Forced Induction Superchargers | Turbochargers | Intercoolers

boost problems

Old Sep 14, 2008 | 01:17 PM
  #1  
BoostBandit's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Apr 2006
Posts: 66
Likes: 0
Default boost problems

Well, I put the my car on the dyno and I have an STS kit with a front mount. The wastegate has the 5 lb spring in it. just running off the wastegate the car made 4lbs. When I ran it through the STS boost controller ( which I have determined is a piece of crap) the car made 7 lbs, then on the next run it made 6 lbs and then went back to 4lbs. I wanted to put it up to 9 lbs but could not get a reliable boost setting. I was wanting to know if anyone has had this problem and if I get a 10lb spring and a boost controller that works if this will hopefully fix my problem.Also was wanted to know if anyone had a good diagram on how to route the boost controller on the STS kit just make sure I had it routed right. Thanks for the help.
Reply
Old Sep 14, 2008 | 01:33 PM
  #2  
OHSIXCTSV's Avatar
Banned
 
Joined: Jul 2008
Posts: 849
Likes: 0
Default

watch what u wish for...10lbs on a stocker could get ugly. did u atleast upgrade your valve springs? turbo boost should be good for 20-25 hp per psi...200-250 extra rwhp
and kaboom! (in due time) on a stock bottom end. i'm not saying not to do it, just
be sure your bank account is up to the task.
Reply
Old Sep 14, 2008 | 01:43 PM
  #3  
BoostBandit's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Apr 2006
Posts: 66
Likes: 0
Default

Well I want to go to 9lbs but I loose a pound through the intercooler. so that why I want a 10lb spring and a boost controller to adjust it to 9lbs.
Reply
Old Sep 14, 2008 | 01:50 PM
  #4  
OHSIXCTSV's Avatar
Banned
 
Joined: Jul 2008
Posts: 849
Likes: 0
Default

they say 8 is the limit on stock bottom end...
i like to think more is better too...but, i would run it on 5-6psi
for a while to gauge what "normal" should feel like befor
you go extreeem. just my .02
how does the 5lbs feel? or you havent got out on the street yet?
Reply
Old Sep 14, 2008 | 02:23 PM
  #5  
BoostBandit's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Apr 2006
Posts: 66
Likes: 0
Default

It has been on 5lbs for over a year now. And I live in colorado where the density altitude the other night on the dyno was 8,200 ft
Reply
Old Sep 14, 2008 | 06:44 PM
  #6  
Silver_TransAm's Avatar
11 Second Club
iTrader: (2)
 
Joined: Mar 2007
Posts: 608
Likes: 1
From: San Antonio, Tx
Default

I have been running 10psi on stock 112k for a while now on the street and dog the hell out of it. Just get a good tune and you will be amazed. I just wish I had a trans that could hold it.
Reply
Old Sep 14, 2008 | 06:51 PM
  #7  
OUTLAWZ RACING's Avatar
TECH Addict
iTrader: (9)
 
Joined: Mar 2004
Posts: 2,726
Likes: 1
From: COLUMBUS GA.
Default

Originally Posted by BoostBandit
It has been on 5lbs for over a year now. And I live in colorado where the density altitude the other night on the dyno was 8,200 ft
Do you loose boost on the street? Could be a load issue.
Reply
Old Sep 14, 2008 | 06:58 PM
  #8  
CanII's Avatar
Teching In
 
Joined: Aug 2008
Posts: 22
Likes: 0
Default

Originally Posted by OUTLAWZ RACING
Do you loose boost on the street? Could be a load issue.
I have seen STS kits make almost no boost on a dyno jet because of the no load issue. If it doesnt have this problem on the street that is most likely your problem.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Sep 14, 2008 | 07:57 PM
  #9  
OHSIXCTSV's Avatar
Banned
 
Joined: Jul 2008
Posts: 849
Likes: 0
Default

nothing like a mustang dyno with eddy current softwear.
the load simulation is as good as it gets.
Reply
Old Sep 14, 2008 | 10:23 PM
  #10  
BoostBandit's Avatar
Thread Starter
Staging Lane
iTrader: (1)
 
Joined: Apr 2006
Posts: 66
Likes: 0
Default

It is an eddy current dyno. The boost was just up and down because if you even bumped the boost controller it woul change the boost. But I ordered a light blue 8.7 lb spring and a good boost controller tonight. The guy I have tuning it is very good with HP tuners so the tune is the least of my worries its the 95K miles on the car that I am. But like silver said its all about a good tune.
Reply
Old Sep 14, 2008 | 11:14 PM
  #11  
CanII's Avatar
Teching In
 
Joined: Aug 2008
Posts: 22
Likes: 0
Default

You should try to pull off the boost controller all together. If the car ends up boosting what ever the W.G. spring is set at then you can eliminate your boost controller.
Reply
Old Sep 15, 2008 | 03:34 AM
  #12  
HossinatorSS's Avatar
Launching!
iTrader: (1)
 
Joined: Jun 2002
Posts: 255
Likes: 0
From: San Luis Obispo, CA
Default

It could be the WG spring. I had my kit for about a year before the spring must have taken a permanent set and would only make 5.5 instead of 6.5psi. I thought it was because i had dented the crap out of the front pipe (STS does not like eibach pro-kits!) I bought a cheapo ebay manual boost controller and used it to adjust to 6.5 psi again. It worked. Still need to buy a new spring though. Like CanII said, remove the BC and just run straight spring. According to STS you should lose about .75psi through the piping alone plus what you lose through your intercooler.
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 10:26 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