Average Temperatures For Rb25 With Gtr Mfd

[tiddyd]

Hey everyone, I've been searching around on the forum, but have only managed to find bits and pieces on the topic but anyway,
I have an R34 GT-T with a GTR MFD on it, and I was just wondering what temperatures I should be reading when driving normally, and when under boost for the following things:

Oil temp, water temp, exhaust temp, and, intercooler temp.

Basically what temperatures are safe, and what's not. Sorry if this has been asked before, but I couldn't find it specifically.




Thanks!

[Badgaz]

think for r34 neo motor 90 degrees water temp is normal. i'd probably start to worry at 100-120degrees.

[GTSBoy]

Yup. And my oil temp runs very close to water temp most of the time, although will climb above 100 in traffic, on really hot days and/or if I'm giving it some treatment.

My exhaust temp, pre-turbo, is about 500°C cruising, up to 900°C when absolutely caning it, with intermediate load levels coming in at the temperatures in between.

[tiddyd]

Okay cool, 90 degrees sounds like the norm for neo engines then.
From what I was reading earlier most people were below 90, so that had me worried a bit. So cheers for that!

Anyone know about the intercooler temperatures though?

[Badgaz]

Depends which side the measuring is taking place... Ideally both sides.... But I guess depending how hot the turbo blows + ambient temps is what should be normal....

[GTSBoy]

Will depend on what turbo, what intercooler, what boost and which end of the intercooler the temp sensor is in.

Edited November 27, 2014 by GTSBoy

[tiddyd]

It's currently running .6bar on the stock turbo, and a Blitz FMIC, and I'm fairly sure the temp sensor is on the exit side of the intercooler.. (I could be wrong about that bit)

[GTSBoy]

Right, well. Keep in mind that the temperature rise on the turbo (if running efficiently) at 1 bar is about 100°C. This goes on top of ambient temp. So your intercooler inlet T is probably 75°C or so. That cooler is probably well big enough to drop most of the heat out of teh charge air even on a decent 3rd gear pull to redline, so you'd probably see 30°C or so at the outlet.

But it's as rough as guts talking about this stuff because it depends so much on the ambient temperature, how well ducted the cooler (external) air flow is, the mass of the cooler vs the power level being run, etc etc.

[tiddyd]

Okay yeah that would make sense, when I drive it around I see cooler temps of 40-58 on a warmish day, so I guess that's completely normal too.
I'll take it out for a bit tonight when the air is a bit colder and see what it's like then.

Cheers for that though!