oil coolers

[shmivic]

are the worth using on high comp na motors?
and can someone varfiy that you might need to change the thermostat from an 86 deg C to a 71 deg C item
i have a 19 row earls aircraft oil cooler

[tofu R]

Yes they are worth getting on ANY motor .. regardless of high comp,na, turbo, stock
whatever..

if you drive your car hard.. in any way shape or form .. this is cheap insurance ..

as far as thermostats are concerned .. i spoke to earls directly .. and dealt with them quite a bit.. as I did a group buy for clubrsx from earls myself ..
and they recommended that i didnt waste my money on getting a thermostat on the sandwich plate.. because i live in sydney.. etcetc.. the thermostat should only be necessary ... IF you live in areas with snow ..

and i believe the information from earls.. as they wouldve earned more if they got me thermostats .. but they told me otherwise..

anyway .. i have a 16 row oil cooler myself..with no thermostat.. the only "downside" is you may not be able to hammer your car for the first 5-10 minutes of driving.. which is normal anyway..

[tofu R]

driving normally in the current weather .. my temps sit around 65-75 max..

when i hammer it .. it goes to 90ish..

Yet to track it with the temp gauge..

[steve]

One of my friends has just finished building a high output rb26(300rwkw+),and another friend a 250rwkw+ rb25, when building they both contacted many hi-po workshops inc advan and bd4's and in nearly all cases they were told NOT to run oil coolers for street purposes.

Basically, the oil coolers cool the oil too well in street driven situations and do not let the oil reach optimum oil temp.
While i kno these engine are not N/A they are still high revving and thermal(heat) stress is very high due to boost.

So i guess, unless your going to track it hard, dont bother
Hope that helps:)

[CoZZm0]

One of my friends has just finished building a high output rb26(300rwkw+),and another friend a 250rwkw+ rb25, when building they both contacted many hi-po workshops inc advan and bd4's and in nearly all cases they were told NOT to run oil coolers for street purposes.

Basically, the oil coolers cool the oil too well in street driven situations and do not let the oil reach optimum oil temp.
While i kno these engine are not N/A they are still high revving and thermal(heat) stress is very high due to boost.

So i guess, unless your going to track it hard, dont bother
Hope that helps:)


which is why thermostats are used to ensure the oil keeps a decent temp even in the coldest conditions.

[ctn]

One of my friends has just finished building a high output rb26(300rwkw+),and another friend a 250rwkw+ rb25, when building they both contacted many hi-po workshops inc advan and bd4's and in nearly all cases they were told NOT to run oil coolers for street purposes.

Basically, the oil coolers cool the oil too well in street driven situations and do not let the oil reach optimum oil temp.
While i kno these engine are not N/A they are still high revving and thermal(heat) stress is very high due to boost.

So i guess, unless your going to track it hard, dont bother
Hope that helps:)

The oil doesnt flow through the oil cooler when the oil temp is low if it's has a thermostat.

[steve]

fair enough, but those workshops wouldn't have said that for the fun of it.

Anyway just passing on some experience:)

[Zimp13]

The oil doesnt flow through the oil cooler when the oil temp is low if it's has a thermostat.

huh? i dun think thats rite though... the oil will circulate through the oil cooler regardless of the oil temp... correct me if i m wrong... :confused:

[CoZZm0]

huh? i dun think thats rite though... the oil will circulate through the oil cooler regardless of the oil temp... correct me if i m wrong... :confused:

the oil flow through the cooler with a thermostat is cut down to like 10% of regular flow (depends on the thermostat mechanism) until the thermostat reaches its opening temperature.

(if you shut it off totally it can create air pockets and stagnate the oil).

[tofu R]

well what is operational temperatures??

as i said .. with the oil cooler and temp gauge .. my oil is sitting between 65-75 cruising around ..
which is optimal temperatures..
if you dont have an oil cooler your oil will constantly be at 85-95 degrees plus..


and the thermostats are "good" or used only for the period of warming up the car..
theres nothing special about them ..
the Greddy thermostat is at 35 degrees..

ur car will NOT drop lower than 35 degrees at ANY TIME if you live in australia..

Since you guys love it so much.. Toda adrian also agrees with this ..

[blackdc2]

driving normally in the current weather .. my temps sit around 65-75 max..

where is your oil temp sensor located?

[BiGANG]

Tofu R, what did u end up paying for the earls cooler? was it a full kit with lines and oil filter relocation or just a core and u got someone to cut lines to suit your car?

[incoming]

i was under the thought that vtec runs on oil pressure AND oil temp?

like when u start ur car oil temp is low. thus vtec doesnt engage..
wouldnt running an oil cooler on street (daily driving) be bad for vtec motors?

i was told by a mechanic for my bro's turbo ae86 when he drives on street, to block the oil cooler with cardboard as well

edit: sorry i just noticed he was talking about high comp NA motors and not normal motors

[wynode]

oil cooler won't drop your oil temp that much that VTEC won't engage. But despite that, VTEC engangement is governed by the coolant temp and not oil temp AFAIK.

[tinkerbell]

well what is operational temperatures??

if you dont have an oil cooler your oil will constantly be at 85-95 degrees plus..


my uncooled oil temp hits 115'c on the freeway at 110km/h

and has been over 137'c on the race track...

and sits around 100'c in normal suburban driving, with the temp sensor in the sump...

steve - can you ask the workshop what an *optimum* temperature is?

[tinkerbell]

wyn - yes, it is coolant temp... not oil temp

[fatboyz39]

A oil cooler will insure the engines life.

Pretty cheap considering a engine cost 4-5k.

If the oil temp is low for street, then block the unit off with cardboard or plastic.

When tracking or hard driving take it off :) :)

[steve]

steve - can you ask the workshop what an *optimum* temperature is?

Well like i said, neither engine is mine, nor did i build either of them or have any communication with the workshops at all, so i think i would feel abit out of place...

I'm sure if you pm Toda or other established engine builders they should be able to tell you:thumbsup:

[tinkerbell]

awwww, steve, you seemed so confident, dont back out now...

[steve]

Not once did i claim to kno what optimum oil temp was...
Nor did i claim to kno much about the finer workings of oil cooler systems...

I simply stated my experience with oil coolers and there suitability for the street.

That and the fact that these renowned workshops recommended not to bother with external air to air oil coolers for street use:rolleyes:

[Slow96GSR]

Just so you know thay make a thermostat switching unit for the oil coolers. You get that in and when the oil temp gets hot enough it opens and starts to cool. Nicest part of the cooler it the filter relocation! Imo I'd get the oil cooler and the Thermostat valve and hook it up.

[tofu R]

Tofu R, what did u end up paying for the earls cooler? was it a full kit with lines and oil filter relocation or just a core and u got someone to cut lines to suit your car?

Hey mate...
ended up paying about $660-$675 for the oil cooler

its not really a kit
but has all the parts for a kit
pretty easy to install etc

we bought it in a group buy with 5 of us ..

we got all the fittings
a 16 row oil cooler
4.1M of line
sandwich plate

all earls parts.
i ended up getting a trade discount .. and now have an account with them .. if anyone wants an oil cooler . hit me up .. and ill see if i can arrange trade price for ya!

[tank]

The optimum engine oil temperature that your oil will be most efficient in protecting your engine will depend on the type of oil you are running.

synthetic or mineral
0W-40 or 10W-30 or 10W-40 or 20W-60 etc
eg. 20W-60 will have the highest operating temperature of the above ranges

Just run the apropriate temp range synthetic oil on the street and light track work. No oil cooler needed.

On a race track, your tyres or brakes will give up before your engine oil.

[tinkerbell]

On a race track, your tyres or brakes will give up before your engine oil.

WTF?!?!?!? :confused: :confused:

[Ronin 09]

One of my friends has just finished building a high output rb26(300rwkw+),and another friend a 250rwkw+ rb25, when building they both contacted many hi-po workshops inc advan and bd4's and in nearly all cases they were told NOT to run oil coolers for street purposes.

Basically, the oil coolers cool the oil too well in street driven situations and do not let the oil reach optimum oil temp.
While i kno these engine are not N/A they are still high revving and thermal(heat) stress is very high due to boost.

So i guess, unless your going to track it hard, dont bother
Hope that helps:)
?
I have a 280rwKW GTR and without a cooler oil temps hit 90-100 on the street.
I think if you shoot over to www.skylinesaustralia.com you'll find that virtually any serious RB25 or RB26 runs a cooler.

[madgrk]

if you dont want to run a thermostat on your cooler, the tightass method is to place a bag over it so it doesn't cool your oil as much.

steve - Ronin 09 is correct. Most GTR's etc (and nearly any other high performance vehicle these days) run oil coolers to ensure you get optimum cooling all the time. It's not a wank factor (yet), but for high power street cars it's a good idea to have. :)

[Ronin 09]

there's a good thread about engine / oil temps over there (http://www.skylinesaustralia.com/forums/index.php?showtopic=101201&hl=)

particularly this post (http://www.skylinesaustralia.com/forums/index.php?showtopic=101201&view=findpost&p=1852701)

Cheers

[tofu R]

WTF?!?!?!? :confused: :confused:

WTF X 2!!!!

[fatboyz39]

.............

[fatboyz39]

.....

[DC2typr]

The oil doesnt flow through the oil cooler when the oil temp is low if it's has a thermostat.




not all the time though, i have an oil cooler on one of my cars and the thermostat is rather clever. it always allows some flow (around 5%) through the core of the cooler, this helps keep all of the oil in your engine/cooler at an even temperature. So that when the oil has reached a temp where it needs cooling and the thermostat opens completely your engine is protected against cold shock.

imagine heating up the engine, then bang opening the thermostat to let the cooler kick in, all of the oil that was sitting in the cooler is ice cold running that through your motor is not good at all.

cheap thermostats are worse than no thermostat.


Greg.

[hugo]

what size oil cooler sandwich plate are you guys using??
3/4x16 or M20x1.5 ?
i need M20x1.5 for my honda with 2 ports for gauges.

[tinkerbell]

the thread on Honda oil filters is generally m20x1.5

:thumbsup: