Oil cooler size

[dub-disaster]

I took my bumper off today and saw my oil cooler is tiny it's around 200mm square . I am currently going turbo is it worth upgrading the oil cooler to a larger siz?
Secondly where's the best place to put it as I have taken my fog lights out and it is placed on the passenger side of the car in where the foglight used to be but this hole isn't very big and if I want a bigger cooler won't it need to be more openly mounted so it can get more airflow too it?
Just been having a look and I think it maybe a 16 row one that is 115mm core size, there are some bigger ones on eBay for about a tenner should I upgrade to a bigger one or will it still be the same due to the size of the hole where the fog light used to be? Is there any other places other than the front if the bumper (intercooler going here) where I can mount it for good airflow on a larger cooler??
What's other peoples setup ??

[vwmk3jon]

Mines mounted at an angle behind the passenger fog hole with 'speedholes' in the plastic arch liner to channel the air. Got the cooler off ebay for £24.50

[dub-disaster]

Speedholes hmm sounds intresting ! Gd idea though mk4 golfs used to do this to aid airflow around there standard side mount intercoolers,they used to fit and still mite either drill holes or fit Audi tt arches wich had slats.

[breadman]

Second hand prices of 115mm coolers tend to be more expensive, partly due to they're not being very common.
A typically sized cooler that IMO is ideal for a turbo conversion would be the "normal" 235mm x 13 row. These have a capacity of 0.26 litres, a 115mm width 19 row has 0.23 litres. Personally I think the 115mm x 16 row with just 0.19 litre capacity would be too small.
For all this, you do have to weigh up the available airflow. Unless you are prepared to remove lots of the bumper and modify the existing radiator and new intercooler mounting points you'll never get the best out of what you fit.
If you want to do it properly, I'd remove the bumper and it's mounting bar and refabricate everything to fit where you want it. Then modify and chop the bumper about to fit over it all allowing as much airflow to get to the radiators as possible. Don't forget to duct everything to help  direct the air and so that heat can escape from behind too.

[Andy]

What turbo are you using? If it's watercooled and oil cooled (e.g. K03) then what you've got will probably be okay - most of the extra heat will be dumped into the coolant water...
If it's just an oil cooled turbo then I'd go for a much bigger jobbie.
Get an oil temp gauge and try what you've got - if you have oil temp issues, then go bigger.

[dub-disaster]

Cheers for the advise guys have been most helpful, what sorta oil tempreture range shouldni be looking for what's normal and safe operating tempreture for oil??