Turbo oil pressure - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

R32 Combat · 27th July 2006, 09:29 PM

What is the recomended oil pressure for a plain bearing turbo(T51r)?

Abbey M/S · 27th July 2006, 10:00 PM

Plain bearing need to run high oil pressure as the shafts are designed to run on an oil film, Roller like less volume as the oil is just to lubricate the balls in the bearing. High volume of oil can cause the balls to skate and be damaged.

R32 Combat · 28th July 2006, 06:13 AM

Thanks Abbey.

The reason I ask is since fitting the JUN oil pump, the pressure is beating the oil seals in the turbo. 8bar is the max pressure. I'm thinking this is too much.

ExScoobyT · 28th July 2006, 07:58 AM

Can you fit restricted oil feeds as per BB cores (maybe the hole would need to be bigger for non-BB cores....)

R32 Combat · 28th July 2006, 09:42 AM

The hole is only 1mm already, the problem is, I don't want to starve the poor thing of oil.

I was hoping someone might have found a solution to this problem already. There are enough people running high pressure pumps.

tweenierob · 28th July 2006, 10:27 AM

Andy,

I have run up to 9bar pressure on my non BB Kai, worn seals?

Rob

R32 Combat · 28th July 2006, 11:06 AM

I don't think the seals are at fault. It was fine on my old engine with the std oil pump.

It's interesting that you say you ran with 9 bar ok. I would have thought my pressure wouldn't have exceeded the max designed pressue. Maybe thay were damaged when the turbo was re-balanced.

27th July 2006, 09:29 PM	#1 (permalink)
R32 Combat New Users Join Date: Jan 2004 Location: Berkshire Posts: 4,357	Turbo oil pressure What is the recomended oil pressure for a plain bearing turbo(T51r)?

28th July 2006, 10:27 AM	#6 (permalink)
tweenierob GTROC Member Join Date: Aug 2003 Location: herts Posts: 1,838	Andy, I have run up to 9bar pressure on my non BB Kai, worn seals? Rob __________________ 599hp R35 Gtr www.trracing.co.uk T62 Going back on for track WTF!! :D Addicted to Snett!! Roll on the 24th of jan £99 rocks!

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27th July 2006, 10:00 PM	#2 (permalink)
Abbey M/S GTR Register Member Join Date: Feb 2002 Location: The workshop... Posts: 1,964	Plain bearing need to run high oil pressure as the shafts are designed to run on an oil film, Roller like less volume as the oil is just to lubricate the balls in the bearing. High volume of oil can cause the balls to skate and be damaged.

28th July 2006, 06:13 AM	#3 (permalink)
R32 Combat New Users Join Date: Jan 2004 Location: Berkshire Posts: 4,357	Thanks Abbey. The reason I ask is since fitting the JUN oil pump, the pressure is beating the oil seals in the turbo. 8bar is the max pressure. I'm thinking this is too much.

28th July 2006, 07:58 AM	#4 (permalink)
ExScoobyT GTR Register Member Join Date: Jan 2004 Location: `down sourfff Posts: 1,052	Can you fit restricted oil feeds as per BB cores (maybe the hole would need to be bigger for non-BB cores....)

28th July 2006, 09:42 AM	#5 (permalink)
R32 Combat New Users Join Date: Jan 2004 Location: Berkshire Posts: 4,357	The hole is only 1mm already, the problem is, I don't want to starve the poor thing of oil. I was hoping someone might have found a solution to this problem already. There are enough people running high pressure pumps.

28th July 2006, 11:06 AM	#7 (permalink)
R32 Combat New Users Join Date: Jan 2004 Location: Berkshire Posts: 4,357	I don't think the seals are at fault. It was fine on my old engine with the std oil pump. It's interesting that you say you ran with 9 bar ok. I would have thought my pressure wouldn't have exceeded the max designed pressue. Maybe thay were damaged when the turbo was re-balanced.