Oil feed restrictor size - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to Miataturbo.net   Members

DIY Turbo Discussion greddy on a 1.8? homebrew kit?

LinkBack Thread Tools
Old 05-18-2010, 11:54 AM   #1
Thread Starter
iTrader: (76)
18psi's Avatar
Join Date: Apr 2008
Posts: 32,872
Total Cats: 1,941
Default Oil feed restrictor size

Ok, so after lurking around in quite a few threads I still can't figure out what the deal is with restrictor sizes. Some claim they don't run a restrictor, some say its absolutely necessary, etc etc. Can't find a general consensus.

I got a Godspeed gt30 chinacharger.
It is oil and water cooled. advertised as "wet float bearing" whatever that means.
Here is the link:

I just recently purchased an oil feed line with 2 restrictors claimed to be made specifically for this turbo:

One is for .8mm (for ball bearing turbo's)
One is 1.5mm (for journal bearing turbo's)

Since I don't trust any info I see on ebay what do you guys recommend I run? The smaller or the larger, or a completely different size restrictor altogether?

18psi is offline   Reply With Quote
Old 05-18-2010, 11:56 AM   #2
Boost Czar

iTrader: (60)
Braineack's Avatar
Join Date: May 2005
Location: Chantilly, VA
Posts: 69,654
Total Cats: 1,356

run without one, and if you need one, start with a .125" pop rivet trick and then the 1.5mm (.060") restrictor fitting.
Braineack is offline   Reply With Quote
Old 05-18-2010, 12:05 PM   #3
Elite Member
iTrader: (10)
Join Date: Oct 2008
Location: Seattle, Wa
Posts: 1,780
Total Cats: 28

Wet float bearing = journal bearing.

I ran without a restrictor using a -4an feed line and I got a fair bit of smoking at idle and big puffs at WOT. I've also heard of people not running one and being fine (corky for instance recommended NOT running one).

I agree with the Brain. Try running without one and see how it goes. If you end up needing one, my advice to you is to run down to your local hardware store and pick up a 1/8" pop rivet and drop that bish in there. Works great.
Jeff_Ciesielski is offline   Reply With Quote
Old 05-18-2010, 12:09 PM   #4
Thread Starter
iTrader: (76)
18psi's Avatar
Join Date: Apr 2008
Posts: 32,872
Total Cats: 1,941

Just the info I needed. Thanx
18psi is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 52 08-28-2016 04:18 AM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 03:00 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 09:39 AM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 03:20 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 02:44 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 On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 10:29 AM.