HHR SS Topics and information on the 2008-2010 Chevy HHR SS Turbocharged models.

GMTU Boost fluctuations

Old Feb 15, 2014 | 12:02 PM
  #11  
SS fan's Avatar
Premium Member
 
Joined: 10-09-2010
Posts: 14,420
From: Tacoma
They are available remanufactured from some part stores now....much less money to switch them than it was.
Old Feb 15, 2014 | 12:03 PM
  #12  
firemangeorge's Avatar
Platinum Member
 
Joined: 12-06-2009
Posts: 11,721
From: Alabama
Gotta agree with Sam on that. Good performance plus they look good.

Attachment 15807

Last edited by firemangeorge; May 30, 2014 at 11:07 PM.
Old Feb 15, 2014 | 05:19 PM
  #13  
frdfandc's Avatar
Senior Member
 
Joined: 03-08-2012
Posts: 104
From: Elkton, MD
Originally Posted by eaglefreak138
Hmm. Is that all points of mph when you go Wot? You should see over 20 at times especially below 40mph or between 50-70mph

It may quickly flare higher, but I don't see it on the boost gauge.

I've checked over everything - Map sensor contact with the A/C compressor, all wires are soldered - may have to revisit that once it gets warmer and re-do them, checked for boost leakdown.

Going to switch out the yellow spring for the green spring next. If that doesn't work then I'm planning getting it tuned via HPTuners.
Old Feb 15, 2014 | 05:33 PM
  #14  
SS fan's Avatar
Premium Member
 
Joined: 10-09-2010
Posts: 14,420
From: Tacoma
Our group is planning on that this spring also. Sure there will be a learning curve but with 6 SS's in the group, shouldn't take too long to dial them in...

Maybe 7 hey Paul you wanta tune that thing yet ?
Old Feb 15, 2014 | 08:59 PM
  #15  
paulBvtn's Avatar
Senior Member
 
Joined: 10-20-2011
Posts: 134
From: Portland, OR
You forget Sam, I *am* tuned with Trifecta. And pretty happy with it too!
Old Feb 15, 2014 | 09:07 PM
  #16  
SS fan's Avatar
Premium Member
 
Joined: 10-09-2010
Posts: 14,420
From: Tacoma
Sorry man getting old CRS.
Old Feb 16, 2014 | 10:33 AM
  #17  
SS fan's Avatar
Premium Member
 
Joined: 10-09-2010
Posts: 14,420
From: Tacoma
Let's just say if you gave Vince, or GM your money there is..

Of course I have both........

Still haven't bought the suite.
Old Feb 17, 2014 | 08:46 AM
  #18  
fiveothis's Avatar
Member
 
Joined: 02-09-2014
Posts: 63
From: indiana
Originally Posted by eaglefreak138
That's what I'm thinking. I haven't noticed it in "i" mode. Man, this tune has awoke since the faulty charge pipe was replaced. If this GMTU is fun I can't wait to try Trifecta when my warranty is up.
What do you mean by "I" mode??
Old Feb 17, 2014 | 08:51 AM
  #19  
eaglefreak138's Avatar
Thread Starter
Senior Member
 
Joined: 12-04-2009
Posts: 463
From: Port St Lucie, Florida
Popped the yellow spring in to see if that helps the mid range throttle occasional bouncing. Test drive gave me 25lbs with no flutter from a 60mph roll, 23lbs no flutter from a 40mph roll and reduced fluctuating while accelerating from a light with mid throttle. No flutter at any poiny and no CEL yet (knock on wood). Mine may be liking the yellow.
Old Feb 21, 2014 | 08:31 PM
  #20  
bigjacksauto's Avatar
Senior Member
 
Joined: 10-19-2011
Posts: 1,553
From: N.Y.
Originally Posted by SS fan
Our group is planning on that this spring also. Sure there will be a learning curve but with 6 SS's in the group, shouldn't take too long to dial them in...

Maybe 7 hey Paul you wanta tune that thing yet ?
??
I am in the process of learning the hptunes.
Should be running a hptune early spring myself hopefully.

Thread Tools
Search this Thread

All times are GMT -5. The time now is 05:37 PM.