Oil in exhaust, turbo shaftplay question - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 02-16-2007, 06:52 PM   #21
Elite Member
Thread Starter
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,526
Total Cats: 0
Default

i didnt ask about that, but i believe if the bearing fails, you need a new bearing cartridge. Also theres thrust bearings which fail from time to time and that would be an easy fix.
akaryrye is offline   Reply With Quote
Old 02-16-2007, 07:47 PM   #22
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

The restrictor advice is fine I suppose. I just know that everyone but Corky has recommended to me that for all BB turbos that smoke or don't have a built in restrictor you should use a .030 restrictor because ball bearing turbos don't need as much oil thus can handle the lower pressure.
http://www.atpturbo.com/Merchant2/me...egory_Code=OIL
ATP sells that restrictor solely for use in BB turbos.

Many journal bearing turbos smoke without a restrictor and many do not. Journal bearings rotate on a layer of oil thus the higher pressure created with a minimum restrictor size of .06 being used.

What Corky says about the restrictor size being no smaller than .110 could be fine. I see that only being necessary so that particles can pass through that oil line without plugging the restrictor itself. The smaller oil line might help enough as well. I run a -4 and see a max of 60 psi at high rpm of oil pressure at the turbo without a restrictor and using a .075 restrictor i saw 53 psi max. That gives you the idea of the pressure drop using a restrictor smaller than what Corky suggests.
So you have all kinds of options, i would suggest going and buying a pack of 1/8" aluminum pop rivets and inserting the rivet into your -4 AN fitting. It will smash smoothly inbetween the two fittings and not cause any damage to them. The hole measures out to ~.075 and will let you know if you need a restrictor or if you just have a blown seal or something. Worth the $2 if you have the time.
https://www.miataturbo.net/forums/sh...5&postcount=14
My tests on oil pressure the turbo with a -4 feed line.
cjernigan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
91 1.6l turbo complete part out. Tony the Tiger Miata parts for sale/trade 63 12-29-2016 03:23 AM
Complete BEGI S3 NB Kit, Full Enthuza 3" Exhaust, ACT HD Clutch, MS2 PNP, Wideband kronikker Miata parts for sale/trade 17 10-06-2015 11:18 PM
The "other" spool question stefanst DIY Turbo Discussion 44 09-28-2015 08:16 PM
New here, saying hi, here's what I'm workin with. SuperSneakySecretSquirrel Meet and Greet 5 09-06-2015 09:30 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 11:22 AM.