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 10:38 AM.

story-0
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-1
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-2
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
story-3
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-4
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-5
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-6
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-7
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE