help please - 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 01-25-2008, 02:58 PM   #1
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2007
Location: Cincinnati Ohio
Posts: 146
Total Cats: 0
Default help please

ok i got my t bolt clamps on my IC piping and all that everything there is fine.. i got the 1.8L injectors on they work great..more fueling there. there is one problem.. i'm still not seeing much boost at all like3 psi.. the thing is i've adjusted my wastgate to see if that was it and i've got it tightened down so there is maybe1/4 inch left on the thread ... maybe a little more.. why am i not seeing 5 psi.. and with my mbc i might be able to get like 6 but that doesn't seem right...????
miata-turbo08 is offline   Reply With Quote
Old 01-25-2008, 03:03 PM   #2
I'm Miserable!
 
Join Date: May 2007
Posts: 589
Total Cats: 0
Default

What kind of boost gauge do you have?
MX5-4me is offline   Reply With Quote
Old 01-25-2008, 04:36 PM   #3
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2007
Location: Cincinnati Ohio
Posts: 146
Total Cats: 0
Default

auto meter i already called them about it not reading right and they told me to put it up to a compressor tank and set it to 20 psi and sure enough it should up as 20 psi.. so idk if its the BG but.. my main question is why did i have to tighten the waste gate so much just to get it close to 5psi?? i just don't understand that if i tightend it any more idki if that would be safe cuz its really close to the end of the thread
miata-turbo08 is offline   Reply With Quote
Old 01-25-2008, 04:42 PM   #4
I'm Miserable!
 
Join Date: May 2007
Posts: 589
Total Cats: 0
Default

Quote:
Originally Posted by miata-turbo08 View Post
auto meter i already called them about it not reading right and they told me to put it up to a compressor tank and set it to 20 psi and sure enough it should up as 20 psi.. so idk if its the BG but.. my main question is why did i have to tighten the waste gate so much just to get it close to 5psi?? i just don't understand that if i tightend it any more idki if that would be safe cuz its really close to the end of the thread
Are you sure there are no restrictions in the line feeding the gauge? Is it pinched or kinked in any way?

Any chance that your Wastegate is being held open somehow?
MX5-4me is offline   Reply With Quote
Old 01-25-2008, 04:57 PM   #5
I'm Miserable!
iTrader: (1)
 
Join Date: Oct 2005
Location: Columbia, SC
Posts: 858
Total Cats: 0
Default

leaky bov, leaky coupler, leak between head/manifold or manifold/turbo, wastegate cracked open at rest. There's a bunch of possibilities.

if you're reading ~20vac at idle and the gauge is responsive most likely the gauge is right.
SloS13 is offline   Reply With Quote
Old 01-25-2008, 05:46 PM   #6
Elite Member
iTrader: (7)
 
samnavy's Avatar
 
Join Date: Apr 2006
Location: VIRGINIA BEACH, VA
Posts: 6,020
Total Cats: 175
Default

The amount of threads on your arm doesn't tell anything. The FLAPPER DOOR itself must be held closed under spring tension of the wastegate spring. You need to tighten your arm until it starts to pull the rod out of the wastegate can... then stop. If there's even the smallest gap around the flapper door, it'll severely limit the boost you can make.

When you manually pull on the wastegate arm, how hard is it to pull out. It should be fairly tough. If the arm comes out easy, you might have a blown actuator.
samnavy is offline   Reply With Quote
Old 01-25-2008, 05:57 PM   #7
Junior Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2007
Location: Cincinnati Ohio
Posts: 146
Total Cats: 0
Default

its pretty tough but i'll go out and check in a minute and tighten it a little more i guess and check my bolts that hold my turbo and all that good stuff. and my boost gauge only reads boost not vac. so i wouldnt be able to check that.. i want to get a boost vac. gauge though. my dad orderd it and didn't really know what to get i did but he didn't so.. thats that
miata-turbo08 is offline   Reply With Quote
 
 
Reply


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 12:15 PM.