Only want to boost 6 psi - Page 3 - 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 01-24-2007, 03:16 PM   #41
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Dec 2006
Location: San Francisco, CA
Posts: 298
Total Cats: 0
Default

I have a cheap SS autochrome manifold I got new for $150.
Planning on using that until I breaks then I'll upgrade to something else.
Halcyon is offline   Reply With Quote
Old 01-24-2007, 04:07 PM   #42
Senior Member
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Oh. Guess we're in the same boat. So there's no downpipe with the manifold?

I have the cheap MR manifold and the accompanying cheap downpipe. I use a DSM based turbo as well.

I suppose the problem you face is that if you get a downpipe fabbed then your manifold breaks beyond repair, you'll just have to buy another downpipe when you change manifolds. Likely the new manifold will alter the placement of the turbo causing your downpipe to no longer fit.
UofACATS is offline   Reply With Quote
Old 01-24-2007, 04:09 PM   #43
Elite Member
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

have the cash handy for a new one before installing the SSA piece... Mark's lasted 3 weeks.
Arkmage is offline   Reply With Quote
Old 01-24-2007, 04:14 PM   #44
Senior Member
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

Ehh. 3 weeks = suck. Do you remember if he tried to repair it? I'll look for the thread..

It's always more expensive to buy the cheap manifold.
UofACATS is offline   Reply With Quote
Old 01-25-2007, 04:57 AM   #45
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Dec 2006
Location: San Francisco, CA
Posts: 298
Total Cats: 0
Default

Was mark pushing high psi?
Halcyon is offline   Reply With Quote
Old 01-25-2007, 10:03 AM   #46
Elite Member
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,900
Total Cats: 0
Default

yeah... he was/is.
Arkmage is offline   Reply With Quote
Old 01-25-2007, 09:48 PM   #47
Senior Member
 
Join Date: Mar 2006
Posts: 1,379
Total Cats: 1
Default

Quote:
Originally Posted by UofACATS View Post
Ehh. 3 weeks = suck. Do you remember if he tried to repair it? I'll look for the thread..

It's always more expensive to buy the cheap manifold.
I don't think it would have failed with an internal wastegate. I was pushing 17 PSI.

Mark
Markp is offline   Reply With Quote
Old 01-25-2007, 11:18 PM   #48
Elite Member
iTrader: (7)
 
samnavy's Avatar
 
Join Date: Apr 2006
Location: VIRGINIA BEACH, VA
Posts: 6,020
Total Cats: 175
Default

Was it the high psi, or simply a few heat cycles that cracked it.
17psi is a lot of boost, but how much more stress is put on the manifold itself over what 7psi generates. I'd think that there wouldn't be all that much more wear and tear on a manifold regardless of boost.

What cracks manifolds over time is the heat cycles. After a dozen or so hot/cold/hot/cold heat cycles, the metal expands and contracts and then the crappy imperfect welds let go.

Am I right?
Does boost contribute significantly to the wear of the manifold?
samnavy is offline   Reply With Quote
Old 01-26-2007, 07:34 PM   #49
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Lexington, SC
Posts: 2,084
Total Cats: 0
Default

sorry if i'm a bit late in the convo, but Halcyon have you thought about flyinmiata's Voodoo box? They use it on there basic kits with no other fuel/engine management with stock injectors. Its about $405.
mazda/nissan is offline   Reply With Quote
Old 01-26-2007, 07:36 PM   #50
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Lexington, SC
Posts: 2,084
Total Cats: 0
Default

And samnavy i'm not sure if boost contributes much, but i know that boost/heat/and an overhead design can lead to a bunch of cracks from the stress being put on those crappy welds you speak of
mazda/nissan is offline   Reply With Quote
Old 01-27-2007, 10:02 AM   #51
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

just run a fpr and be done with it maybe some WI with a spring to preload the WG or adjustable wG actuator limiting to 6 or so psi is simple
magnamx-5 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 59 12-15-2017 09:00 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
01-05 Fab9 PNP COPs (used) FrankB Miata parts for sale/trade 6 09-30-2015 12:48 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 01:48 PM.