Oil cooler study , with or without thermostat?

[AE112R]

Hi guys,
Been thinking to upgrade my oil cooler on the AE112R to aftermarket ones. Not to say genuine Toyota not up to job but looking to upgrade it so that I can run turbo oil feed, oil temp guage using the sandwich plate provided in the kit.
After some "google" I found a interesting article posted by Ozhonda member, below is the link

Oil cooler study, with or without thermostat?

There is not much difference between the 2. What do you guys think?

[webby]

Don't run a full flow on the street. I'm running a full flow cooler with -10AN lines on a 4age. temp only get to 70deg C on the street. On the track though is a different story.

[Billzilla]

Use a water-to-oil heat exchanger, they are better in just about every way. One like off a 3SGTE would work fine.

[mullett]

Like the factory ones Bill? Like a sandwich plate before the filter with water lines...or is there an external option?

-RM

[asimovy]

The factory water-to-oil cooler on my 3sge isn't much good on the track, oil temps get up to about 135-45 after maybe 7 or 8 laps.

I don't know what my water temps are like though, the factory gauge never gets over half way but this probably isn't all that accurate.

Pretty much all the serious 3sgte builds i've seen take the factory cooler off and use an air cooler.

[Billzilla]

Like the factory ones Bill? Like a sandwich plate before the filter with water lines...or is there an external option?

-RM

Yep, though as mentioned above they aren't good with sustained high-power, maybe a WRX cooler like I use on my racing car.



A little bit of fiddling to get it in there but it's well worth it.

[Celica RA45]

i use the std altezza 3sge oil to water with a mechanical sender in the metal sump and after 12 laps at sandown it will be only sitting around 100c ,i have ran the car at wakefield as well about the same temp
on a hot day at winton mid to high 30 c days ,goes up to 120 .
when i had the dry sump set up on the oil temp was always higher .,more friction with external pumps and lines with a 20 row cooler go figure

[Bazda]

You can use a full flow oil cooler with no thermostat, you would prob need a cover for street use so it gets up to temp better.
Thats what I do anyway. Once you get to the track, take the cover off.

[Supra967]

No experience running one yet, but for cost comparison I held out and found a G-rex thermostat sandwich plate, trust cooler and speedflow lines/fitting for from a race car for less than the cost of a china spec relocation kit without thermostat.

I was about a week off buying the china one too. Really happy with what I got though, nice solid plate and the cooler is a moster.

[marvis]

I run grex sandwich plate with thermostat, -10 lines and FC oil cooler.

Thermostat win.

[trdee]

I use an FD RX7 oil/air cooler mounted off my rear bumper. has its own inbuilt thermostat... easy peasy.

EDIT;

[love ke70]

dont you get concerned about stones off the rear tyre hitting that?

[AE112R]

Hi guys,
Thanks for all the replies. Using cloth to cover the cooler in a full flow kit sounds simple and yet effective. At least it is a fail safe system as thermostat sometimes will get stucked and the oil will never get its way to the cooler at the end. For a full flow system, what size of the braided hoses should I use? -AN8 or -AN10?

[trdee]

dont you get concerned about stones off the rear tyre hitting that?

Making a shroud for it.

Hi guys,
Thanks for all the replies. Using cloth to cover the cooler in a full flow kit sounds simple and yet effective. At least it is a fail safe system as thermostat sometimes will get stucked and the oil will never get its way to the cooler at the end. For a full flow system, what size of the braided hoses should I use? -AN8 or -AN10?

Should go -10. I have -8 lines and am a bit worried that they may not flow enough.

[oldcorollas]

A)water to oil heat exchanger is fine for cooling the oil, IF you have enough cooling capacity in the water system.

B) or you could run a thermostat with oil/air cooler only..

C) or, you could run a full flow air/oil cooler, then through a water/oil heat exchanger, to warm up or cool down the oil before going back into engine.
this is useful as the water temp is more easily controlled, but only needed if your water cooling does not have extra heat rejection capacity to use A). it should also heat the oil up faster.. it's not useful if you want to run your oil and water at significantly different temps.

regarding the original article, perhaps the oil cooler was not positioned well, or he was not driving it hard enough for any major difference to occur.