Forced Induction Superchargers | Turbochargers | Intercoolers

9lbs of boost then nothing on Vortech Ttrim

Thread Tools
 
Search this Thread
 
Old Aug 19, 2010 | 09:58 AM
  #1  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default 9lbs of boost then nothing on Vortech Ttrim

I hope someone can point me in the right direction. I recently replaced my vortech gtrim with a ttrim, basically just changed out the head unit and brackets. Since then when I get on it the boost will spike to about 9lbs then drop back down to 0. If I disconnect the vacuum line going to the bypass valve it will hold steady at 9lbs. Other than the supercharger everything is the same as when I was running the gtrim and I had no problems with it. Could this be the bypass valve.


Last edited by phatasp; Aug 19, 2010 at 02:30 PM.
Reply
Old Aug 19, 2010 | 10:05 AM
  #2  
'Trust''s Avatar
10 Second Club
iTrader: (24)
 
Joined: Aug 2004
Posts: 7,972
Likes: 4
From: Eternity
Default

Sounds like our bypass valve is messing up... 9psi what you are looking for?
Reply
Old Aug 19, 2010 | 10:24 AM
  #3  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

Thats what i was thinking. And yeah 9lbs will have to do till winter then hopefully a forged short block and more boost
Reply
Old Aug 19, 2010 | 02:56 PM
  #4  
stevieturbo's Avatar
9 Second Club
 
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Default

When on boost, it would be impossible for it go make more boost with the signal line off the BOV, than on it.

All its doing is applying positive pressure to assist the spring with keeping it closed.

With no line attached you are relying on spring pressure alone.

Are you sure everything is plumbed correctly ? What is that line going to the intake pipe before the blower ?

And is the car actually losing power, or is it just the gauge reading ?
Reply
Old Aug 19, 2010 | 03:12 PM
  #5  
'Trust''s Avatar
10 Second Club
iTrader: (24)
 
Joined: Aug 2004
Posts: 7,972
Likes: 4
From: Eternity
Default

Where is your vacuum reference for the boost gauge?
Reply
Old Aug 19, 2010 | 04:48 PM
  #6  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

Originally Posted by stevieturbo
When on boost, it would be impossible for it go make more boost with the signal line off the BOV, than on it.

All its doing is applying positive pressure to assist the spring with keeping it closed.

With no line attached you are relying on spring pressure alone.

Are you sure everything is plumbed correctly ? What is that line going to the intake pipe before the blower ?

And is the car actually losing power, or is it just the gauge reading ?
that line is going to the tube on the pass side valve cover. On the install directions for the gtrim thats where it said to route it to. And yeah it shoot up to about 9lbs then just as fast drop to 0 and fall on it,s face.
Reply
Old Aug 19, 2010 | 04:50 PM
  #7  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

Originally Posted by 'Trust'
Where is your vacuum reference for the boost gauge?
The vacuum line to the bypass valve is t,d off the brake booster line and the boost gauge is t,d off of that.
Reply
Old Aug 20, 2010 | 12:52 PM
  #8  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

I guess I,ll order a bypass valve and go from there. Thanks
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 Aug 21, 2010 | 11:26 PM
  #9  
nuckifuts's Avatar
TECH Apprentice
iTrader: (7)
 
Joined: Jul 2004
Posts: 345
Likes: 4
From: Seminole FL
Default

Why not block off the bypass before spending money on something you may not need?
Reply
Old Aug 22, 2010 | 01:38 AM
  #10  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

I was talking to a couple of people and they were saying with an automatic I might not need it, so I was thinking about giving it a shot. Anybody else have any opinions (good or bad) about this idea?
Reply
Old Aug 22, 2010 | 08:25 AM
  #11  
nuckifuts's Avatar
TECH Apprentice
iTrader: (7)
 
Joined: Jul 2004
Posts: 345
Likes: 4
From: Seminole FL
Default

Originally Posted by phatasp
I was talking to a couple of people and they were saying with an automatic I might not need it, so I was thinking about giving it a shot. Anybody else have any opinions (good or bad) about this idea?
You should definatly use one, it extends the life of the supercharger. I was saying just temporarily block it off to see it that cures your problem.
Reply
Old Aug 22, 2010 | 10:19 AM
  #12  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

I see, I did block it off and it held steady at 9lbs
Reply
Old Aug 28, 2010 | 08:01 AM
  #13  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

I think I found the problem, I took the lid off that I had custom made for me and now it cranks up to 10/11 lbs boost so I believe the opening in the lid is the culprit.
Reply
Old Aug 29, 2010 | 04:36 PM
  #14  
TransAmatt99's Avatar
On The Tree
iTrader: (24)
 
Joined: Feb 2006
Posts: 186
Likes: 1
From: Southeast ohio
Default

At what rpm did this occur? Mine is currently doing the same exact thing at 4k. I have no idea what the problem is. If I run an open inlet tube normally before it would pickup 2lbs but now it just falls on its face at all rpms?
Reply
Old Aug 29, 2010 | 09:08 PM
  #15  
phatasp's Avatar
Thread Starter
10 Second Club
iTrader: (11)
 
Joined: Nov 2008
Posts: 513
Likes: 0
Default

If I got on it pretty hard it would do it at about 4000 rpm, it would hit about 9lbs then just fall flat on it,s face. Took the lid off and now It will go about 10 or 11 lbs and hold it. Did yours just start doing it?
Reply




All times are GMT -5. The time now is 03:30 PM.

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