Jump to content
SAU Community

Recommended Posts

Hey guys,

Just wanting to know at what coolant temperature did you guys back off at the track and start the cooldown lap ?

I know i should be going off oil temperature but i don't have a gauge for it yet so if anyone knows roughly what the coolant temp is at when the oil is around the 120 degree mark, that will help me heaps till i get the gauge...

Cheers!

It's not really possible to say what the relationship between oil and water temperature will be because it depends on too many factors, such as which thermostat and how well it's working, whether the stock cooler/heater is in place, how big the radiator is, etc etc.

What you can say though is that you really shouldn't be leaning on the engine hard when the coolant is up over 100°C, so you should probably be calling an end to the fun at 105 or so. It's a bit rubbery even there, because it depends on how rich the tune is, what the timing is like, what fuel you're running and so on.

Edited by GTSBoy

I had no issues pushing my coolant and oil to 145 degrees, other than the overflow bottle ended up overflowing. I will be running Evans waterless coolant if I ever take the Stagea to the track again.

Most new cars run 100 degree plus on the road. My thermo fan doesn't even activate till 105.

I usually back off once my water temp hits 120 and/or oil temp hits 140 (which I've never seen)..

I've got alarms for both of the temperature sensors so when it beeps I back off.

I've recently changed my water thermostat to a 67 degree Tridon item, car now runs at around 72~74 - this means I will now have about a 50 degree window before water is getting too hot. In the past I had a R34 thermostat (spares shop gave me the wrong one) car would operate around 90 degrees (which is quite normal for modern cars) however that meant I only had a 30 degree range before things got too hot

Oil wise, I'm running a massive Mocal core and a 80 degree thermostat - highest I've ever seen with the oil is 130.

That's my input (I might be completely wrong too - however car hasn't exploded yet haha)

I find that usually there's a 10~15 degree difference in water temp vs. oil temp when you're going full retard on the track

they're always same same for me, however I still run the factory water/oil heat exchanger which might keep the two very close.

Adding a thermostat that opens earlier shouldn't have any effect on the steady state peak temp the engine gets to. I mean at best it would give you another 20seconds of track time (the time it takes to get from 75 deg to 85deg or whatever).

Only improving flow through the thermostat would. I'd be backing off at 105degrees personally. Depends on coolant as we'll.

Agree that guessing oil temp from water temp is fraught with danger.

Edited by simpletool

Thanks for the replies guys, all really helpful!

Understood - it's a very rough correlation, but just till i get my oil temp gauge, it's better than nothing!

It sounds like i've been playing it quite safe so i might just keep what i'm doing.

Car has a 40mm alloy rad now, standard heat exchangers and standard thermo, running e85 on a track friendly tune via pfc. Coolant temp idle/cruises at around 78-80 and on the track soon as i see the coolant hit 90 i start cooling it down which isn't so much an issue as i get two hard laps at wakefield out of that and i'm only chasing PB's so the cooldown laps allow me to get the tires back to optimum along with all fluids/cooler and intake temp.

My water temp never goes over 100 and my oil temp never goes over 105. I'm running a chinese radiator/standard thermostat and a chinese remote oil cooler. That said I no longer have the restricive air cond condenser blocking the radiator.

Hope that helps

Neil.

I usually back off once my water temp hits 120 and/or oil temp hits 140 )

Im surprised to hear you let it go that high, i was getting maybe 7 laps around mallala before hitting 104 water temp 125 oil temp and cool down then. Std radiator and thermostat, with oil cooler. Maybe i can get more laps in

I worry about how hot some of the material in the head is getting when you let the coolant get that hot. Hot surfaces facing the hot gases are much much hotter than the cold wet side. Heat the cold wet side up 30 degrees above normal, and the hot side will actually end up somewhat more than 30 degrees hotter. This conducts throughout the metal, so even inlet ports and whatnot end up hotter than normal. Just doesn't seem wise to keep leaning on an engine once it gets that hot. Detonation risk increases, thermal expansion increases, softening risk for alloys increases, etc etc. I would either back off at a more sensible temperature or ensure that the cooling systems can cope with the loads required.

Im surprised to hear you let it go that high, i was getting maybe 7 laps around mallala before hitting 104 water temp 125 oil temp and cool down then. Std radiator and thermostat, with oil cooler. Maybe i can get more laps in

Well Nulon says a 50/50 mix of their concentrate brings the boiling point up to 132 degrees.. however I try to keep it below that incase the head lifts or I blow a head gaskets and/or hoses.

However, the extreme heating could have been from a faulty fan clutch, which I have replaced :)

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hi, is the HKS  Tower Bar still available ? negotiable ? 🤔
    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
    • Onto the android unit. You need to remove the top screen because there is a daughterboard to put inside the case. Each side vent pops out from clips; start at the bottom and carefully remove upwards (use a trim remover tool to avoid breaking anything). Then the lower screen and controls come out, 4 screws, a couple of clips (including 3 flimsy ones at the top) and 3 plugs on the rear. Then the upper screen, 4 screws and a bunch of plugs and she is out. From there, remove the mounting brackets (2 screws each), 4 screws on the rear, 2 screws top and bottom and 3 screws holding in the small plates on each side. When you remove the back cover (tight fit), watch out for the power cable for the fan, I removed it so I could put the back aside. The mainboard is held in by 1 screw in the middle, 1 aerial at the top and 3 ribbon cables. If you've ever done any laptop stuff the ribbon cables are OK to work with, just pop up the retainer and they slide out. If you are not familiar just grab a 12 year old from an iphone factory, they will know how it works The case should now look like this:
    • Switching the console was tricky. First there were 6 screws to remove, and also the little adapter loom and its screws had to come out. Also don't forget to remove the 2 screws holding the central locking receiver. Then there are 4 clips on either side....these were very tight in this case and needed careful persuading with a long flat screw driver....some force required but not enough to break them...this was probably the fiddliest part of the whole job. In my case I needed both the wiring loom and the central locking receiver module to swap across to the new one. That was it for the console, so "assembly is the reverse of disassembly"
×
×
  • Create New...