Upgrading cooling on a turbo

[m1tch]

Does anyone know where I can get an upgrade kit to add to an oil cooled turbo to upgrade it to both oil and water cooled, like the stock turbo?

[SiH]

Depends on the tubby dude, the core needs to have the coolant pathways in place, you can\'t just add it.
Although i\'d me surprised if a tubby didn\'t have water cooling already - what is it?

[m1tch]

Hmm well I know that the OEM turbo has both oil and water feeds, but most aftermarket turbos seem to only have oil feeds, would perhaps running it thought a secondary oil cooler help? The FC3S oil cooler can handle up to 500bhp though lol im just thinking about when I shut the car down, my alarm does have a turbo timer on it though.

[meddy]

Just drive off boost before stopping and then let it idle for a short while. Will be fine

[Prof]

The water cooling of the turbo is part of the Centre Housing Rotating Assembly (CHRA) which is basically the core of the turbo.  The only way to add water cooling to a turbo is to replace that section, which effectively means geting the turbo rebuilt as it would then need rebalancing.  It would only be possibly if both the turbine and compressor sections would match a new CHRA that had water cooling.
 
If the turbo is only oil cooled, it should be fine and not require additional cooling - although your exsiting oil lines may not be adequate for the new turbo\'s requirements, given that the existing oil lines are really only supplying a trickle of oil for lubrication on a stock FC turbo.

[m1tch]

Im going to be fitting braided lines onto the turbo, apparently some come with adaptors as the oil pressure (looking at the pressue gauge is about 60psi) Are you suggesting I don\'t need to add for example a small oil cooler inline with the oil line to the turbo?

[pdtaylor18]

I would say that and can not see the need for any additional coolers giving that the standard one is flipping good as it is.
Dave when you say a trickle how is this regulated? or whats the restriction? also apart from making sure you have a decent enough bore size for the feed is there anywhere else it can be fed from to get a better oil feed or is the standard connection good enough?

[Prof]

I believe the standard oil feed line has the restrictor built in - plus it\'s a narrow pipe.  It\'s supplied from a banjo on the top of the engine - I would imagine you can get a better supply from it than is required for the stock turbo.
 
The stock oil drain line is quite large, but with anything other than the stock turbo or a hybrid it wont fit.  You\'ll need to use some 1/2 inch or 10an line to return oil to the sump.

[m1tch]

I was just thinking of putting a small oil cooler inbetween the turbo and the return pipe, I know that the OEM oil cooler on an FC can handle 500bhp, but thats to cool all the engine oil, im just thinking about increasing the cooling in a localised area, I know of some cars that run a separate tank and oil cooler just for the turbo as this will sort out any problems with oil changes and oil pressures.

[meddy]

But as soon as you switch of the engine oil flow through the cooler stops and if you switched off in too hot a condition you may still encounter carbon build up on the rotor shaft/journals which Im guessing is what your worried about and hence why your trying to improve cooling. As I said before just make sure the car is allowed to run off boost for a while and then if your still worried let things idle for a while after youve stopped. It doesnt need to be a long time as that can cause problems in other ways with blowby.