Differences between Oil & Water Cooled Turbo?
24 September 2005, 02:42 PM
#31
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Originally Posted by ALi-B
Yeah, I may have been a bit iffy on that, my point was that they don't last as long and aren't as safe as the original rubber ones. Not sure how regularly they need to be changed as routine, but I know what happens when they aren't 
Paul
25 September 2005, 01:28 PM
#32
I agree about the flexing issues as part of the problem, not to mention issues caused by bad installation and unseen damage caused by caliper removal or fitment issues causing by unnecessary kinking, bending or pulling.
But I disagree about them being as safe as oe rubber ones, rubber hoses always will be safer because the hoses can be properly inspected to assertain their condition and the rubber doesn't suffer failure caused by fatigue or the memory effect of the teflon inner tubing and the effects of excess bending or kinking (all of which not covered under any brake hose guarentees...wear and tear, and improper usage
)
I think I'll can this little lot for now as its off-topic - and this issue should for being saved up for a new thread
But I disagree about them being as safe as oe rubber ones, rubber hoses always will be safer because the hoses can be properly inspected to assertain their condition and the rubber doesn't suffer failure caused by fatigue or the memory effect of the teflon inner tubing and the effects of excess bending or kinking (all of which not covered under any brake hose guarentees...wear and tear, and improper usage
)I think I'll can this little lot for now as its off-topic - and this issue should for being saved up for a new thread
26 September 2005, 08:34 AM
#34
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So, following from TonyB(ull****)urns (il)logic, all our engines are "water assisted", oil cooled!
About the only turbo's I know of that are not water cooled, are those fitted in Trucks and fork-lifts etc!
About the only turbo's I know of that are not water cooled, are those fitted in Trucks and fork-lifts etc!
26 September 2005, 12:43 PM
#36
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Originally Posted by STEVECHAPS
Jesus, it was originally an innocent enough question!!!
However......I now know a bit more(?).
The turbo's are both Garrett (still not sure what number as none showing on the casings), & they are each fed by two separate oil lines, so one for lubrication & one for cooling. I'm advised to get a turbo timer sharpish as 5-10 minutes cooling time is required!
The original info that they are USA spec & roller bearing is also correct.
Not sure if I'm happy or not, the spool up is lightning fast with no noticeable lag but if that's at the expense of longevity it's a potential high price to pay.
However......I now know a bit more(
?).The turbo's are both Garrett (still not sure what number as none showing on the casings), & they are each fed by two separate oil lines, so one for lubrication & one for cooling. I'm advised to get a turbo timer sharpish as 5-10 minutes cooling time is required!
The original info that they are USA spec & roller bearing is also correct.
Not sure if I'm happy or not, the spool up is lightning fast with no noticeable lag but if that's at the expense of longevity it's a potential high price to pay.
" two separate oil lines, so one for lubrication & one for cooling"
so then the hose connections will be: oil-lubrication entry on top, oil drain on bottom, coolling-jacket inlet one side, cooling outlet opposite side - right?
Thats a 'water-cooled' turbo by design. I suppose there is nothing to stop you using oil as the cooling medium passed through the cooling jacket, but I've never heard of it being done before. A big advantage of using water as the cooling is that if plumbed correctly it will thermo-syphon after switch-off and so turbo-timers are not required. I suspect that oil would be too viscous to thermo-syphon. I'm sceptical that you are actually using oil for cooling, your probably being advised by someone talking bollox, like what was in your original unedited post.
An 'oil-cooled' turbo by design has only the oil inlet on top and the oil drain below. The oil both lubricates and cools.
Last edited by DuncanG; 26 September 2005 at 04:04 PM.
26 September 2005, 03:20 PM
#37
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Originally Posted by DuncanG
Steve,
" two separate oil lines, so one for lubrication & one for cooling"
so then the hose connections will be: oil-lubrication entry on top, oil drain on bottom, coolling-jacket inlet one side, cooling outlet opposite side - right?
Thats a 'water-cooled' turbo by design. I suppose there is nothing to stop you using oil as the cooling medium, but I've never heard of it being done before. A big advantage of using water as the cooling is that if plumbed correctly it will thermo-syphon after switch-off and so turbo-timers are not required. I suspect that oil would be too viscous to thermo-syphon. I'm sceptical that you are actually using oil for cooling, your probably being advised by someone talking bollox, like what was in your original unedited post.
An 'oil-cooled' turbo by design has only the oil inlet on top and the oil drain below. The oil both lubricates and cools.
" two separate oil lines, so one for lubrication & one for cooling"
so then the hose connections will be: oil-lubrication entry on top, oil drain on bottom, coolling-jacket inlet one side, cooling outlet opposite side - right?
Thats a 'water-cooled' turbo by design. I suppose there is nothing to stop you using oil as the cooling medium, but I've never heard of it being done before. A big advantage of using water as the cooling is that if plumbed correctly it will thermo-syphon after switch-off and so turbo-timers are not required. I suspect that oil would be too viscous to thermo-syphon. I'm sceptical that you are actually using oil for cooling, your probably being advised by someone talking bollox, like what was in your original unedited post.
An 'oil-cooled' turbo by design has only the oil inlet on top and the oil drain below. The oil both lubricates and cools.
Paul
27 September 2005, 08:15 PM
#40
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Personally I would not waste money IMHO, on braided lines having found no benefits from fitment on several different makes.
David
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