Flaminsam Posted August 30, 2016 Share Posted August 30, 2016 Not necessarily true, a 3an line would provide restriction anywayJust speaking from my previous experience with the vf and TD. The an3 line will provide a slight restriction I agree 👍🏻 Quote Link to post Share on other sites
5e colin Posted August 31, 2016 Share Posted August 31, 2016 internal an3 hose is 3.2mm might aswell leave the garden hose on it as it wont be stopping anything Quote Link to post Share on other sites
Ollieh17 Posted August 31, 2016 Share Posted August 31, 2016 Do subaru even use one from standard? did loads of research on this when fitting a brand nee turbo. Its each to there own i suppose. Why not try it without a restrictor,if its smoking then fit one.An3 again is garrett JOURNAL BEARING advice.... Quote Link to post Share on other sites
Ollieh17 Posted August 31, 2016 Share Posted August 31, 2016 Rather have too much pressure and a bit of oil past the seals than risking low oil pressure. Quote Link to post Share on other sites
Starlet__SR Posted August 31, 2016 Share Posted August 31, 2016 (edited) By fitting a restrictor you're impeding flow not pressure. All you'll be doing is creating pressure before the turbo. If you want to lower pressure than you need to run a larger diameter feed line. Edited August 31, 2016 by Starlet__SR Quote Link to post Share on other sites
Ollieh17 Posted August 31, 2016 Share Posted August 31, 2016 would you want to restrict flow to bottom end bearings? Quote Link to post Share on other sites
5e colin Posted August 31, 2016 Share Posted August 31, 2016 what the fuck are you on about 2 totally diferent things can not compare also has nothing to do with with the bottom end having a unrestricted oil feed will have a lower overall oil pressure !!!! its a win win win situation having oil feed restrictor Quote Link to post Share on other sites
Ollieh17 Posted August 31, 2016 Share Posted August 31, 2016 Well its not as journal bearings run very similar to crank and rod bearings. Guess garrett in all there wisdom must be completely wrongThe journal bearing system in a turbo functions very similarly to the rod or crank bearings in an engine. These bearings require enough oil pressure to keep the components separated by a hydrodynamic film. If the oil pressure is too low, the metal components will come in contact causing premature wear and ultimately failure. If the oil pressure is too high, leakage may occur from the turbocharger seals. With that as background, an oil restrictor is generally not needed for a journal-bearing turbocharger except for those applications with oil-pressure-induced seal leakage. Remember to address all other potential causes of leakage first (e.g., inadequate/improper oil drain out of the turbocharger, excessive crankcase pressure, turbocharger past its useful service life, etc.) and use a restrictor as a last resortReason td04 may need one is because they are battered and probably nearing the end of their life. Restrictor may just prolong the issue. Ive killed two td04s and think it was down to the restrictor. Line was fine no blockages and both had munched bearings. Primed before hand etc.I can't be fucked to argue anymore, the information is there from experts. Go with whatever...not my car lol Quote Link to post Share on other sites
5e colin Posted August 31, 2016 Share Posted August 31, 2016 By fitting a restrictor you're impeding flow not pressure. All you'll be doing is creating pressure before the turbo. If you want to lower pressure than you need to run a larger diameter feed line. yes you are altering pressure the turbo oil feed is before the oem oil pressure relieve valve !!!! Quote Link to post Share on other sites
SpikeyJp_68 Posted August 31, 2016 Author Share Posted August 31, 2016 Slap a restrictor in, be grand Quote Link to post Share on other sites
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