Greddy Manifold - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 11-05-2009, 12:57 PM   #1
Newb
Thread Starter
 
Join Date: Oct 2009
Location: Scotland
Posts: 15
Total Cats: 0
Default Greddy Manifold

Hey guys i have hade the same fate as most of you and my greddy manifold has cracked. Has anybody hade them repaired in the past and if so what method was used to repair?

Does anyone know what material is the manifold made from? Cast iron,cast steel,cast aluminium?
allan is offline   Reply With Quote
Old 11-05-2009, 01:07 PM   #2
Elite Member
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Yes they are repairable. Its made of cast iron. Make sure you repair it right. Drill a hole on the end of each of the cracks. Then bevel the cracked part, preheat, and weld. For post welding ping the weld with a blunted object to relieve stress. Viola!
SKMetalworks is offline   Reply With Quote
Old 11-05-2009, 03:17 PM   #3
Senior Member
iTrader: (34)
 
ARTech's Avatar
 
Join Date: Mar 2009
Location: Dallas
Posts: 530
Total Cats: 9
Default

There are two good greddy manis in the classifieds fs. If you end up replacing it, I'd be interested in buying the cracked one.
ARTech is offline   Reply With Quote
Old 11-05-2009, 03:33 PM   #4
Elite Member
iTrader: (28)
 
Join Date: May 2008
Location: St. Augustine FL
Posts: 2,310
Total Cats: 2
Default

you guys are far too nice.... go introduce yourself so u don't get banned....
p51hellfire is offline   Reply With Quote
Old 11-05-2009, 03:44 PM   #5
Newb
Thread Starter
 
Join Date: Oct 2009
Location: Scotland
Posts: 15
Total Cats: 0
Default

Thanks for the info guys, I was thinking of drilling both ends and then cutting a v-grove. Pre heat and then braze with silver solder, then cool down slowly. Would people recomend this method or should i tig weld?
allan is offline   Reply With Quote
Old 11-05-2009, 04:03 PM   #6
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,669
Total Cats: 1,560
Default

TIG weld.
sixshooter is offline   Reply With Quote
Old 03-23-2010, 08:46 PM   #7
mca
Junior Member
iTrader: (5)
 
Join Date: Mar 2010
Location: Huntington Beach, CA
Posts: 153
Total Cats: 1
Default

Please post pics of your repair. Also, how long was it on the car?
mca is offline   Reply With Quote
Old 03-24-2010, 03:12 PM   #8
Junior Member
iTrader: (2)
 
Join Date: Mar 2010
Location: Canada
Posts: 411
Total Cats: 0
Default

If I can offer any advice it would be to just buy a different manifold from another manufacturer. GReddy really can't pull their heads out of their asses on this one. Their manifolds are crap and they warp to all hell. I'm on my 4th one and this one is cracked as well.
E-NA6CE is offline   Reply With Quote
Old 03-24-2010, 03:20 PM   #9
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Welding cast is tricky. Most people dont do it right and it just cracks again.
You have to heat the manifold in an oven to over 500 degrees, then get all the welding done before the manifold props to below 200 degrees. It drops faster than you think.
Full_Tilt_Boogie is offline   Reply With Quote
Old 03-24-2010, 04:45 PM   #10
mca
Junior Member
iTrader: (5)
 
Join Date: Mar 2010
Location: Huntington Beach, CA
Posts: 153
Total Cats: 1
Default

Quote:
Originally Posted by E-NA6CE View Post
If I can offer any advice it would be to just buy a different manifold from another manufacturer. GReddy really can't pull their heads out of their asses on this one. Their manifolds are crap and they warp to all hell. I'm on my 4th one and this one is cracked as well.
Have you tried all the usual fixes like relief cuts at the stud holes or bracing the downpipe to relive manifold stress? Did all of your manfolds fail in similar fashion? i.e. cracks in the same place?
mca is offline   Reply With Quote
Old 03-24-2010, 04:51 PM   #11
Junior Member
iTrader: (2)
 
Join Date: Mar 2010
Location: Canada
Posts: 411
Total Cats: 0
Default

Quote:
Originally Posted by mca View Post
Have you tried all the usual fixes like relief cuts at the stud holes or bracing the downpipe to relive manifold stress? Did all of your manfolds fail in similar fashion? i.e. cracks in the same place?
My first one cracked and this one cracked. I have had relief cuts in the last three and they all warped like hell. My turbo and my downpipe were also hard-braced to my engine so driveline flex wouldn't cause any problems, but that didn't really fix anything. Three out of four warped (even with relief cuts) and two out of four cracked. I talked to the guy that did all my fab work and he said the easiest fix is to design a new manifold, which is great news because the GReddy one is hella restrictive. I used to love GReddy/Trust products, but since owning this car and not receiving a hint of customer support for anything regarding the B6, damn... I really have nothing nice to say about them.
E-NA6CE is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 Yesterday 10:04 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 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 02:31 AM.