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Supercharged LS3, or LS7... Driven both? Step inside.

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Old 04-06-2011, 12:10 PM
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svoshop
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Default Supercharged LS3, or LS7... Driven both? Step inside.

Guys,

I have a little dilema. I have a 2011 Supersonic Blue GS on order. 4lt, blue stich, manual 6 etc...

I do not have room for the car. I have thought heavily about selling my Z06, or trading to make room. My current Corvettes are a 2010 ZR1, a 2009 Z06, and a 2001 C5 Twin Turbo.

I also have a Camaro SS ( which I think is getting traded )...

I know I will love the opportunity to take the top back off. I really miss that with the Z06, but I am trying to convince myself that a boosted GS will feel just as good and strong as my Z06.

The reason I think the Z06 is the one to go, is that I have a very fair offer on the table.

Does anyone care to share some thoughts. I have searched the forum, and really can't get good comparison info on the FI GS vs Z06.

I really dont want to rent storage spots any more. This is part of the reason we built a new house, but I did not make the garage big enough...

Thanks

Mike
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Old 04-06-2011, 12:21 PM
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redls3
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forced induction grandsport should be compared to your zr1 not the z06.


the supercharged GS will be ALOT faster then the z06.
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Old 04-06-2011, 12:32 PM
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cthusker
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Originally Posted by RedLs3
forced induction grandsport should be compared to your zr1 not the z06.


the supercharged GS will be ALOT faster then the z06.
and have proven it a few times! Mines bone stock and only an LS2 running very mild boost so you get the idea.

You will be into ZR1 type numbers with mild boost and nothing more....
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Old 04-06-2011, 12:42 PM
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ECS just did a supercharger installation on an grandsport and made 699rwhp and 645rwtq. thats ony with headers, stock exhaust and meth kit.


thats 803hp to the crank enough to blow the doors off a z06 and zr1.

maybe you should sell the zr1 and zo6
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Old 04-06-2011, 12:44 PM
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nc_c5
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Originally Posted by cthusker
and have proven it a few times! Mines bone stock and only an LS2 running very mild boost so you get the idea.

You will be into ZR1 type numbers with mild boost and nothing more....

cthusker,

What supercharger are you running and how much boost?
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Old 04-06-2011, 12:53 PM
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svoshop
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So you are saying I would not miss the Z06...

Mike
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Old 04-06-2011, 12:55 PM
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if you supercharged the GS with East coast supercharging you would not miss the z06 or the zr1.


you would plain and simple have a much faster car then both
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Old 04-06-2011, 01:05 PM
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FloydSummerOf68
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Originally Posted by RedLs3
if you supercharged the GS with East coast supercharging you would not miss the z06 or the zr1.


you would plain and simple have a much faster car then both


The supercharged LS3 with tuning and the normal supporting mods will outrun the ZR1
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Old 04-06-2011, 01:17 PM
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A heavily modded anything LSx will outrun most stock LSx motor (talking in a straight line). Your twin turbo C5 would probably out run the ZR1. I've seen blown LS1/LS6 motors that can out run a stock ZR1

No brainer if you ask me and are looking for the fastest

Last edited by FrankTank; 04-06-2011 at 01:25 PM.
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Old 04-06-2011, 01:22 PM
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Originally Posted by FloydSummerOf68


The supercharged LS3 with tuning and the normal supporting mods will outrun the ZR1
In a straight line.
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Old 04-06-2011, 01:26 PM
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Originally Posted by svoshop
Guys,

I have a little dilema. I have a 2011 Supersonic Blue GS on order. 4lt, blue stich, manual 6 etc...

I do not have room for the car. I have thought heavily about selling my Z06, or trading to make room. My current Corvettes are a 2010 ZR1, a 2009 Z06, and a 2001 C5 Twin Turbo.

I also have a Camaro SS ( which I think is getting traded )...

I know I will love the opportunity to take the top back off. I really miss that with the Z06, but I am trying to convince myself that a boosted GS will feel just as good and strong as my Z06.

The reason I think the Z06 is the one to go, is that I have a very fair offer on the table.

Does anyone care to share some thoughts. I have searched the forum, and really can't get good comparison info on the FI GS vs Z06.

I really dont want to rent storage spots any more. This is part of the reason we built a new house, but I did not make the garage big enough...

Thanks

Mike
BOY, that's a tough problem. I WISH I had that problem.
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Old 04-06-2011, 01:31 PM
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Originally Posted by Skimball
In a straight line.


i can say the gs will handle almost as good as the zr1 in the twisties.. and i have driven both

throw in a pair of coilovers from pfadt or lg motorsports for under 2 grand and you have a car that will handle better then both the z06 and zr1.


gm designed there base models too good and practically identical to there more costly brothers
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Old 04-06-2011, 01:32 PM
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A blowin motor will out pull a stock Z06 hands down, and will be tame until you hit the go pedal, more so than the ZR1, unless you do the Edlebrock blower as it is similar to the one in the ZR1
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Old 04-06-2011, 01:50 PM
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I have a stock Z06 with the exception of a Vette-Air scoop. A friend has a GS with a TVS2300 Maggie at 7 psi, mild cam, long tubes and a conservative tune for 91 octane. He makes 603 HP at the wheels. I make 445 HP at the wheels. Even without the cam, and long tubes, he would make around 525-530 HP at the wheels.

Coming out of turn two at Talladega at 120 MPH he pulls on me all the way down the 4,000 ft back stretch.
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Old 04-06-2011, 02:05 PM
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stoessjc
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How much of that power can you get to the ground? I bet 0-60 times are not noticeably different and 1/4 mile is a little faster. Also, the Z06 and ZR1 are built as a system to handle the power output from their motors. You slap a s/c on a LS3 system and you will decrease the life of the engine, clutch, transaxle, halfshafts, joints, etc. You don't get something for nothing, and you don't increase the power output of the motor by 25% to 50% without a decrease in reliability and durability.

That said, I am thinking about the Edelbrock s/c for the LS3. Sweet package, very professionally designed, looks factory installed when done. Not to mention that s/c whine - music to my ears!
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Old 04-06-2011, 02:30 PM
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Depends on what type of blower you are going with. Personally I don't think you would miss anything but the Z notoriety. I know its not a Z06 but with a blower the GS will be faster. You can always add some Z suspension parts to make it ride more like the Z and you can take the top off. I personally am not a fan of the Edlebrock at all. I would go with the ECS kit. Much more room to grow. I would think the E-brock kit would make the GS somewhere inbetween the Z06 and ZR1. A ECS kit would be much more powerful than both. The Edlebrock kit would be the last blower I would choose. I also like the maggie's but when you up the boost the low end tqe is so high no matter what tires you get you won't hook up. The centri's torque curve is much more to my liking and there is ton's of room to grow. Just my $.02
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Old 04-06-2011, 02:32 PM
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Originally Posted by JoesC5
I have a stock Z06 with the exception of a Vette-Air scoop. A friend has a GS with a TVS2300 Maggie at 7 psi, mild cam, long tubes and a conservative tune for 91 octane. He makes 603 HP at the wheels. I make 445 HP at the wheels. Even without the cam, and long tubes, he would make around 525-530 HP at the wheels.

Coming out of turn two at Talladega at 120 MPH he pulls on me all the way down the 4,000 ft back stretch.
My Z06 puts down 540whp, with longtubes, intake, small cam and a tune. With the weight difference between a Z06 and GS (especially a supercharged GS) it is going to take more power from a GS to equal the straight line capabilities of a Z06. Not to mention the fact that you could also put a supercharger on a Z06.

Point being, you can get similar power as a low to mid boosted GS from a Z06 and stay NA; all while having less weight. Equal mods, the Z06 is a better car than the GS all day long.

But, in your situation, you already own a ZR1. I would do intake, longtubes, cam, tune on the GS to stay NA and have a removable roof. And keep the ZR1 for the forced induction fixed roof.

Last edited by Iceman427; 04-06-2011 at 02:57 PM.
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Old 04-06-2011, 02:50 PM
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Originally Posted by RedLs3



ECS just did a supercharger installation on an grandsport and made 699rwhp and 645rwtq. thats ony with headers, stock exhaust and meth kit.


thats 803hp to the crank enough to blow the doors off a z06 and zr1.

maybe you should sell the zr1 and zo6
What else does that Vette have because the rest of the driveline aint gonna take that for long,guaranted.
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Old 04-06-2011, 04:26 PM
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Originally Posted by stoessjc
How much of that power can you get to the ground? I bet 0-60 times are not noticeably different and 1/4 mile is a little faster. Also, the Z06 and ZR1 are built as a system to handle the power output from their motors. You slap a s/c on a LS3 system and you will decrease the life of the engine, clutch, transaxle, halfshafts, joints, etc. You don't get something for nothing, and you don't increase the power output of the motor by 25% to 50% without a decrease in reliability and durability.

That said, I am thinking about the Edelbrock s/c for the LS3. Sweet package, very professionally designed, looks factory installed when done. Not to mention that s/c whine - music to my ears!
I believe the Grand Sport with the dry sump LS3 and the manual trans has the same clutch, and differential as the Z06. I believe the transmission is the same, other then the gear ratios.

I also think the E-Force on the GS dry sump with the manual trans, is a great way to go. The extra ~200 lbs of weight(vs the Z06) is offset by an additional 20 horses. ~500 whp with the S/C'd GS vs 445 whp with a stock Z06. That makes up for the additional weight plus some.

Last edited by JoesC5; 04-06-2011 at 04:30 PM.
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Old 04-06-2011, 04:28 PM
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Originally Posted by nc_c5
cthusker,

What supercharger are you running and how much boost?
E-Force and about 7lbs at max... I'm happy with the amount of power and do have concerns how much the stock drive line can handle. Not into replacing a lot of very expensive parts but hey... if you have deep pockets then it really doesn't matter. With a pulley change and fuel pump upgrade can get another 50 hp pretty easy. That would bring me to around 575 rwhp but for now I'm satisfied. Have ZERO plans for building a 600+rwhp monster so the E-Force was perfect for what I wanted. I also do not like the sound http://www.youtube.com/watch?v=H2-z3...eature=related of the centri system. Reminds of whistling tea pot but then some really like it.... to each their own!

Last edited by cthusker; 04-06-2011 at 04:42 PM.
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