YB GT30 oil restrictor size
Thread Starter
Gary Krishna
iTrader: (9)
Joined: Mar 2008
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From: Rickmansworth, Hertfordshire.
YB GT30 oil restrictor size
Morning all,
I've heard that I have to run an oil restrictor on my GT3076 but not sure what size I have to get or even where to get one from.
Any advice please people?
I've heard that I have to run an oil restrictor on my GT3076 but not sure what size I have to get or even where to get one from.
Any advice please people?
15000
Joined: Dec 2014
Posts: 46
Likes: 4
From: Greece
I copied the following from garretts website i hope it helps:
Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires. The benefit is seen in improved boost response due to less windage of oil in the bearing. In addition, lower oil flow further reduces the risk of oil leakage compared to journal-bearing turbochargers. Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo. The use of an oil restrictor can (but not always) help ensure that you have the proper oil flow/pressure entering the turbocharger, as well as extract the maximum performance.
Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires. The benefit is seen in improved boost response due to less windage of oil in the bearing. In addition, lower oil flow further reduces the risk of oil leakage compared to journal-bearing turbochargers. Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo. The use of an oil restrictor can (but not always) help ensure that you have the proper oil flow/pressure entering the turbocharger, as well as extract the maximum performance.
Thread Starter
Gary Krishna
iTrader: (9)
Joined: Mar 2008
Posts: 4,029
Likes: 67
From: Rickmansworth, Hertfordshire.
I haven't found them to be particularly helpful in the past mate, I had loads of grief with my turbo when I bought it from them and it only got sorted out because Tony sorted it out with them. 
Thread Starter
Gary Krishna
iTrader: (9)
Joined: Mar 2008
Posts: 4,029
Likes: 67
From: Rickmansworth, Hertfordshire.
I copied the following from garretts website i hope it helps:
Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires. The benefit is seen in improved boost response due to less windage of oil in the bearing. In addition, lower oil flow further reduces the risk of oil leakage compared to journal-bearing turbochargers. Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo. The use of an oil restrictor can (but not always) help ensure that you have the proper oil flow/pressure entering the turbocharger, as well as extract the maximum performance.
Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires. The benefit is seen in improved boost response due to less windage of oil in the bearing. In addition, lower oil flow further reduces the risk of oil leakage compared to journal-bearing turbochargers. Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo. The use of an oil restrictor can (but not always) help ensure that you have the proper oil flow/pressure entering the turbocharger, as well as extract the maximum performance.
as said oil pressure needs checking at entry to the turbo oil inlet.
I have a gauge for this ade used mine to check his feeds on the v6 cosworth.
ive never known yb pumps make much more than 70 psi anyway, but rb26s on modded pumps I have seen 130 psi which is a major concern for a bb core.
my 710 hp rb26 needed a restrictor fitting as it was leaking by the seal and smokeing, many people seem to just guess which is madness imo, its dependant on oil pump flow and the size of the feed line hose plays a part aswell as the bigger it is the more volume it will flow and a smaller restrictor will be needed.
I have a gauge for this ade used mine to check his feeds on the v6 cosworth.
ive never known yb pumps make much more than 70 psi anyway, but rb26s on modded pumps I have seen 130 psi which is a major concern for a bb core.
my 710 hp rb26 needed a restrictor fitting as it was leaking by the seal and smokeing, many people seem to just guess which is madness imo, its dependant on oil pump flow and the size of the feed line hose plays a part aswell as the bigger it is the more volume it will flow and a smaller restrictor will be needed.
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