Notices
Evo Engine / Turbo / Drivetrain Everything from engine management to the best clutch and flywheel.

Another boost creep issue

 
Old Mar 10, 2019, 09:31 AM
  #1  
Evolving Member
Thread Starter
iTrader: (2)
 
blackline's Avatar
 
Join Date: Sep 2017
Location: NYC
Posts: 376
Liked 17 Times in 17 Posts
Another boost creep issue

Originally the car had a Megan o2 housing and I was getting boost creep because the WG opening was too small. I swapped out the stock wg and switched to a STM o2 open dump emlinator and I’m still getting boost creep.

Im not sure what else can cause the creep, I set the wg preload with 2 full turns and still can’t get it to not creep.

Target boost is 25psi but it creep close to 30psi by 6k in 3rd.

I’m not sure what else to do, any ideas?


BBK full turbo
grimspeed 3 port
turbosmart 22psi wg
SD
4 bar map

Last edited by blackline; Mar 10, 2019 at 04:36 PM.
blackline is offline  
Old Mar 10, 2019, 04:21 PM
  #2  
Newbie
iTrader: (1)
 
machoymaru's Avatar
 
Join Date: May 2014
Location: tampa fl
Posts: 33
Likes: 0
Liked 6 Times in 6 Posts
Man that sucks from my experience I had my clutch slip and that will make my boost go crazy all the way up to 30 psi. Dont know if this is much help, but I really do hope you fix it and enjoy the Evo.
machoymaru is offline  
Old Mar 10, 2019, 04:39 PM
  #3  
Evolving Member
Thread Starter
iTrader: (2)
 
blackline's Avatar
 
Join Date: Sep 2017
Location: NYC
Posts: 376
Liked 17 Times in 17 Posts
Originally Posted by machoymaru View Post
Man that sucks from my experience I had my clutch slip and that will make my boost go crazy all the way up to 30 psi. Dont know if this is much help, but I really do hope you fix it and enjoy the Evo.
I don't think I'm having clutch issues but thank you for that input as any little bit helps.


I connected the wastegate to the jpipe today but i netted the same results. Going to apply air to the WG and see if the arm is moving and now much. Once that's done I'm going to disconnected the wg buckle and check the range of the wg flap. I'll report back soon
blackline is offline  
Old Mar 10, 2019, 09:59 PM
  #4  
Evolved Member
iTrader: (1)
 
2006EvoIXer's Avatar
 
Join Date: Jul 2012
Location: California
Posts: 2,803
Liked 130 Times in 123 Posts
Can't you tune the boost creep down?
2006EvoIXer is online now  
Old Mar 11, 2019, 06:05 AM
  #5  
Evolving Member
Thread Starter
iTrader: (2)
 
blackline's Avatar
 
Join Date: Sep 2017
Location: NYC
Posts: 376
Liked 17 Times in 17 Posts
Originally Posted by 2006EvoIXer View Post
Can't you tune the boost creep down?

Iím not sure but running on wastegate pressure netted the same results. Iím going to pressure test the wastegate now
blackline is offline  
Old Mar 11, 2019, 09:58 AM
  #6  
EvoM Super Moderator
iTrader: (41)
 
heel2toe's Avatar
 
Join Date: Jul 2007
Location: Massachusetts
Posts: 4,285
Liked 68 Times in 66 Posts
We discussed this in your other thread but you didn't take my advice. Your target boost is 25# yet you're using a 22# WG spring. You want your WG spring to be around half what your target boost level would be. Put back on the oem gate and try again.
heel2toe is offline  
Old Mar 11, 2019, 10:38 AM
  #7  
Evolving Member
 
Wicked_X's Avatar
 
Join Date: Feb 2018
Location: Sacramento, California
Posts: 139
Likes: 0
Liked 5 Times in 5 Posts
Originally Posted by blackline View Post


I set the wg preload with 2 full turns and still canít get it to not creep.
I had to run my turbosmart 18psi actuator to zero preload to help with creep from my MAP o2 housing. With even a little preload it would spike to like 24-25 psi at just wastegate pressure. I would try no preload.
Wicked_X is offline  
Old Mar 11, 2019, 11:02 AM
  #8  
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 11,996
Liked 661 Times in 625 Posts
You need to put a stock or lower boost WGA on it.

There's really not reason to not just run a stock actuator with only trying to run 25psi of boost.
letsgetthisdone is offline  
Old Mar 11, 2019, 12:24 PM
  #9  
Evolving Member
Thread Starter
iTrader: (2)
 
blackline's Avatar
 
Join Date: Sep 2017
Location: NYC
Posts: 376
Liked 17 Times in 17 Posts
Originally Posted by heel2toe View Post
We discussed this in your other thread but you didn't take my advice. Your target boost is 25# yet you're using a 22# WG spring. You want your WG spring to be around half what your target boost level would be. Put back on the oem gate and try again.
You're right but I was just following instruction from my tuner.

Originally Posted by Wicked_X View Post
I had to run my turbosmart 18psi actuator to zero preload to help with creep from my MAP o2 housing. With even a little preload it would spike to like 24-25 psi at just wastegate pressure. I would try no preload.
I'll try this also.

Originally Posted by letsgetthisdone View Post
You need to put a stock or lower boost WGA on it.

There's really not reason to not just run a stock actuator with only trying to run 25psi of boost.
going to slap the stock gate in and see what's going on.
blackline is offline  
Old Mar 11, 2019, 12:58 PM
  #10  
EvoM Super Moderator
iTrader: (41)
 
heel2toe's Avatar
 
Join Date: Jul 2007
Location: Massachusetts
Posts: 4,285
Liked 68 Times in 66 Posts
All good man. Baffled that's what your tuner recommended as it is a pretty elementary concept.

Just throw back on the stock gate and call it a day. I bet that will fix your issue, tuner will need to throw more WGDC into it but no biggie.

And I would not recommend running zero preload. That will promote lazy boost characteristics as there is a good chance the flapper wont even seal with zero preload. I forget how many turns but if you're looking at the arm you want the turnbuckle roughly halfway up, looking like a half moon if that makes sense.
heel2toe is offline  
Old Mar 14, 2019, 02:38 PM
  #11  
Evolving Member
Thread Starter
iTrader: (2)
 
blackline's Avatar
 
Join Date: Sep 2017
Location: NYC
Posts: 376
Liked 17 Times in 17 Posts
Looks like the Turbosmart wastegate is bad. It took 30psi to crack it and 40psi to open the gate 1/4 way, 20psi didn't do anything. Waiting on TS to warranty it. Also, my evo9 wg vacuum port is broken so I can't test with that.
blackline is offline  
Old Mar 14, 2019, 03:07 PM
  #12  
EvoM Super Moderator
iTrader: (41)
 
heel2toe's Avatar
 
Join Date: Jul 2007
Location: Massachusetts
Posts: 4,285
Liked 68 Times in 66 Posts
Strange.are you sure the arm isnt bent and binding somehow? I still think you have way too much spring for the target boost you plan to run. However if the TS WG is like the one for my EFR you can mix and match springs so you should be able to make it work with the right combination of springs. That is assuming its not physically damaged.

Alternatively, I have an IX WG kicking around. PM me is interested...
heel2toe is offline  
Old Mar 14, 2019, 06:45 PM
  #13  
Evolved Member
iTrader: (27)
 
boostedwrx's Avatar
 
Join Date: Dec 2002
Location: Seattle, WA
Posts: 5,026
Liked 1 Time in 1 Post
On ethanol? 30psi at 6k sounds good
boostedwrx is offline  
Old Mar 14, 2019, 06:54 PM
  #14  
Evolving Member
 
Fox_IX's Avatar
 
Join Date: Dec 2015
Location: HWY 9
Posts: 234
Liked 11 Times in 10 Posts
Originally Posted by boostedwrx View Post
On ethanol? 30psi at 6k sounds good
This was my first thought as well, what seems to be the issue?
Fox_IX is offline  
Old Mar 14, 2019, 07:47 PM
  #15  
Evolving Member
Thread Starter
iTrader: (2)
 
blackline's Avatar
 
Join Date: Sep 2017
Location: NYC
Posts: 376
Liked 17 Times in 17 Posts
Originally Posted by heel2toe View Post
Strange.are you sure the arm isnt bent and binding somehow? I still think you have way too much spring for the target boost you plan to run. However if the TS WG is like the one for my EFR you can mix and match springs so you should be able to make it work with the right combination of springs. That is assuming its not physically damaged.

Alternatively, I have an IX WG kicking around. PM me is interested...
You can hear it leaking when applying pressure. Once I get it warrantied and still doesn't work correctly I'll PM you

Originally Posted by boostedwrx View Post
On ethanol? 30psi at 6k sounds good
I'm trying to you reach you numbers with the BBK

Originally Posted by Fox_IX View Post
This was my first thought as well, what seems to be the issue?
Not yet, tuning the 93oct map first then the e85...but it will live on ethanol after the tune is done.
blackline is offline  

Thread Tools
Search this Thread

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.