Forced Induction Superchargers | Turbochargers | Intercoolers

inconsistent boost

Thread Tools
 
Search this Thread
 
Old Sep 20, 2009 | 06:11 AM
  #1  
sowaidi's Avatar
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
iTrader: (5)
 
Joined: Sep 2007
Posts: 353
Likes: 2
From: Qatar
Default inconsistent boost

the problem is the boost controller is set at 12 psi (aem tru boost controller). im suing an sts turbo on a 6.0 with a t56. the boost fluctuates and doesnt stay on 12 but reaches it in some runs and other runs gets 7-8 only in 3+ gear. 1st and 2nd gets to 5-6 psi. i dont know if the problem is from the controller or the wastegate.
Reply
Old Sep 20, 2009 | 07:34 AM
  #2  
c5andtyphoon's Avatar
Staging Lane
 
Joined: Apr 2006
Posts: 57
Likes: 0
From: illinois
Default

i have a aem tru booost controller on my 92 typhoon. i have it set at 16 psi. it will go to 16 drop to 12. go back to 13 back to 8..... mine fluctuates very bad too. and the worst part is i can drastically feel when it falls off of boost..
Reply
Old Sep 20, 2009 | 08:52 AM
  #3  
sowaidi's Avatar
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
iTrader: (5)
 
Joined: Sep 2007
Posts: 353
Likes: 2
From: Qatar
Default

so would you think the problem is the controller itself? the arent any leaks in the turbo piping.
Reply
Old Sep 20, 2009 | 08:57 AM
  #4  
elias_799's Avatar
TECH Addict
iTrader: (8)
 
Joined: Oct 2008
Posts: 2,047
Likes: 2
From: toronto ontario canada
Default

what do you guys have set for scr ?

i have an aem tru boost and it is set for 10 psi, it gets up there and stays exactly there
Reply
Old Sep 20, 2009 | 05:16 PM
  #5  
sowaidi's Avatar
Thread Starter
TECH Apprentice
15 Year Member
Photogenic
iTrader: (5)
 
Joined: Sep 2007
Posts: 353
Likes: 2
From: Qatar
Default

i played around with the settings a lot, i think i had it set at 2.00 or something like that. i thought the controller only raises and lowers boost.
Reply
Old Sep 20, 2009 | 05:46 PM
  #6  
black98ws6ta's Avatar
TECH Addict
iTrader: (77)
 
Joined: May 2002
Posts: 2,107
Likes: 2
From: louisville,ky
Default

Originally Posted by sowaidi
the problem is the boost controller is set at 12 psi (aem tru boost controller). im suing an sts turbo on a 6.0 with a t56. the boost fluctuates and doesnt stay on 12 but reaches it in some runs and other runs gets 7-8 only in 3+ gear. 1st and 2nd gets to 5-6 psi. i dont know if the problem is from the controller or the wastegate.
This problem sounds like a typical sts car. You might want to check the system for leaks and make sure the exhaust is not worse then factory and wrapped to retain the heat and help spool the turbo.
Reply




All times are GMT -5. The time now is 01:56 AM.

story-0
10 Reasons Daily Driving a Swap Project SUCKS! (& 1 Reason to Do It Anyway)

Slideshow: 10 reasons daily-driving a swap project might not be for you. Or is it?

By Michael S. Palmer | 2026-06-17 09:39:05


VIEW MORE
story-1
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-2
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-06-18 10:26:23


VIEW MORE
story-3
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-4
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-5
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-6
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-7
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-8
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-9
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE