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R34 3076R Running Temps

GunmetaL

By GunmetaL,
in Engines & Forced Induction

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jrm Veteran

jrm

Posted
Posted

Buy yourself and r32 RB20 thermostat from Nissan. They are 76deg.

Cheaper upgrade than a nismo one.

I have one in my NEO as the running temp was around 90 deg.

Now it sits on 80deg

Wonder if it's affected your fuel economy .. I only say because I recently had my thermostat replaced - now running rock-solid at 88-92C and my fuel economy seems to have improved. Previously it was sitting lower generally but would also spike higher on 35-40C days stuck in traffic.

simpletool Mentor

simpletool

Posted
Posted (edited)
Do you have evidence to back up your scaremongering?

I agree that if you're reaching 95deg after a couple of hard jaunts up to 100kmh there is an issue that likely needs to be addressed.

Telling people that reaching 95deg is OMG GOING TO REDUCE THE LIFE OF EVERYTHING THE COOLANT TOUCHES, is scaremongering.

or chemistry :whistling:

I didn't say everything the coolant touches, just almost everything. And I didn't say that magically over 95° will cause damage and under will not. I said every 10° doubles the wear. It's not like running at the designed temp there is no wear because there is still wear! Running 10° hotter doubles that wear. Running 20° hotter means x 4. (Not that the temperature is evenly distributed in the cooling system though)

Anyway....just adding a tid-bit of info for interested parties. new-engine.pdf

Edited by simpletool
Hanaldo Grand Master

Hanaldo

Posted
Posted

or chemistry :whistling:

I didn't say everything the coolant touches, just almost everything. And I didn't say that magically over 95° will cause damage and under will not. I said every 10° doubles the wear. It's not like running at the designed temp there is no wear because there is still wear! Running 10° hotter doubles that wear. Running 20° hotter means x 4. (Not that the temperature is evenly distributed in the cooling system though)

Anyway....just adding a tid-bit of info for interested parties.

Only over a certain temperature though. It doesn't double wear when it is perfectly within it's operating temperature. Running at 95 degrees compared to 85 degrees isn't doubling the wear on everything.

Scradly Community Regular

Scradly

Posted
Posted
Wonder if it's affected your fuel economy .. I only say because I recently had my thermostat replaced - now running rock-solid at 88-92C and my fuel economy seems to have improved. Previously it was sitting lower generally but would also spike higher on 35-40C days stuck in traffic.

Thats why the NEOs run a higher temp thermostat. The hotter they run the lower the emissons are/ the better the fuel eco is, which is good for the environment but shithouse for performance.

Most modern cars now will run between 90- 100 deg for that very reason.

jrm Veteran

jrm

Posted
Posted

Thats why the NEOs run a higher temp thermostat. The hotter they run the lower the emissons are/ the better the fuel eco is, which is good for the environment but shithouse for performance.

Most modern cars now will run between 90- 100 deg for that very reason.

I find it difficult to believe that because they're running at this higher temperature - and designed to - that they're suddenly causing much much higher rates or wear and going through things like water pumps quicker.

Pulled my water pump out for 100,000km service recently (I have no way of knowing if it was previously replaced, sure) and it looked almost like brand new.

bubba Grand Master

bubba

Posted
Posted

Bubba.....seriously. :/

I've been playing with RB's for a while now dude, and I am yet to see the issues you are stating. I'm not saying they DON'T happen, I'm just saying it's probably not as dire as you are making out.

As I agreed with above, if you're hitting 95deg after a quick blat to 100kmh then yes, you have a problem but it's not going to cause everything to fall apart from pitting and corrosion.

Basically, regular fluid maintenance (which coolant is a part of, and something everybody should be doing) will help everything live a (hopefully) long and uneventful life.

Ignore your fluid changes for several years, and yes, you will likely see a massive deteoriation in cooling system components. The lack of maintenance, even at normal operating temps, is going to do a lot more damage than running it hotter but changing fluids more often.

bubba Grand Master

bubba

Posted
Posted

I only stated that the reason temps are higher now days is puerly to lower emissons.

Spot on.

And conversely, you get rather poor fuel atomisation at lower temps so unless your inlet tracts and combustion chambers have been designed to run at ~60deg, nobody should be using one of those low temp thermostats.

simpletool Mentor

simpletool

Posted
Posted (edited)

I agree, no need for low temps thermostats.

Look, I never meant that there is some dire problem. Just thought that since we are all driving 10+ year old cars then we should be aware of increasing cooling system corrosion (heater cores for instance). It is also a problem if you don't change coolant.

People can disagree with the science if they want, I was just giving some extra info.

Edited by simpletool
75coupe Grand Master

75coupe

Posted
Posted

+1 I'd rather go with a genuine thermostat.

chinese parts do not always mean rubbish

your joking right? not there is a need for the op to get a low temp thermostat.

but where do you think most parts come from anyway, its a simple thermostat... most car manufacturers are probably using chinese made parts... its not a precision part

bubba Grand Master

bubba

Posted
Posted (edited)

chinese parts do not always mean rubbish

your joking right? not there is a need for the op to get a low temp thermostat.

but where do you think most parts come from anyway, its a simple thermostat... most car manufacturers are probably using chinese made parts... its not a precision part

wut?

I already said no need for a low temp thermostat, and I didn't say chinese stuff is shit but as far as chinese made goods go you DO pay for quality. That is the only difference in chinese made goods, from the same factory you can have good or crap stuff, depending on how much you're willing to pay for the quality control. I deal with chinese manufacturers and fabricators a fair bit (albeit for much larger scale stuff) :)

Edited by bubba
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Hey all I have just purchased a an r34 sedan car has a 3076r with all supporting mods (fmic, inj, afm etc)

Also has a "heavy duty" radiator.....it has standard top tanks but core looks to be about 40 mm thick (standard is around 15mm)

when driving normaly the temp sit in the middle of the of the factory gauge (my other standard r34 sits in the same place)and the aftermarket gauge which is in the top radiator hose sits about 100 but when I drive it a little bit hard ie full boost a few times up to 100km or so it heats up to about 110 120t is this normal to have quite vast temp changes with such little hard driving or am I being paranoid?

Im only worried because my old silvia had a similar set up but ac was removed and had a thick koyo radiator temps never went above 90 on a 30 degree day no matter how hard I drove it

should I look at getting

transmission cooler

oil cooler

alloy radiator ?

any imput would be apprecated thanks Ben

who tuned the car?

what ecu? do you have a dyno sheet with afr?

might need to be richened up a bit to help keep combustion temps down

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