Tial 38 question - 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 09-25-2007, 06:49 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2007
Location: Issaquah, WA
Posts: 166
Total Cats: 0
Default Tial 38 question

Ok so I had a major boost leak before I lit my car on fire. I just got everything off and went straight to the WG. Its a Tial 38. I looked at the online technical section on their website and it looks like there is suppose to be a valve seat in between the flange and the valve to seal it properly.

Well my WG there is about a 1-2mm gap in between the flange and Valve and I dont see a valve seat piece anywhere.


Is this gap suppose to be there? If not Im guessing this is my boost leak.
piratetim is offline   Reply With Quote
Old 09-25-2007, 07:33 PM   #2
Senior Member
iTrader: (4)
 
Join Date: May 2007
Location: Ontario
Posts: 790
Total Cats: 0
Default

It is PHYSICALLY impossible to have a boost leak at the external wastegate, you may have an exhaust leak, not boost.

Look somewhere else.
reddroptop is offline   Reply With Quote
Old 09-25-2007, 07:39 PM   #3
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

there's an aluminum ring that seats at the bottom of the piston near the inlet flange. maybe it's stainless. in any case, it's shown here on the right:

y8s is offline   Reply With Quote
Old 09-25-2007, 09:55 PM   #4
Senior Member
iTrader: (6)
 
Join Date: Mar 2005
Location: Sammamish, Washington
Posts: 1,396
Total Cats: 0
Default

Let me know if you need one. I have em for $25.
Kelly is offline   Reply With Quote
Old 09-25-2007, 10:39 PM   #5
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

I think they call it the fire ring around the forums.
neogenesis2004 is offline   Reply With Quote
Old 09-25-2007, 11:47 PM   #6
Senior Member
iTrader: (6)
 
nester's Avatar
 
Join Date: Sep 2005
Location: Houston, TX
Posts: 812
Total Cats: 0
Default

Quote:
Originally Posted by reddroptop View Post
It is PHYSICALLY impossible to have a boost leak at the external wastegate, you may have an exhaust leak, not boost.

Look somewhere else.

That's really just semantics.. We all knew what he meant, but you had to try and be the smart one of the bunch.


As for the valve seat.. this is what it looks like..



It sits in the recess, like one would assume.


Historically, I've always had trouble with the 38mm wastegates and leaks, gasket blowouts, and other assorted errata. I swore to myself after the last time, that i would shell out for a 44 next time.

My best recommendation is to find a thick copper wastegate gasket. I used to have a source for those, but the guy went out of business or disappeared, who knows. I am sure someone on the internet sells one..
nester is offline   Reply With Quote
Old 09-26-2007, 12:57 AM   #7
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

errr nester, how about just NO gasket? works great for me.
y8s is offline   Reply With Quote
Old 09-26-2007, 01:10 AM   #8
Senior Member
iTrader: (6)
 
nester's Avatar
 
Join Date: Sep 2005
Location: Houston, TX
Posts: 812
Total Cats: 0
Default

Yes, no gasket. It works good sometimes..

I know TiAL will hate to hear this.. but the one knockoff TiAL 38 I had.. was true as could be... I've had a couple real TiAL 38's that didn't meet the straight edge test.... Nothing a little time with the belt sander couldn't fix..

As long as both surfaces are true, rock out with the no gasket fix..

:hammer:
nester is offline   Reply With Quote
Old 09-26-2007, 02:48 AM   #9
Senior Member
iTrader: (6)
 
Join Date: Mar 2005
Location: Sammamish, Washington
Posts: 1,396
Total Cats: 0
Default

Its sad to say but the Tial gaskets do suck. The Turbonetics Deltagate gaskets that have a fire ring have been flawless for me and my buddies. ATP has em.
Kelly is offline   Reply With Quote
Old 09-26-2007, 07:19 AM   #10
Elite Member
iTrader: (8)
 
Join Date: Sep 2006
Location: Severn, MD
Posts: 1,927
Total Cats: 5
Default

I couldn't find the firering gaskets at ATP. Though I hate EIPtuning, they're local and had a good price:

http://www.eiptuning.com/ecomm/prodd...-20142A&cat=33

Frank
fmowry is offline   Reply With Quote
Old 09-26-2007, 08:32 AM   #11
Senior Member
iTrader: (4)
 
Join Date: May 2007
Location: Ontario
Posts: 790
Total Cats: 0
Default

Quote:
Originally Posted by nester View Post
That's really just semantics.. We all knew what he meant, but you had to try and be the smart one of the bunch.
No, I was not trying to to be the "smart one of the bunch."
reddroptop is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
NA Seat Sliders and Seat Belt Receivers skipstr Miata parts for sale/trade 2 09-28-2015 11:53 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 AM


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 10:50 PM.