Tuesday, January 19, 2010 - 10:16 am, by: Peter Nitschke(Pen)
I would suggest before the radiator.
That way the radiator can help heat up the trans fluid when it's cold, and the cooler will take a bit of load off the radiator when the trans is really hot.
Someone may have a argument for why the other way is better.
Tuesday, January 19, 2010 - 07:22 pm, by: Daniel Clarke(Dieseltrain)
Well its been dragged pretty hardcore over the years and has done me for 70,000kms since ive had the car . Now up to 190,000kms and counting so im not going to fault it
Peter Nitschke Junk Filterer South Australia UZZ30 UZZ31
Thursday, January 21, 2010 - 08:15 am, by: Brian Rignall(Cashmere)
For various build cost / repair cost and other reasons, you find that the majority of manufacturers install the oil coolers in front of radiators. They are smaller and allow air to flow back over the radiator.
Specialist builders, who are not building to cost, may install the oil coolers below the radiator, or to the side of the car.
Which way is better? Well they both work!
The Soarer has space to include additional coolers at the side of the radiator, just a bit more fiddly getting on to fit.
Thursday, January 21, 2010 - 09:24 am, by: Rhys Salmon(1jzt04)
Thanks Guys, i will be installing it as a side mount. Was refering more to prior to oil going into radiator or after oil has gone through the radiator.
I think i tend to agree with Peter, not built for Drags.. just a regular old road flogging.. Do alot of road trips so really want to try and take some work off the radiator as i am having slight overheating problems at the moment anyway.
Thursday, January 21, 2010 - 04:10 pm, by: Nathan Cryer(Redrodeo)
Water is better at absorbing heat than air, therefore the additional cooler should be installed after the radiator. The radiator will take the initial heat from the oil and then the air cooler will work more efficiently.
Peter Nitschke Junk Filterer South Australia UZZ30 UZZ31
Thursday, January 21, 2010 - 09:10 pm, by: Peter Nitschke(Pen)
I don't even know where to begin picking holes in that statement!
The "water" in question, is actually normally at 85 degrees, would that be better at removing heat than air at less than 40 degrees?
You get greater efficiency when the temperature difference is greatest, so the additional cooler would actually lose more heat if the fluid inside is hotter.
Plus the previously mentioned benefit of reducing the load on the cooling system etc.
Saturday, January 23, 2010 - 06:45 pm, by: Peter Nitschke(Pen)
I think the gearbox is designed to work around the 85 degree point. The radiator would only heat it if the ATF is already cooler, which is probably unlikely if you are working the gearbox hard.
I can see your point too, that the onboard cooler works well most of the time, so the strap-on just knocks it down some more.
It would be interesting to get some actual measurements of the temp out of the gear box and then in/out of each cooler.
Tuesday, January 26, 2010 - 05:44 pm, by: Nathan Cryer(Redrodeo)
Why do cars come with only a radiator cooler from the factory and not an air cooler? If air was so efficient why wouldn't they use an air cooler???
The normal operating temp for an auto is 215F or 101C. So running the oil through the radiator at 85C can take 16C out of the oil before going to the air cooler.
Yes it also helps with heating the oil initially to bring the box up to operating temp faster.
For every 11C over 101C you halve the life of the ATF. By installing a second cooler you also increase the overall oil capacity that also helps keeping it cool.