GT28R (GT2560R) @ 99/00 Miata - do I need a restrictor? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 11-24-2009, 12:00 PM   #1
Senior Member
Thread Starter
 
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Posts: 1,497
Total Cats: 81
Question GT28R (GT2560R) @ 99/00 Miata - do I need a restrictor?

Hi,

as the title above states - my old TB2529 (came with my original turbo-kit) out of a SAAB 9000 has to go - going with the GT2560R now.

Do I need an oil restrictor for this turbo at my 99/00 Miata?

Thanks
Zaphod is offline   Reply With Quote
Old 11-24-2009, 12:57 PM   #2
Elite Member
iTrader: (17)
 
Join Date: Apr 2009
Location: Atlanta, GA
Posts: 2,831
Total Cats: 0
Default

im not runnin one on my 2560 and all is good but mine is a 96, still a 1.8 though!
WonTon is offline   Reply With Quote
Old 11-24-2009, 02:00 PM   #3
Former Vendor
 
Join Date: Jun 2006
Location: Bell Tuning & Performance
Posts: 1,338
Total Cats: -78
Default

Not necessarily, no. I have not used one on my '02 with a GT2860RS.
Stephanie
Stephanie Turner is offline   Reply With Quote
Old 11-24-2009, 02:02 PM   #4
Elite Member
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,322
Total Cats: 12
Default

What size of line are you using for your oil feed?
dustinb is offline   Reply With Quote
Old 11-24-2009, 02:48 PM   #5
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

TurboByGarrett.com - FAQ's
Quote:
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.
Yes, you make more than 45psi of oil pressure. My last CHRA smoked like crazy on start-up. Now that I have a .060 restrictor, and the new CHRA, I've dropped from 3500 to 3200rpm for target 11.5psi.

Everyone can keep suggesting that you don't need one, but its a $20-40 part that may save you $450 on a CHRA in a few weeks or years.
hustler is offline   Reply With Quote
Old 11-24-2009, 03:08 PM   #6
Senior Member
iTrader: (34)
 
ARTech's Avatar
 
Join Date: Mar 2009
Location: Dallas
Posts: 530
Total Cats: 9
Default

Quote:
Originally Posted by hustler View Post
its a $20-40 part
I need to start charging more

PM me if you need one
ARTech is offline   Reply With Quote
Old 11-24-2009, 03:11 PM   #7
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

I think I'm going to continue to run with the .060 until someone tells me otherwise, or the turbo starts talking back.

Oh and don't worry, I still have some fab work I need your help with, but my schedule is a wreck.
hustler is offline   Reply With Quote
Old 11-24-2009, 03:15 PM   #8
Elite Member
iTrader: (33)
 
RotorNutFD3S's Avatar
 
Join Date: Jan 2007
Location: Newnan, GA
Posts: 2,539
Total Cats: 29
Default

I have not used one on my GT2560R or my GT2871R and have had no ill effects. Funny thing about that FAQ is that Garrett has been building restrictors in their ball-bearing turbos for quite some time so you need to see if it has one or not and go from there.
RotorNutFD3S is offline   Reply With Quote
Old 11-24-2009, 06:43 PM   #9
Senior Member
iTrader: (10)
 
Join Date: Oct 2005
Posts: 718
Total Cats: 5
Default

Im running one on mine 2871r. @ 21psi
TURNS101 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
New M62 Miata owner Pist0n Meet and Greet 4 10-01-2015 09:18 PM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:07 PM.