went past 215

 

[DJ23GSX]

I put radiator flush in it and drove it around for about a week then rinsed it out with distilled water. It was a little dirty but not as bad as I was expecting/hoping.

I have not tried replacing the temp sensor yet or the meat thermometer trick.

 

[DJ23GSX]

Ok so its 93* outside and I just got back from a half hour ride with some heavy pulls in between normal driving. Coolant temps reached 250* on mmcd and 236* on pocketlogger. I grabbed my infrared thermometer and scanned all over the water neck and the hottest spot I found was 230* right in front of the coolant sensor. Everywhere else on the water neck was in the low 200's and the radiator right where it meets the upper radiator hose was reading at its hottest spot 195ish. I am having trouble believing mmcd's readings but i dont know.

Even with temps that high i was only about 3/4 to the red zone. I was still below the normal temp high line though.

Could my keydiver eprom chip have anything to do with this? I didn't have this issue last summer and the only thing that has changed is the new ecu and keydiver chip.

 

[ApexVIII]

thats weird, i really dont know.

well if some how it is 230 right infront of the coolant temp sensor then that explains why the coolant temp sensor is reading 236

idk why the other logger says 250 though thats really hot

 

[DJ23GSX]

thats weird, i really dont know.

well if some how it is 230 right infront of the coolant temp sensor then that explains why the coolant temp sensor is reading 236

idk why the other logger says 250 though thats really hot

I would think if it were really 250* it would be in the red zone and spewing coolant all over the place no??

 

[ApexVIII]

I would think if it were really 250* it would be in the red zone and spewing coolant all over the place no??

probably