oil feed restrictor question... - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s14unimog · 11-24-2008, 08:51 AM

I'm minutes away from dropping the motor back in and came across one of my last "loose ends". Since I'm switching up my turbo setup (Disco Potato -> 20G) and reusing my SS lines, I've got to change the restrictor to accommodate the new journal bearing turbo; as apposed to the BB disco potato. I called Forced Performance this morning and after presenting the same question, I was told to completely eliminate the restrictor all together... After some more thought, I got to thinking... I had to use a restrictor for the T25 on my old KA-T, but then again I was taking my oil supply from the oil pressure sensor on the other side of the block. That was a long time ago and now we're talking about an SR20.

Are any of you guys using an unrestricted oil feed line on your journal bearing turbos? Come to think of it, does the stock T25 even have a restrictor?

louisdaboois · 11-24-2008, 09:14 AM

stock t25 lines dont have a restrictor to my knowledge, but ive been running a -4 unrestricted on a t25 for over a year and no problems. I wouldnt go with anything above that though, if anything a -3 would be gravy without a restrictor.

s14unimog · 11-24-2008, 09:20 AM

my oil feed line is a -4. but so was the one on my old KA-T setup. does the factory oil outlet port on the SR see less pressure than the oil filter block?

I'm curious now about why I ended up using one on my KA-T

Sileighty_85 · 11-24-2008, 09:21 AM

Stock T-25 uses a restrictor, the restrictor is built into the bajo bolt on the oil feed line on the block.

well if the manufacturer says its not needed I guess it would be fine then

e1_griego · 11-24-2008, 09:37 AM

I ran a .063" restrictor on my t3/t4 with -4an lines (ka-t, though). ATP sells them, and JGS does too. JGS says if the turbo is getting more than 50psi of oil pressure it needs to be restricted.

s14unimog · 11-24-2008, 09:37 AM

^^ funny thing you say that. I got in touch with a fellow SR20 20g owner this morning and he said he has oil in his IC and piping and plans to use one now that the motor is out.

back to square one.

The one thing FP did say, was that they do NOT sell feed lines with restrictors and that the inline filter they do sell for the journal bearing turbo is .100"

slider2828 · 11-24-2008, 09:38 AM

I dunno ATPTurbo always suggest a restrictor for GT series turbo's same with Taka and their lines...

louisdaboois · 11-24-2008, 09:40 AM

Quote:

Originally Posted by Sileighty_85

Stock T-25 uses a restrictor, the restrictor is built into the bajo bolt on the oil feed line on the block.

well if the manufacturer says its not needed I guess it would be fine then

ahhh i learn something new everyday. thats good to know.

Quote:

Originally Posted by s14unimog

^^ funny thing you say that. I got in touch with a fellow SR20 20g owner this morning and he said he has oil in his IC and piping and plans to use one now that the motor is out.

back to square one.

lol, i guess you got your answer then. no harm in using a restrictor, imo.

s14unimog · 11-24-2008, 09:43 AM

Quote:

Originally Posted by slider2828

I dunno ATPTurbo always suggest a restrictor for GT series turbo's same with Taka and their lines...

yeah I've noticed TAKA sells them with their journal bearing line kits.

projectRDM · 11-24-2008, 11:34 AM

ATP turbo swears by using a restrictor period, whereas Phoenix Turbo in AZ stands behind not using one, no matter what the type of turbo. There's a lot of conflicting data but I always stick with using one and I've never seen a turbo go on anything I do for lack of oil/overheating.

jakerps13 · 11-24-2008, 12:30 PM

I'd have to say the same.

SoSideways · 11-24-2008, 12:35 PM

I have an oil restrictor and it's working just fine on my turbo.

s14unimog · 11-24-2008, 02:39 PM

I agree with you Russ. I do know when I did my KA-T way back when, the T25 was passing a lot of oil until I installed a restrictor.

I'm drilling my BB restrictor (.030") out to .063" and running that.

***S14DB*** · 11-24-2008, 02:43 PM

doesn't the 20g use a different thread then the garret?

s14unimog · 11-24-2008, 03:38 PM

^ HA! you know what, that's a good point.

11-24-2008, 08:51 AM	#1
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 38 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	oil feed restrictor question... I'm minutes away from dropping the motor back in and came across one of my last "loose ends". Since I'm switching up my turbo setup (Disco Potato -> 20G) and reusing my SS lines, I've got to change the restrictor to accommodate the new journal bearing turbo; as apposed to the BB disco potato. I called Forced Performance this morning and after presenting the same question, I was told to completely eliminate the restrictor all together... After some more thought, I got to thinking... I had to use a restrictor for the T25 on my old KA-T, but then again I was taking my oil supply from the oil pressure sensor on the other side of the block. That was a long time ago and now we're talking about an SR20. Are any of you guys using an unrestricted oil feed line on your journal bearing turbos? Come to think of it, does the stock T25 even have a restrictor? __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

11-24-2008, 09:14 AM	#2
louisdaboois Zilvia Addict Join Date: Dec 2006 Location: LA, CA Age: 36 Posts: 851 Trader Rating: (28) Feedback Score: 28 reviews	stock t25 lines dont have a restrictor to my knowledge, but ive been running a -4 unrestricted on a t25 for over a year and no problems. I wouldnt go with anything above that though, if anything a -3 would be gravy without a restrictor. __________________

11-24-2008, 09:20 AM	#3
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 38 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	my oil feed line is a -4. but so was the one on my old KA-T setup. does the factory oil outlet port on the SR see less pressure than the oil filter block? I'm curious now about why I ended up using one on my KA-T __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

11-24-2008, 09:21 AM	#4
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	Stock T-25 uses a restrictor, the restrictor is built into the bajo bolt on the oil feed line on the block. well if the manufacturer says its not needed I guess it would be fine then __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

11-24-2008, 09:37 AM	#6
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 38 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	^^ funny thing you say that. I got in touch with a fellow SR20 20g owner this morning and he said he has oil in his IC and piping and plans to use one now that the motor is out. back to square one. The one thing FP did say, was that they do NOT sell feed lines with restrictors and that the inline filter they do sell for the journal bearing turbo is .100" __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

11-24-2008, 09:37 AM	#5
e1_griego Post Whore! Join Date: Sep 2004 Location: Independence, Ore. Age: 40 Posts: 2,722 Trader Rating: (24) Feedback Score: 24 reviews	I ran a .063" restrictor on my t3/t4 with -4an lines (ka-t, though). ATP sells them, and JGS does too. JGS says if the turbo is getting more than 50psi of oil pressure it needs to be restricted.

11-24-2008, 09:38 AM	#7
slider2828 Post Whore! Join Date: Oct 2004 Location: San Francisco, CA Posts: 6,040 Trader Rating: (13) Feedback Score: 13 reviews	I dunno ATPTurbo always suggest a restrictor for GT series turbo's same with Taka and their lines... __________________ Turn and Burn!

11-24-2008, 11:34 AM	#10
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	ATP turbo swears by using a restrictor period, whereas Phoenix Turbo in AZ stands behind not using one, no matter what the type of turbo. There's a lot of conflicting data but I always stick with using one and I've never seen a turbo go on anything I do for lack of oil/overheating. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

11-24-2008, 12:30 PM	#11
jakerps13 Zilvia Member Join Date: Nov 2003 Location: Appleton, WI Age: 40 Posts: 171 Trader Rating: (0) Feedback Score: 0 reviews	I'd have to say the same. __________________ Lower than a pornstar's morals.

11-24-2008, 12:35 PM	#12
SoSideways Post Whore! Join Date: Apr 2003 Location: 你老母 Posts: 4,371 Trader Rating: (4) Feedback Score: 4 reviews	I have an oil restrictor and it's working just fine on my turbo. __________________ SoSideway's iTrader Rating!! *SoSideways' Review Thread!!* http://sosideways.wordpress.com/

11-24-2008, 02:39 PM	#13
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 38 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	I agree with you Russ. I do know when I did my KA-T way back when, the T25 was passing a lot of oil until I installed a restrictor. I'm drilling my BB restrictor (.030") out to .063" and running that. __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

11-24-2008, 02:43 PM	#14
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	doesn't the 20g use a different thread then the garret? __________________ Comments should be taken as Opinions not as Statements of Fact

11-24-2008, 03:38 PM	#15
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 38 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	^ HA! you know what, that's a good point. __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson