Help! I have a turkey in my turbo! - 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 05-16-2010, 05:22 PM   #1
Junior Member
Thread Starter
iTrader: (4)
 
Join Date: Dec 2007
Location: Springfield, Mass
Posts: 364
Total Cats: 0
Default Help! I have a turkey in my turbo!

I just did my intercooler install and now have major issues with I believe it's compressor surge when I lift off the throttle.

I have a smaller intercooler 18"x 12" x3" with 2.5" inlet and outlet
I did an over the rad from turbo to intercooler using 2" piping and to 2.5"
I routed around the a/c and rad using 2.5" piping to throttle body.
I have IAC hooked up and my BOV is 3" from throttle body.
I have the signal line for the BOV from the nipple right after the throttle body

After hooking everything up, It idled great, no leaks from spraying the couplers, and idle AFR's were good.
I took it for a drive in the parking lot and every time I would be in boost and then let off I hear this awful sound coming from the turbo side. Kinda like the turkey gobble.

From what I've read I thought I hooked everything up correctly. Does anyone have any suggestions of what to check.
BOV worked correctly before when I was running non-intercooled but now I not so sure. Oh BOV is a knock off RS I also have a friends knock off type S but it has two vac nipples and I'm not sure how to hook that up.
thanks for the help
seraph is offline   Reply With Quote
Old 05-16-2010, 05:26 PM   #2
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

The vacuum line goes to the top nipple, the bottom nipple is left opened.

Can you hear the BOV blowing off? Its should be very audible.
It sounds like its just not opening either due to not getting a signal, or because its broken.
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-16-2010, 05:29 PM   #3
Junior Member
Thread Starter
iTrader: (4)
 
Join Date: Dec 2007
Location: Springfield, Mass
Posts: 364
Total Cats: 0
Default

I can't hear the BOV cause the sound from the turbo is so loud! When I idle the car and rev it by hand I think I felt a little air come out but not much. I also am running on a MAF too.

I did try the Type S BOV but it made the car Idle crazy, up and down all over the place and would almost die when I let off the gas by hand. I could feel air leaking from that one at Idle. Do you think I need to run this BOV and recirc?

Last edited by seraph; 05-16-2010 at 05:31 PM. Reason: Ninja Edit
seraph is offline   Reply With Quote
Old 05-16-2010, 05:33 PM   #4
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

The BOV is supposed to be opened during idle, if its not opened at idle then its not doing its job, not very well anyway.
Thats the whole reason you have to recirculate.
Full_Tilt_Boogie is offline   Reply With Quote
Old 05-16-2010, 05:35 PM   #5
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,848
Total Cats: 1,788
Default

It's easy to pinpoint exactly where the noise is coming from if you rev it up hard at idle with your head under the hood.

If I plug my bov with my hand and do this, I can hear the compressor surge.
Braineack is online now   Reply With Quote
Old 05-16-2010, 05:39 PM   #6
Junior Member
Thread Starter
iTrader: (4)
 
Join Date: Dec 2007
Location: Springfield, Mass
Posts: 364
Total Cats: 0
Default

Ok, Well I will pull the RS and put on the S and figure out how to recirc back the turbo inlet. Thanks

I also noticed that it seemed like it was a little harder for me to get into boost, is that normal when running an intercooler?
I seemed hit a lean spot also near O* then it felt like it would kick in. How do I correct that? I have the Begi I guess middle version of their RRFPR. Not the newest one. Do I need to adjust the onset screw tighter?
seraph is offline   Reply With Quote
Old 05-16-2010, 05:42 PM   #7
Junior Member
Thread Starter
iTrader: (4)
 
Join Date: Dec 2007
Location: Springfield, Mass
Posts: 364
Total Cats: 0
Default

Quote:
Originally Posted by Braineack View Post
It's easy to pinpoint exactly where the noise is coming from if you rev it up hard at idle with your head under the hood.

If I plug my bov with my hand and do this, I can hear the compressor surge.
I think I may have heard it like that but it was very faint. Just a little squeak.

When I rev though I never get over 0* on my boost gauge though.
seraph is offline   Reply With Quote
Old 05-16-2010, 06:33 PM   #8
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,848
Total Cats: 1,788
Default

gotta rev all the way to redline. should build 2-5psi.

adding the IC shouldn't make it any harder to get into boost, or feel different.
Braineack is online now   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 57 07-19-2017 05:11 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 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 09:21 AM.