T2 to T3 conversion. - 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 09-25-2009, 12:55 PM   #1
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default T2 to T3 conversion.

So, right now, I've got a begi cast mani, gt2860, and begi downpipe. I've got a t3 flanged, externally gated turbo that I'm going to upgrade to. I can make the downpipe, that's a non-issue. The manifold, however, needs something done. The bell manifolds use the same casting for t2 or t3 manifolds. They just drill/cut it for the specific flange. I have access to a mill, and I know someone that can weld cast iron.
So, the question is, should I modify my existing manifold for a t3 flange and an external wastegate? Or should i just sell it and buy a new one?
wes65 is offline   Reply With Quote
Old 09-25-2009, 01:10 PM   #2
Junior Member
iTrader: (6)
 
Join Date: Jan 2006
Location: St Johns, Fl
Posts: 378
Total Cats: 0
Default

Brain is looking to swap from T3 to T2. Maybe you could trade manifold/downpipes with him?
clay is offline   Reply With Quote
Old 09-25-2009, 01:12 PM   #3
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Quote:
Originally Posted by clay View Post
Brain is looking to swap from T3 to T2. Maybe you could trade manifold/downpipes with him?
He has a 1.6L
wes65 is offline   Reply With Quote
Old 09-25-2009, 01:15 PM   #4
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

youre going to put an external wastegate flange on youre BEGi manifold?
Full_Tilt_Boogie is offline   Reply With Quote
Old 09-25-2009, 01:16 PM   #5
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
youre going to put an external wastegate flange on youre BEGi manifold?
Yes, I was thinking about it.
wes65 is offline   Reply With Quote
Old 09-25-2009, 01:49 PM   #6
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

I wnat to do the same thing to mine, but Im scared, lol
Full_Tilt_Boogie is offline   Reply With Quote
Old 09-25-2009, 01:52 PM   #7
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,868
Total Cats: 1,790
Default

Quote:
Originally Posted by wes65 View Post
He has a 1.6L
aw failboat.


fwiw, begi can machine your T2 manifold out to a T3.
Braineack is online now   Reply With Quote
Old 09-25-2009, 02:28 PM   #8
NB/VVT Connoisseur
iTrader: (23)
 
viperormiata's Avatar
 
Join Date: Aug 2008
Location: Key West
Posts: 6,071
Total Cats: 253
Default

Search some old threads by "PatsMX5", he did everything your talking about and came out pretty clean.
viperormiata is offline   Reply With Quote
Old 09-25-2009, 02:53 PM   #9
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Quote:
Originally Posted by Braineack View Post
aw failboat.


fwiw, begi can machine your T2 manifold out to a T3.
Yeah, I talked to corky about that. That's not really the part I'm concerned about. That should be fairly easy. Its the EWG part I'm more concerned about. I've not heard great things about welding to cast iron.
wes65 is offline   Reply With Quote
Old 09-25-2009, 05:24 PM   #10
Elite Member
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

I spoke to Corky about this too. He's never seen a failure yet. I'll be doing the same.
kenzo42 is offline   Reply With Quote
Old 09-25-2009, 07:36 PM   #11
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,363
Total Cats: 1,325
Default

Quote:
Originally Posted by kenzo42 View Post
I spoke to Corky about this too. He's never seen a failure yet. I'll be doing the same.
A failure of what, the EWG weld or the T2->T3 conversion?
Savington is offline   Reply With Quote
Old 09-25-2009, 11:03 PM   #12
Elite Member
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

EWG flange weld.
kenzo42 is offline   Reply With Quote
Old 09-26-2009, 12:53 AM   #13
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

So is your GT2860 for sale then?
thirdgen is offline   Reply With Quote
Old 09-26-2009, 03:53 AM   #14
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,363
Total Cats: 1,325
Default

Quote:
Originally Posted by kenzo42 View Post
EWG flange weld.
I've personally seen photos of a cracked EWG weld on a BEGi S5 manifold.
Savington is offline   Reply With Quote
Old 09-26-2009, 04:00 AM   #15
Elite Member
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

Quote:
Originally Posted by Savington View Post
I've personally seen photos of a cracked EWG weld on a BEGi S5 manifold.
Do you think having the wastegate hang off the DP flange would prove more reliable than welding to cast? Or held on w/ bolts like the FM3:




kenzo42 is offline   Reply With Quote
Old 09-26-2009, 04:32 AM   #16
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,363
Total Cats: 1,325
Default

The FM3 setup would be ideal, with a flange cast into the manifold. Hanging an EWG off the DP is just foolish - all of the downsides of an EWG (cost, weight) with none of the benefit.
Savington is offline   Reply With Quote
Old 09-26-2009, 04:42 AM   #17
Elite Member
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,990
Total Cats: 9
Default

FM3 EWG flange is not cast into the manifold. It's bolted on. From others experiences, I've heard the bolts would loosen similar to the turbo-manifold bolts issue.
kenzo42 is offline   Reply With Quote
Old 09-26-2009, 05:17 AM   #18
NB/VVT Connoisseur
iTrader: (23)
 
viperormiata's Avatar
 
Join Date: Aug 2008
Location: Key West
Posts: 6,071
Total Cats: 253
Default

Quote:
Originally Posted by kenzo42 View Post
FM3 EWG flange is not cast into the manifold. It's bolted on. From others experiences, I've heard the bolts would loosen similar to the turbo-manifold bolts issue.
No problem here. Just regular tightening checks like any normal maintenance.
viperormiata is offline   Reply With Quote
Old 09-26-2009, 04:42 PM   #19
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Quote:
Originally Posted by Savington View Post
I've personally seen photos of a cracked EWG weld on a BEGi S5 manifold.
Isn't the s5 tubular?
wes65 is offline   Reply With Quote
Old 09-26-2009, 04:57 PM   #20
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

No, the S4 and S6 are.

Its about as confusing at video card model denominations.
neogenesis2004 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Barton's na6 Barton Build Threads 48 11-30-2017 04:22 PM
Axis Power Racing CF Hood + Latches codingparadox Miata parts for sale/trade 7 11-20-2015 02:11 AM
1.6 Long nose crank conversion. Crank, pully, oil pump shlammed Miata parts for sale/trade 10 05-30-2014 06:05 PM
Noob that is beginning aspiration conversion. danduv Meet and Greet 48 05-23-2013 12:56 PM
Ultimate NA -> NB interior conversion thread AredMiata General Miata Chat 16 02-01-2013 03:37 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 02:54 PM.