Forced Induction Superchargers | Turbochargers | Intercoolers

Boost jumping around normal or turbo fubared?

Thread Tools
 
Search this Thread
 
Old Jun 3, 2010 | 10:12 AM
  #1  
MY99TAWS6's Avatar
Thread Starter
TECH Veteran
iTrader: (3)
 
Joined: Apr 2002
Posts: 4,719
Likes: 3
From: Kelowna,BC
Default Boost jumping around normal or turbo fubared?

Ok noticing some surging lately ,could be tuning but think its turbo problem.
Its harder to check boost at full wot do to the speeds the car gets too and haven't got copilot to watch boost gage for me.

But when I put it into boost at say half throttle and hold throttle steady I am seeing like 4,2,3,4,2 type of think happening. I would think this is obviously showing the turbos are not working right. At least one of them .
This is on my stock aps turbos not my LG turbos. Lg turbos have not been installed but will be shortly. Just wanted to try to run the aps a bit longer.Course with two its hard to know if one or both is problem. I have not checked shaft play on them lately. checked a few months back and the drivers side was fine and never checked the passenger side but then wasn't noticing the surging. And not seeing any clouds of smoke yet either.
Reply
Old Jun 3, 2010 | 10:36 AM
  #2  
Gabbiani's Avatar
TECH Apprentice
iTrader: (20)
 
Joined: Apr 2007
Posts: 337
Likes: 6
From: Salem OR
Default

Holding the throttle steady? Unless it is an electronic throttle body and you are commanding it to open 50% this is pretty much impossible to maintain. What waste gate springs do you have?

Gates open and close - depending on the size you may see a little movement up and down.

Need to check this at WOT and log it somehow. That will give you a better read on what is going on.
Reply
Old Jun 3, 2010 | 11:15 AM
  #3  
MY99TAWS6's Avatar
Thread Starter
TECH Veteran
iTrader: (3)
 
Joined: Apr 2002
Posts: 4,719
Likes: 3
From: Kelowna,BC
Default

Yeah just holding throttle constant non electronic throttle ,high enough to get boost. I guess can log it. Mostly curious more than anything else since changing out the turbos in next few days. I guess it could be turbos,boost leak or maybe gates sticking.
Reply




All times are GMT -5. The time now is 11:47 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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