Overheating?

[Mr. Keets]

Over in Perth it gets as hot as , well as it get anywhere I guess. I've run my modified GT-R in the heat but I dont like doing it. While this isnt YET specific to my Turbocharged 5 this where I have arrived at over the years.

Quality gauges...the OEM deals are slow acting and inaccurate
Oil cooler
Red Line oil...if the car means anything to you RED LINE
Red Line Water Wetter in distilled water.

[lil red rocket]

By the way with no air con on I'm running at 84-86 degrees around town and on the highway. That's with both fans running (turn 84 degrees). Also there may be a descrepency with the digital water temp readout from the MicroTech ECU as it is reading about 5 degrees over ambient before I start the engine in the morning.

Another mod so the fans aren't running all the time: -
I think I'll control the Air con fan with a turn on of 87 degrees plus a manual override switch. I'll change the engine fan back to standard wiring. I'll also put LED indicators on bothfans so I'll know when each fan is on.

Anyone know what the standard turn on temp for the engine fan is???

So
If an oil cooler is the go - what size, what size hoses, and where do I connect it???
Blue Chilli

[Okibi]

On the NB I think the fan kicks in at 210"F

[Wuey]

In my previous NA, the second fan will only turn on when the a/c is switched on. In my SE, both fans will turn on irregardless of whether I have the a/c switched on. Can any SE owner please confirm this?

[timk]

In my previous NA, the second fan will only turn on when the a/c is switched on. In my SE, both fans will turn on irregardless of whether I have the a/c switched on. Can any SE owner please confirm this?

The SE can run the fans at two different speeds. It always uses both to do this.

[timk]

- Bonnet vents

You have to be careful with the placement of this as you may find that with the pressure difference, air will enter backwards INTO the vent and raise the pressure behind the radiator undoing the work of the undertray and making it harder for air to flow through the radiator itself.

[Wuey]

Thanks for your confirmation sab.

[davekmoore]

Thanks for all the thoughts. Oil cooler and filter relocation kit go on next week in time for summer. At last!

Slightly confused about making the fans work together. As the car is an SE do they both fire up automatically and at full speed and at a low enough temp? If not, can I get the wiring changed so they do that?

[timk]

Slightly confused about making the fans work together. As the car is an SE do they both fire up automatically and at full speed and at a low enough temp? If not, can I get the wiring changed so they do that?

They both fire up together, but initially at the low speed. If you put the A/C on while the thermofan is running or the car gets over a certain temp, they will kick in at the higher speed.

[davekmoore]

Slightly confused about making the fans work together. As the car is an SE do they both fire up automatically and at full speed and at a low enough temp? If not, can I get the wiring changed so they do that?

They both fire up together, but initially at the low speed. If you put the A/C on while the thermofan is running or the car gets over a certain temp, they will kick in at the higher speed.

Thanks for that.

So is there any point in changing any of that?

[timk]

I wouldn't have thought so but decide for yourself.

[93_Clubman]

Dave, I wondered how you went with this issue - hopefully the combined approach will sort it.

[davekmoore]

Dave, I wondered how you went with this issue - hopefully the combined approach will sort it.

Will report when completed. Soon, I hope.

[bjones]

For a haltech E series, goto the main setup and select ignition map. There is an adjustment called Ignition Trim. To take timing out, enter a number such as -1.0 - this will take 1 degree of timing out across the entire ignition map.

Make sure you save the map before you do this. And find a decent Haltech tuner.

Also, the turbo cooling checklist is this:
- Oil Cooler
- SE thermostat
- both fans running in parallel
- coolant re-route
- higher pressure radiator cap
- bigger alloy radiator 40+mm
- 33% glycol coolant mix
- directing air to the top of the radiator and not through the intercooler
- decent intercooler design - not china-ebay ones
- fully fitted under tray
- fully ducted air to the cooler and radiator from the front bumper

My race car has all of these and can run 1bar boost at 8000rpm in 40degree heat and runs perfectly.

Thank you

Cant agree more with CT (except for the street Id go this way - well I have and I think I have the most radical setup here)

Also, the turbo cooling checklist is this:
- Oil Cooler --THIS is the best thing you could do along with brand new bigger capacity lines to feed it, add more oil ;-) ALSO dont mount it in the engine bay!!!!! the rear of the car is the best place for it , we found leave the big rad in more water cooling, route oil cooler to rear of car, more oil on board more oil to heat up more to cool also more efficient using the under car air flow mounting is critical not to damage it though......take airflow and fluid dynamics into account
- SE thermostat
- both fans running in parallel helps BUT for track days only on the street not needed
- higher pressure radiator cap from pwr also
- bigger alloy radiator 40+mm PWR do a great one!!!Especially designed for the NB8B turbo application I should know we helped get it right
- 33% glycol coolant mix
- decent intercooler design - not china-ebay ones (DEFINATELY NO CHINESE ONES)
- fully fitted under tray -Not needed unless you plan on hitting the kitty litter standard one works fine
- fully ducted air to the cooler and radiator from the front bumper (cutting holes into bumpers works BUT looks crap on a street car) get your inlet air from outside of the engine bay to start with


My 2c worth

BJ

[davekmoore]

Good on ya BJ