3 AN or 4 AN line for turbo feed line?
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I'm back in the graveyard digging things up.
Has anybody used a -4an with a -10an return? Based on what I've read in the archive -10 fits better than -12 over the stock return. The banjo bolt on the feed line I am going to use has a -4an out. Therefore the -4/-10 combo would be the simplest solution, but I don't want any excess oil smoke. Meaning, if -4an is acceptable but -3an is ideal I would rather add an extra adaptor and go with -3an.
Has anybody used a -4an with a -10an return? Based on what I've read in the archive -10 fits better than -12 over the stock return. The banjo bolt on the feed line I am going to use has a -4an out. Therefore the -4/-10 combo would be the simplest solution, but I don't want any excess oil smoke. Meaning, if -4an is acceptable but -3an is ideal I would rather add an extra adaptor and go with -3an.
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Originally posted by CCarlisi
I'm back in the graveyard digging things up.
Has anybody used a -4an with a -10an return? Based on what I've read in the archive -10 fits better than -12 over the stock return. The banjo bolt on the feed line I am going to use has a -4an out. Therefore the -4/-10 combo would be the simplest solution, but I don't want any excess oil smoke. Meaning, if -4an is acceptable but -3an is ideal I would rather add an extra adaptor and go with -3an.
I'm back in the graveyard digging things up.
Has anybody used a -4an with a -10an return? Based on what I've read in the archive -10 fits better than -12 over the stock return. The banjo bolt on the feed line I am going to use has a -4an out. Therefore the -4/-10 combo would be the simplest solution, but I don't want any excess oil smoke. Meaning, if -4an is acceptable but -3an is ideal I would rather add an extra adaptor and go with -3an.
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Thanks for the replies guys, but what feed size is the 10 being used with, -3AN or -4AN. I have two concerns:
(1) that -4AN may be too big of a feed, even with a simple gravity drop on the return
(2) increasing the feed from a -3AN to a -4AN while at the same time decreasing the return from a -12 to a -10 mayl create backpressure causing some oil to be pushed out through the turbo seals.
(1) that -4AN may be too big of a feed, even with a simple gravity drop on the return
(2) increasing the feed from a -3AN to a -4AN while at the same time decreasing the return from a -12 to a -10 mayl create backpressure causing some oil to be pushed out through the turbo seals.
#10
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iTrader: (1)
I'm using 3an inlet and 10an return.
My S5 Turbo was rebuilt and the turbo guys removed the internal oil restrictor.
If you still have the internal restrictor(special thing hitachi's have) then 4an would be fine.
If it's removed you run the chance of too much oil in the turbo.
My S5 Turbo was rebuilt and the turbo guys removed the internal oil restrictor.
If you still have the internal restrictor(special thing hitachi's have) then 4an would be fine.
If it's removed you run the chance of too much oil in the turbo.
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Normally, with people that run the -4 feed, they run the larger (-12) return to aid in the flow of oil, but I'm pretty sure a -10 will be enough.
As said above though, some people have experienced excess oil with the larger feeds..
Justin
As said above though, some people have experienced excess oil with the larger feeds..
Justin
Last edited by jdhuegel1; 06-02-04 at 02:08 PM.
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Originally posted by Crusader_9x
when i bought my turgbo i was told 3 an feed 10 return or 4 an feed and 12 return. but they recomended a 3 feed with the rotaries high oil presure
when i bought my turgbo i was told 3 an feed 10 return or 4 an feed and 12 return. but they recomended a 3 feed with the rotaries high oil presure
I spoke to Demetrios today. He runs a -4AN feed with a -10 return and no restrictors.
My friend called Turbonetics and they suggested either a 3/10 or 4/12.
It sounds like a 3 or 4 feed will work with either a 10 OR 12 return.
#17
Rotary Enthusiast
i bought it from cheapturbo.com i got a 2nd gen. what i was saying is if you wanna go with a 4 feed then use a 12 return or if your gonna use a 3 feen then u can use a 10 return. 3/10 is a -3 an and 4/12 is -4 an, i am pretty sure.
#20
Just in time to die
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Here is what is in the Garrett book.
Recommended min ID for oil feed is 9.53 mm= -6
Recommended min ID for drain is 19mm = -12
Oil pressure at turbo inlet to be 2.11kg/sq cm minimum at peak torque speed and above, and no lower than .70kg/sq cm at low idle.
oil outlet should be angled no worse than 35* when installed.
That's per Garrett, My opinion is -4 feed and -12 return minimum.
Run no restrictor due to the fact the bearing housing is it own restrictor. The "seal" on the turbine end of the shaft is a piston ring, there is no positive oil seal, therefore the drain tube must be free of "goosenecks" or elbows due drain flow is not under pressure. The drain tube must return the oil and vent back up the same tube, that is why the size needs to be so much larger than the inlet. The compressor end seal may also be a piston ring seal or a carbon seal. If it is a carbon seal, then its more of a positive seal than the piston ring, but we still have the piston ring on the turbine end.
Hope that was helpful
-Sean
Recommended min ID for oil feed is 9.53 mm= -6
Recommended min ID for drain is 19mm = -12
Oil pressure at turbo inlet to be 2.11kg/sq cm minimum at peak torque speed and above, and no lower than .70kg/sq cm at low idle.
oil outlet should be angled no worse than 35* when installed.
That's per Garrett, My opinion is -4 feed and -12 return minimum.
Run no restrictor due to the fact the bearing housing is it own restrictor. The "seal" on the turbine end of the shaft is a piston ring, there is no positive oil seal, therefore the drain tube must be free of "goosenecks" or elbows due drain flow is not under pressure. The drain tube must return the oil and vent back up the same tube, that is why the size needs to be so much larger than the inlet. The compressor end seal may also be a piston ring seal or a carbon seal. If it is a carbon seal, then its more of a positive seal than the piston ring, but we still have the piston ring on the turbine end.
Hope that was helpful
-Sean
Last edited by Zero R; 06-02-04 at 09:43 PM.
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Sean,
I see you got my email.
Very interesting.
Great response as usual.
Thanks again.
I see you got my email.
The drain tube must return the oil and vent back up the same tube
Great response as usual.
Thanks again.
Last edited by CCarlisi; 06-02-04 at 10:52 PM.