Jump to content
SAU Community

Recommended Posts

  • Replies 172
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

Probably.

Low temp thermostats are not a good idea. I do not know why they were invented or people think that they are a good idea. An engine is supposed to operate at a certain coolant temperature, otherwise the heat losses out to the cooling system increase (if you run it colder) and fuel consumption goes up. You also get more thermal stress between the hot side and cold side of parts of the engine. You certainly wouldn't change to a colder thermostat without tuning the ECU to stop it from (possibly) winding in some cold coolant enrichment.

You have to face facts. A low temp thermostat only changes one thing. That one thing is the point at which it starts opening. Once it is fully open, it is fully open the same as a hotter thermostat is. So if you have trouble keeping an engine cool (say when thrashing it), then the cooler thermostat will be wide open, same as the normal one would. They simply don't play a part in the heat balance of the engine once it is actually hot. If the cooling system is otherwise unable to cope with the heat produced by the engine, then a cooler thermostat can't help.

The only thing it does do is give you a little more grace between cruising it (cold, at 70°C) and when it gets too hot. If it will stay at, say, 95°C with a cooler thermostat, it should do so with a normal one too.

KeepIng in mind these cars were designed and built to be driven in Japan and not the hot climate of north QLD that is why I went with the low temp thermostat and am very happy I did.

Why? The only real difference is your heater will start working a bit quicker.

Cleaning out the radiator probably played a large part in dropping the temps. The thermostat openin earlier helps keeps temps down as the coolant starts circulating through the system earlier. But yes once it is all hot and all things being equal I can not see the thermostat changing anything.

Probably.

Low temp thermostats are not a good idea. I do not know why they were invented or people think that they are a good idea. An engine is supposed to operate at a certain coolant temperature, otherwise the heat losses out to the cooling system increase (if you run it colder) and fuel consumption goes up. You also get more thermal stress between the hot side and cold side of parts of the engine. You certainly wouldn't change to a colder thermostat without tuning the ECU to stop it from (possibly) winding in some cold coolant enrichment.

You have to face facts. A low temp thermostat only changes one thing. That one thing is the point at which it starts opening. Once it is fully open, it is fully open the same as a hotter thermostat is. So if you have trouble keeping an engine cool (say when thrashing it), then the cooler thermostat will be wide open, same as the normal one would. They simply don't play a part in the heat balance of the engine once it is actually hot. If the cooling system is otherwise unable to cope with the heat produced by the engine, then a cooler thermostat can't help.

The only thing it does do is give you a little more grace between cruising it (cold, at 70°C) and when it gets too hot. If it will stay at, say, 95°C with a cooler thermostat, it should do so with a normal one too.

True if you assume you are running the std clutch fan. If you are runner running electric thermometer fans with a smart controller or Ecu then it means the the temps run in the sweet range of 75-80 with less effort/strain on electrics and thermometer fans

True if you assume you are running the std clutch fan. If you are runner running electric thermometer fans with a smart controller or Ecu then it means the the temps run in the sweet range of 75-80 with less effort/strain on electrics and thermometer fans

I'm not even sure if that's true. But whether it is or not, it doesn't realy have anything to do with the thermostat, does it?

Motul mocool

http://item.mobilewe...Id=221050536902

What do you guys think of the stuff?

i use redline Water Wetter. its good stuff, temp gauge has never gone above half on the haltech temp reads 80 even after multiple power runs on the dyno!

http://www.redlineoil.com.au/product-information.asp#waterwetter

This is where and how I usually do undercar cores. These are hollinger and rear diff coolers but could be used as fuel coolers as well. Simple duct that limits the chances or rock damage, Dont ever put a cooler behind a wheel obviously. post-20349-0-91966300-1357858761_thumb.jpg post-20349-0-96058100-1357858763_thumb.jpg Those coolers have probably seen more of a beating than any GTR ive ever seen and they havent really taken any massive rock strikes, they do accumulate debris from the circuit and require constant cleaning out with an air blower to keep tire rubber and dust out of the cores.

where can I buy little cores like those? I'm about to do this know..

or maybe, do you sell a kit with cooler, shroud, mounts etc?? ;) theres an idea

Im not hell bent on a PWR no. But as far as i know they are one of only few if not the only place to get a direct fit to siit an R31.

Im pretty sure an R33 unit will fit but it sits lower and needs new brackets made up. The brackets are easy but the sitting lower part is a concern.

If i do end up with a thermo fan it will be a spal only.

Does anyone know of other very good rads to suit an R31? Obviously a cross flow twin or triple pass would be a good option. Im fairly sure the PWR units are vertical single pass.

It shouldn't cost you any more than $60-$100 to have the mounts modified by a reasonable fabricator. I had a Race Radiators (they are in Melb) item for a R33 modded to fit my GTS-R back 7-8 years ago and it wasn't really an issue, quick/easy.

So buy the Racepace one, have modified, pocket the difference and spend on other things :)

Stock starts opening at 75deg so either your gauge is wrong, your thermo is stuck open or you have a low temp one

I tried two brand new standard Nissan R33 ones in my GTS-R years ago, and on a cool day (under 15) it wouldn't go above 72, hovered around 70 usually :)

Two of them couldn't possibly be stuck (or the 3rd which it started with). So some certainly can run under 75 - either that or the sensor was out :merli:

I tried two brand new standard Nissan R33 ones in my GTS-R years ago, and on a cool day (under 15) it wouldn't go above 72, hovered around 70 usually :)

Two of them couldn't possibly be stuck (or the 3rd which it started with). So some certainly can run under 75 - either that or the sensor was out :merli:

God knows, but every reference I can find (Nismo, Sard, Billion etc) all claim that factory ones start to open at 75.

Either way my new one should be cooler than it is now when cruising, which will start the engine cooler and take longer to reach "hot" temperature when at the track. As I'm not going to be doing endurance races, it suits my application perfectly :)

Edited by SimonR32

It shouldn't cost you any more than $60-$100 to have the mounts modified by a reasonable fabricator. I had a Race Radiators (they are in Melb) item for a R33 modded to fit my GTS-R back 7-8 years ago and it wasn't really an issue, quick/easy.

So buy the Racepace one, have modified, pocket the difference and spend on other things :)

Yeah i did find a post of yours about you fitting a racepace unit. But i was sure they didn't make them for the R31 so i wondered if you had fitted an R33 unit.

So Racepace is comparable to other high end radiators?

What is yours? Cross flow or vertical flow? twin or triple core? Are you using the clutch fan with i assume R33 shroud on your GTS-R? What size cores do they offer?

The other question i guess is do i keep the clutch fan with a smaller core or go with a bigger core, ditch the clutch fan and shroud and go for a spal 16"er

Yep Racepace were using PWR, but then sourced their own which is just as good as a significantly lower price point. Performance is the same (email them for more info: [email protected])

The 31 had a Race Radiators (Melb mob). Was a R33 unit as i purchased off a mate - so not really talking apples/apples here as it was 7-8 years ago and i don't own the GTS-R anymore so I'd only be guessing what core.

I can tell you it had the R33 shroud and clutch fan, and it was cross flow (just cant remember the cores). The shroud was slightly trimmed but nothing major really. 31 item might well fit as well with the same trimming.

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

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...