2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

Disable the Supercharger

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Old Sep 28, 2007 | 02:06 PM
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Ttarget's Avatar
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Question Disable the Supercharger

Ok, I have a strange question... I have an 07 ss/sc in stock form atm. I figured out that I could prevent the supercharger from generating boost by disconnecting the linkage on the bypass valve and tying the valve in the open position. So here is the question.

How much of a caniption is the computer going to have?

The diaphram will still move, the computer will still read proper presure range from the MAP, and the excess air being pushed by the SC will simply re-circulate in the intake, just not generate any boost.

This is my first "car", first 4 cyl, and first fuel injected motor to boot, I am used to v-8s and 4x4's so please forgive my newbieness. Now before I get flamed for doing the opposite of what everyone else it trying to do (get more power) here's my reasoning, on occasion I am forced to lend out my car to a co-worker and my boss. I don't want anyone other than me beating on my car.
Also in winter it should make the HP curve more linear and therfor less twitchy by slowing the throttle response. I will be learning how to drive a 2wd car in winter and want to start out on something gutless, then later in the winter I will reconnect the linkage and enable the supercharger.

Any thoughts and comments besides "man this guy is an idiot" I hear that enough already
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Old Sep 28, 2007 | 02:09 PM
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i dont think i'd do it.
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Old Sep 28, 2007 | 02:11 PM
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welcome. its a creative idea ill give you that. but i dont know what could happen down the road for you and doing this
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Old Sep 28, 2007 | 02:13 PM
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well, i would suggest not stepping on the gas pedal so hard. you can accelerate through the gears without hitting any boost at all. and if you think your boss or co-worker or whoever is beating on your car, tell them they can't use it anymore. problem solved.
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Old Sep 28, 2007 | 02:14 PM
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the motor makes about 130 ponies with the supercharger not making boost.
i woudnt reccomend playin with it though.
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Old Sep 28, 2007 | 02:14 PM
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the computer knows a supercharger is supposed to be there. After prolonged use I can only imagine bad things happening ie cels that wont go away maybe even limp mode (yikes)
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Old Sep 28, 2007 | 02:20 PM
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just tell your boss an co-worker to **** off and drive there own car... how are your forced to let them use it?... f that yo!
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Old Sep 28, 2007 | 02:21 PM
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Originally Posted by Ttarget
Ok, I have a strange question... I have an 07 ss/sc in stock form atm. I figured out that I could prevent the supercharger from generating boost by disconnecting the linkage on the bypass valve and tying the valve in the open position. So here is the question.

How much of a caniption is the computer going to have?

The diaphram will still move, the computer will still read proper presure range from the MAP, and the excess air being pushed by the SC will simply re-circulate in the intake, just not generate any boost.

This is my first "car", first 4 cyl, and first fuel injected motor to boot, I am used to v-8s and 4x4's so please forgive my newbieness. Now before I get flamed for doing the opposite of what everyone else it trying to do (get more power) here's my reasoning, on occasion I am forced to lend out my car to a co-worker and my boss. I don't want anyone other than me beating on my car.
Also in winter it should make the HP curve more linear and therfor less twitchy by slowing the throttle response. I will be learning how to drive a 2wd car in winter and want to start out on something gutless, then later in the winter I will reconnect the linkage and enable the supercharger.

Any thoughts and comments besides "man this guy is an idiot" I hear that enough already
You can disable the supercharger with HPTuners. Also, there is a couple ways to swap some vaccum hoses so that way the by-pass valve will always be open and the boost will bever build. But the car is sooo slow that way, kinda 130 isshh HP. You'd be better not to mess with it.
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Old Sep 28, 2007 | 02:22 PM
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yea but then you basically paid 20,000 or more for an lt cobalt
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Old Sep 28, 2007 | 02:29 PM
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im still all for telling them to **** off lol... thats just me and driving these cars in the snow isnt that bad.. i did it with bald summer tires last year lol.. i wouldnt recomend any thing over like an inch tho lol
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Old Sep 28, 2007 | 02:32 PM
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you can wire open the bypass valve, or through hpt, you can remove all boost through the ecm.

also, it will not throw a fit. it will just be slow. this will also cause you to run stupid rich at wide open unless compensated for it.

Last edited by Area47; Sep 28, 2007 at 02:32 PM. Reason: Automerged Doublepost
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Old Sep 28, 2007 | 03:06 PM
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nobody's suggested just re-routing the belt?
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Old Sep 28, 2007 | 03:11 PM
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Originally Posted by Area47
you can wire open the bypass valve, or through hpt, you can remove all boost through the ecm.

also, it will not throw a fit. it will just be slow. this will also cause you to run stupid rich at wide open unless compensated for it.
nod... you better be ready to tune it... gonna be all sorts of fucked up removing air thats expected from the equation...
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Old Sep 28, 2007 | 03:24 PM
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Originally Posted by Acidangel_5.0
nod... you better be ready to tune it... gonna be all sorts of fucked up removing air thats expected from the equation...
good point that makes this pretty much a bust since you wouldn't be able to quickly jump in jump out at will
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Old Sep 28, 2007 | 03:33 PM
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From: wappingers
Originally Posted by bc3tech
nobody's suggested just re-routing the belt?
I THINK HE WANTED A QUICK FIX KIND OF THING SO WHEN HE GETS TO WORK HE CAN DO IT AN WHEN HE LEAVES HE CAN PUT IT BACK TO STOCK.... sorry for the caps lol but im not retyping that lol
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Old Sep 28, 2007 | 04:11 PM
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get a boost controller.
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Old Sep 28, 2007 | 04:14 PM
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you cant get a boost controller for these cars
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Old Sep 28, 2007 | 04:25 PM
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sure you can
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Old Sep 28, 2007 | 04:35 PM
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definately tell them to drive their own cars.. id laugh if my boss or co-worker told me to let them drive my car
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Old Sep 28, 2007 | 04:37 PM
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From: Still fixing others mistakes.
Originally Posted by bc3tech
nobody's suggested just re-routing the belt?
might as well add this to the shiney post




to the op. when you disable the blower, you're not taking into effect what happens when you enter PE, or wot mode. it is going to dump fuel, it's not going to be happy.

tape a block of wood under the pedal. or just realize you have a warranty for a reason.
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Old Sep 28, 2007 | 05:59 PM
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explain then 07baltss. Its belt driven
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Old Sep 28, 2007 | 06:04 PM
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yea im pretty sure you can use a boost controller.. and i think someone had done it actually... serves no purpose but he did it lol..

Originally Posted by 07MetallicSC
explain then 07baltss. Its belt driven
sure its belt driven but there is a bybass valve.. works just like a wastegate..

Last edited by 0redline6; Sep 28, 2007 at 06:04 PM. Reason: Automerged Doublepost
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Old Sep 28, 2007 | 06:18 PM
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Fuuuuck people.... yes you can use a boost controller....
I had my buddies Apex-i Avc-r in my car for a week... it controls boost very well.

And no... making the super not boost won't mess with the car at all... like I said, I dove with a boost controller for a week.... most of the daily driving was done with the boost set to zero. Actually, under heavy throttle, the by-pass valve can't keep up, so you still see about 3-5psi in the manifold.
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Old Sep 28, 2007 | 10:41 PM
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I say its not a bad idea I have an 04 GT mustang with a K/B 2.1 on the boost bypass valve there is a linkage position for full bypass all the time called valet mode no boost doesn't hurt a thing.
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Old Sep 29, 2007 | 02:01 AM
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From: wappingers
Originally Posted by 07MetallicSC
you cant get a boost controller for these cars
Originally Posted by Omega_5
Fuuuuck people.... yes you can use a boost controller....
I had my buddies Apex-i Avc-r in my car for a week... it controls boost very well.
TOLD YOU!!!! lol sorry had to!
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