Looks like I will be joining the crew - 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 08-29-2009, 06:41 PM   #1
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default Looks like I will be joining the crew

The "bolts/studs/nuts are backing out and loosening" crew

Last night after a long drive and letting car cool off I go to touch the downpipe and the whole dp/turbo is MOVING. WTF!! I touch the bolts holding turbo to manifold and they're all loose as hell. Tightened them.

Thing is: I don't track the car. I don't really beat on it much, just some WOT pulls here and there, nothing crazy. And they're already starting to back out.

Guess I'll be hanging out in the "studs backing out" thread more often now, as well as carrying a 14mm socket with me at all times.
18psi is offline   Reply With Quote
Old 08-29-2009, 06:46 PM   #2
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,110
Total Cats: 518
Default

Quote:
Originally Posted by 18psi View Post
Guess I'll be hanging out in the "studs backing out" thread more often now, as well as carrying a 14mm socket with me at all times.
way cheaper than v-bands. Welcome.
curly is offline   Reply With Quote
Old 08-30-2009, 12:03 AM   #3
Senior Member
 
Join Date: Nov 2005
Location: Austin, TX yall
Posts: 849
Total Cats: 0
Default

Quote:
Originally Posted by curly View Post
way cheaper than v-bands. Welcome.
QFT

I wouldn't have a Greddy if I was a baller.

Chris
Miatamaniac92 is offline   Reply With Quote
Old 08-30-2009, 12:21 AM   #4
Elite Member
iTrader: (1)
 
NA6C-Guy's Avatar
 
Join Date: Feb 2008
Location: Birmingham Alabama
Posts: 8,038
Total Cats: 43
Default

I have never seen the likes of studs backing out as I do here. I still haven't figured out why the Miata has such a hard time keeping studs/nuts tight.
NA6C-Guy is offline   Reply With Quote
Old 08-30-2009, 01:19 AM   #5
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

I'm tightening mine very 3-4 weeks now. Drive it until I hear rattle, put floor jack under DP, jack up, tighten. It's a five minute job.

Still going to fix it right sometime. I have to pull the mani and weld a crack so I will go to bolts instead of studs with lock nuts on the back of the flange when that happens.
Stein is offline   Reply With Quote
Old 08-30-2009, 02:44 AM   #6
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default

Your mani cracked?
I'll have to check mine for cracks too, though with the amount of welding we did I highly doubt it.
18psi is offline   Reply With Quote
Old 08-30-2009, 02:57 AM   #7
Elite Member
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,322
Total Cats: 12
Default

I've done about 7 sr20det swaps into the Nissan 240sx, and almost everyone has the nuts backing out on the turbo every month or so. It's so frustrating because they're quite hard to get to, and most of these motors all have the OEM locking mechanism on them. Luckily in my case, I haven't had to tighten anything on my turbo setup since I put it on. Woots for DIY and HKS manifold
dustinb is offline   Reply With Quote
Old 08-30-2009, 03:24 AM   #8
Elite Member
iTrader: (1)
 
NA6C-Guy's Avatar
 
Join Date: Feb 2008
Location: Birmingham Alabama
Posts: 8,038
Total Cats: 43
Default

Does tack welding hold up? Like a tack or two on each nut or stud? Seems like I saw someone talking about that a month or two ago. I'd imagine it cracks and gives up the ghost pretty quickly.
NA6C-Guy is offline   Reply With Quote
Old 08-30-2009, 03:41 AM   #9
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default

Quote:
Originally Posted by NA6C-Guy View Post
Does tack welding hold up? Like a tack or two on each nut or stud? Seems like I saw someone talking about that a month or two ago. I'd imagine it cracks and gives up the ghost pretty quickly.
I'm pretty sure a decent sized tack weld would help a ton if not solve the problem altogether, I just think it would SUCK if you had to take the nut off later for any reason.
18psi is offline   Reply With Quote
Old 08-30-2009, 12:14 PM   #10
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

you guys are talking about street driven cars, right?
y8s is offline   Reply With Quote
Old 08-31-2009, 12:06 AM   #11
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Quote:
Originally Posted by y8s View Post
you guys are talking about street driven cars, right?
Yeah, that's why we are having our own chat. We can't sit at the big kids' table yet.
Stein is offline   Reply With Quote
Old 08-31-2009, 12:08 AM   #12
Elite Member
iTrader: (46)
 
Stein's Avatar
 
Join Date: Dec 2007
Location: Nebraska
Posts: 4,812
Total Cats: 138
Default

Quote:
Originally Posted by 18psi View Post
Your mani cracked?

Just where #2 and #3 meet in the middle. No biggie. Joints to the flanges are good. I saw it when I was tightening my nuts again. Never noticed it before because it's under the heat shield.
Stein is offline   Reply With Quote
Old 08-31-2009, 12:29 AM   #13
Elite Member
iTrader: (15)
 
Join Date: Sep 2007
Location: Incline Village, NV
Posts: 2,073
Total Cats: 5
Default

Quote:
Originally Posted by 18psi View Post
I'm pretty sure a decent sized tack weld would help a ton if not solve the problem altogether, I just think it would SUCK if you had to take the nut off later for any reason.
Might wanna give a set of stage 8s a try. I have good success off track with them. On track they almost lasted an entire day too.
thesnowboarder is offline   Reply With Quote
Old 08-31-2009, 03:02 AM   #14
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,202
Total Cats: 2,584
Default

Quote:
Originally Posted by y8s View Post
you guys are talking about street driven cars, right?
Unfortunately, yes.
Quote:
Originally Posted by Stein View Post
Yeah, that's why we are having our own chat. We can't sit at the big kids' table yet.

Quote:
Originally Posted by thesnowboarder View Post
Might wanna give a set of stage 8s a try. I have good success off track with them. On track they almost lasted an entire day too.
Hmm, well its worth a shot. I'll check them again in a few weeks and if they don't loosen too bad I'll just deal with it and tighten them on a regular basis. If they start loosening faster or more often I'll definitely start looking for a more permanent solution.

Unfortunately I'm in no way even considering vbands or any of that ****: way too expensive for me for now.
18psi is offline   Reply With Quote
Old 08-31-2009, 10:48 AM   #15
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

v-bands are the way.
hustler is offline   Reply With Quote
Old 08-31-2009, 11:15 AM   #16
Senior Member
iTrader: (1)
 
Join Date: Sep 2007
Location: Trenton, NJ
Posts: 1,125
Total Cats: 0
Default

Quote:
Originally Posted by hustler View Post
v-bands are the way.
I heard someone was working on yours yesterday.........
ArtieParty is offline   Reply With Quote
Old 08-31-2009, 11:43 AM   #17
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

ok since this is street-chat and I've not been to the track with the current setup but it NEVER loses nuts and bolts, here's my simple description of what I have:

stock hardware at the head (gasket, studs, original nuts), mild steel long tube header with 1/2" head flange.

8mm studs from ATP hand threaded into turbo flange of manifold
no gasket
8mm "audi turbo" style copper nuts from ATP (or audi or porsche) tightened to my best effort (25-30 ft lbs give or take?)

same thing on turbine outlet (8mm, hand tight + 25-30 ft lb audi copper nuts)

**** stays put for tens of thousands of miles.

you guys need more free universal threadlocker: rust
y8s is offline   Reply With Quote
Old 08-31-2009, 12:07 PM   #18
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by ArtieParty View Post
I heard someone was working on yours yesterday.........
Hopefully the experience in which you "heard" this information was short lived. I expect sweat-shop conditions to appease his newest customers.

I'm this crap stays together I'm going to send him a hooker.
hustler is offline   Reply With Quote
Old 08-31-2009, 12:20 PM   #19
Guest
iTrader: (6)
 
Join Date: Sep 2007
Location: Vaughan, On, Canada
Posts: 1,092
Total Cats: 0
Default

I have the same issue on my Street Driven car here in Ontario, Canada. It is an older BEGI manifold and I pretty much have to carry a stubby 13mm wrench in the glove box to tigthen the nuts once a week.
M-Tuned is offline   Reply With Quote
Old 08-31-2009, 03:10 PM   #20
Elite Member
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

I had my studs back out at an autox a couple months back. Haven't come out again since I re-tightened them. They just survived a blast 5000 feet up a mountain (keeping up with an evo) on saturday, too.

I kinda have to agree with y8s on this. Heat cycling/rust seems to keep them in pretty well for most of the non-psychotic drivers.
wayne_curr is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
open invitation to Mazda /Fozda meet Chicago area 10/3 Hot_Wheels Local Meets, Events and Tech Days 2 09-24-2015 03:43 PM
Jeep soft top help aidandj Insert BS here 1 09-15-2015 09:09 AM
FM 1.8 Mani, Test Pipe, HP+, Injectors Chooofoojoo Miata parts for sale/trade 6 09-13-2015 11:01 AM
Noob from Fort Worth, Texas checking in. Miatabro Meet and Greet 7 09-11-2015 01:13 PM
i miss my miater, but am making tons of ching-dow hustler Insert BS here 21 11-14-2006 03:53 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 07:17 PM.