Charge cooler radiator upgrade repocussions..??

Hi Guys, we are currently busy to build an Alfa Giulia QV (2.9 v6 Twin turbo). We want to race the car in our local endurance series wich is in South Africa. During tesing we noticed that the car is pulling boost due to high charge temps. The current charge cooler radiator is exactly the same size as the engine radiator and is mount right in front of the engine radiator. We have space to double the thickness of the charge cooler radiator, in an attempt to get better cooling efficiency. Im sure that this will affect the engine radiator, do we upgrade the engine radiator too to cope with the hotter air passing through..

Any suggestions is very welcome.

Not just hotter air, but it will likely reduce flow as well. If it's an option, I have heard of some manufacturers flow testing across their cores in the direction that the ambient air flows. You may be able to get someone to make you a "matched pair" that will be optemised for ambient air flow across both cores. I've considered it so many times but never had the budget. Also being in Australia, I have easy access to a number of reputable cooling system specialists, not sure what it's like over your way.

The other option is just to try and upgrade the charge cooler first. If your engine cooling isn't an issue yet, it may not be even with the upgraded charge cooler, you likely won't know till it becomes an issue, but it may be worth trying for simplicities sake.

As Ben said, I'd expect a double hit - warmer air and less air mass passing through the radiator.

I don't know your budget, or resources, but there are some specialists who make low restriction cores for both - but $$$ and lead time.

Other things that may help is giving some careful thought to the airflow path into, and OUT OF, the cores - some radiator fan shrouds are 'less than optimum', and some vehicles will use a dust/splash/'belly pan' under the engine bay that may restrict the air exit.

A little 'left field' is if you can fit larger oil cooler(s) - a lot of engine heat is removed via the oil, and dropping it's temperature will help lower the engine temperature a little.

Gord is on the money, two great ideas there I'd completely overlooked. Adding an oil cooler should be rather cheap and easy, and as you said, more effective than most people realise.

As for airflow, there's a guy on youtube called Julian Edgar, a fellow Aussie, he has some great video's (and books) on basic car aero modification which can be carried out rather cheap and easy (subjectively). He has one or two videos on ducting for radiators and intercoolers specifically.