hi, just wondering on the turbo conversions that people do how do you sort out the cooling of the turbo? do you get an oil cooler and plumb it up and run it straight off the battery or ecu?? cheers
Tom
Tom
Tuning question for the cinq/sei turbo guys/gals
- Thread starter Floppydodo
- Start date
Currently reading:
Tuning question for the cinq/sei turbo guys/gals
The oil from the Turbo drains straight back to the sump,
Most half decent Turbo's will have an oil cooler but this is fed usually by a thermostatic sandwich plate
Most half decent Turbo's will have an oil cooler but this is fed usually by a thermostatic sandwich plate
the punto GT or even the fiat coupe oil cooler would be ideal, I wouldn't recommend running a tubby with out it
actually of you run an inter-cooler they are not ideal as they are the wrong shape search the the cento oil cooler thread that is a far better solution
ahhh! so does the oil cooler just work on its own out of the way somwhere? or have people just connectted to the sump through one end and then it goes back to the turbo?? sorry i dont fully understand it. Cheers for the replys
The oil cooler cools all the oil in the engine and is connected to the pressurised oil system, usually by a sandwich plate with thermostat.
The turbo gets its oil supply from one of the spare ports on the oil pump, and the return goes into the sump.
Cheers
SPD
The turbo gets its oil supply from one of the spare ports on the oil pump, and the return goes into the sump.
Cheers
SPD
Turbos themselves are never actually cooled: some have a water supply which helps control the heat getting to the bearings, all have an oil supply to lubricate the bearings.
It would be nice if we could have water cooled turbos for the cento but i dont think there are any that would work. from what ive read there not cooled (as such) by the water while the car is running (no point even trying to cool exhaust components) when the engine is turned off the water that sits in the core boils off and keeps the oil from cooking when thick people turn the engine of after ragging the car.
The oil itself does all the cooling while the car is running by running thru the bearings and pouring over the shaft (hence another reason for a oil cooler
)
The oil itself does all the cooling while the car is running by running thru the bearings and pouring over the shaft (hence another reason for a oil cooler
)
Some of the Japanese turbos may actually be of a suitable size. I'm dreaming of a turbo off the JDM Scooby Legacy. IIRC, 2.4 litre, twin turbo, ball bearing, lots of titanium rotating components, dual entry, water cooled, very fast spool up. Like hen's teeth, though.
Effectively the water flow is constant -- it'll only affect the bearings (and the oil flowing to them). While the water cooled ones can be run dry, it's probably not a brilliant idea -- you loose the (marginal) advantages of post shutdown cooling (which won't be great as the water pump won't flow any coolant -- in some OEM fittings there are mechanisms to overcome this) for sure, but I'd guess that the bearings are actually toleranced to take the cooling into effect.
Of course, the reason you don't cool the turbo itself is because the heat energy is responsible for some of the thrust: the fashion is to actually insulate them to they stay hot.
Effectively the water flow is constant -- it'll only affect the bearings (and the oil flowing to them). While the water cooled ones can be run dry, it's probably not a brilliant idea -- you loose the (marginal) advantages of post shutdown cooling (which won't be great as the water pump won't flow any coolant -- in some OEM fittings there are mechanisms to overcome this) for sure, but I'd guess that the bearings are actually toleranced to take the cooling into effect.
Of course, the reason you don't cool the turbo itself is because the heat energy is responsible for some of the thrust: the fashion is to actually insulate them to they stay hot.
thankyou, cheers for the comments everyone!
I have looked deeply into ball bearing turbos but as you say there rare to get this small and they cost a bomb.
What I ment with the watercooling is it seems most have a large water feed but a smaller exit to restrict the flow through the turbo core (to not add as much unnecessary load on the engines cooling system)
from what i can tell once the engine is turned off the coolant stops in the turbo and takes the heat away in maybe a heat pump fashion (hotter water rises causing it to pull cooler water thru the turbo)
It should work like that -- I think they call it "thermo-siphonage" or something like that.
I'm actually -- I've only ever seen one of the Legacy ones and missed it -- thinking of a GT25R. They're just outside the range of the 1108 -- I think Garret say 1.4 and up -- but might just sort out the kind of boostspikeitis (and the need to run over 1 bar to get any real power) that the high boost tubs suffer from. Probably be a bit laggy, though, even with a proper mani and exhaust.
I'm actually -- I've only ever seen one of the Legacy ones and missed it -- thinking of a GT25R. They're just outside the range of the 1108 -- I think Garret say 1.4 and up -- but might just sort out the kind of boostspikeitis (and the need to run over 1 bar to get any real power) that the high boost tubs suffer from. Probably be a bit laggy, though, even with a proper mani and exhaust.
agreed, but i think the main stopping point would be cost. you are looking at a grand or so for the turbo and stupid amounts of time on a dyno with exhaust and manifold tweeks.
The advantage, though, is that (being the smallest BB turbo Garret make) they're often upgraded, so there should be a few knocking about.
wonder if the BB core could be fitted garrets turbine and compressor housings? could make a brilliant hybrid
sorry to dig up and old post but has anyone got any pics of there oil cooler setup? cheers, Tom
- Joined
- Feb 16, 2005
- Messages
- 5,983
- Points
- 988
bare in mind this is on a 1368cc with an external stat
One other way (on the 1108 and 1242 8v there's more room) is to use a take off plate (rather than a blanking plate) for the filter and run a Renault 5 GTT or a Clio Williams oil filter (same thread, but shorter).
Lots of permutations. It's possible also to use a remote filter, as on Martin's car.
Lots of permutations. It's possible also to use a remote filter, as on Martin's car.
