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Old 04-08-2009, 12:25 AM   #1
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ls3 power cap?

i just drove a gt 500 and the 500 hp was nice. can the ls3 handle a blower? i want to know if and how much power can be added without changing anything except adding a blower?
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Old 04-08-2009, 12:51 AM   #2
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there are plenty of blown LS3 vettes. Best bet would probably be to check out some vette forums for actual numbers.
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Old 04-08-2009, 02:20 AM   #3
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how many miles are you looking for the engine to last?
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Old 04-08-2009, 10:16 AM   #4
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No problems with a blower designed for the car. If you modify it and run more boost, then you will be asking for trouble.
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Old 04-08-2009, 10:19 AM   #5
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From what I have read, the Tremec Tranny of the 2SS can handle 700lbs of torque. So I imagine that the rest of the drive train is inline with a few tweeks maybe.
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Old 04-08-2009, 10:38 AM   #6
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Absolutely! There are plenty of blown LS motors out there! Lots in the corvettes and dont forget the GTO's and G8's. These engines make big increases with bolt on parts. A blower like a magnuson with 4-5 lbs of boost will be in the 550HP range.
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Old 04-08-2009, 11:30 AM   #7
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I've checked out a few web sites for companies that do after market mods for cars. They all basically offer a supercharger package for the LS3 vettes. I see the numbers range from 550 hp to 650 hp in the $8K to $14K range.
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Old 04-08-2009, 01:09 PM   #8
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The GT500 will pale in comparison to a blown LS3... You'll love it.
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Old 04-08-2009, 03:38 PM   #9
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Quote:
Originally Posted by THE EVIL TW1N View Post
no it won't. the GT500 with an aftermarket blower comparable to whatever you throw on the LS3 will push ~700 rwhp on pump gas without breaking a sweat. A blown LS3 will have trouble topping 550 rwhp and sustaining reliability. Even GT500's with their stock blower can hit the 550 rwhp range. The 5.4 S/C is a pretty serious engine. When your trying to compare a stout engine engineered for boost against an N/A engine with a blower slapped on, the comparison will get ugly.

But If your talking about a stock GT500 compared to a blown LS3, then that's different.
Agreed, that 5.4 LOVES boost. Now, I would like to see a blown LS3 with a fully forged bottom end vs. upgraded blower GT500. Hey I can dream right...
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Old 04-08-2009, 04:29 PM   #10
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I know a guy that put an $8,000 procharger on his LS2 '07 Vette and he's pushing somehwere around 538hp to the wheels...
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Old 04-08-2009, 04:33 PM   #11
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Quote:
Originally Posted by speedster View Post
Obviously your opinion is weighted with your knowledge/ownership of a Cobra - that's fine. But without any factual data on the LS3, it's just opinion. Not slamming, just separating facts from opinion. The 5.4 S/C IS a great motor. The LS3 has limits as does the 5.4. But it's never truly an apples to apples comparison. We can and will modify these cars from day one and this debate will rage on for years to come. Chevy vs. Ford. Enjoy them both before S-247 tries to take them away...
From Evils post, I just got that the 5.4 comes with a built engine from the factory and you can boost it much higher because of this which will result in bigger HP / TQ ..... You would have to do a lot more to the LS3 to match the HP you can make with stock internals 5.4 engine in the Gt500 ...

I think all of the above would be fact and not speculation ..

I think Evil was also not replying to the OP . he was replying to the post from HOOY that says:

"The GT500 will pale in comparison to a blown LS3... You'll love it. "

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Old 04-08-2009, 04:42 PM   #12
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Quote:
Originally Posted by SSINSTR View Post
Agreed, that 5.4 LOVES boost. Now, I would like to see a blown LS3 with a fully forged bottom end vs. upgraded blower GT500. Hey I can dream right...
Forged bottom end ls3 = ls9
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Old 04-08-2009, 04:45 PM   #13
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Quote:
Originally Posted by Crowley View Post
From Evils post, I just got that the 5.4 comes with a built engine from the factory and you can boost it much higher because of this which will result in bigger HP / TQ ..... You would have to do a lot more to the LS3 to match the HP you can make with stock internals 5.4 engine in the Gt500 ...

I think all of the above would be fact and not speculation ..

I think Evil was also not replying to the OP . he was replying to the post from HOOY that says:

"The GT500 will pale in comparison to a blown LS3... You'll love it. "

Crowley
No problem. Just wanted to know what LS3 data there was. I agree that the 5.4 is a great motor. I will rephrase it since I am not trying to be negative - does anyone have factual data on how far an LS3 can be pushed yet?
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Old 04-08-2009, 05:00 PM   #14
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Quote:
Originally Posted by speedster View Post
Obviously your opinion is weighted with your knowledge/ownership of a Cobra - that's fine. But without any factual data on the LS3, it's just opinion. Not slamming, just separating facts from opinion. The 5.4 S/C IS a great motor. The LS3 has limits as does the 5.4. But it's never truly an apples to apples comparison.
Well, the facts are, and this is not really up for debate, a stock LS3 motor can only support a certain level of power before it breaks or becomes unreliable. We can debate all day what that number might be, but you cannot debate that the stock 5.4L engine that comes in the GT500 will support much more power before it reaches a similar breaking point.

Yes, absolutely you can build a LS3 with forged internals that will support as much, if not more, than the stock 5.4L engine, but there is a cost associated with doing so. Could you have a SS Camaro making more horsepower than a GT500 with a total cost (price to get into the vehicle, parts, labor, dyno time for tuning, tune cost, etc.) than what it would cost you to buy a 2010 GT500? Sure, but I would hazard to say the difference would be much less than you think it would once everything was added up.

Quote:
Originally Posted by Chevyrocker View Post
I know a guy that put an $8,000 procharger on his LS2 '07 Vette and he's pushing somehwere around 538hp to the wheels...
I know a guy who put a $5800 Kenne Bell on his otherwise bone-stock GT500 and made over 650rwhp on 93 octane and the largest pulley (i.e. the least boost) that comes with the kit. (3.25", for the record). In fact, I know many who have done the same with equal or better results.

Quote:
Originally Posted by Crowley View Post
From Evils post, I just got that the 5.4 comes with a built engine from the factory and you can boost it much higher because of this which will result in bigger HP / TQ ..... You would have to do a lot more to the LS3 to match the HP you can make with stock internals 5.4 engine in the Gt500 ...

I think all of the above would be fact and not speculation ..

I think Evil was also not replying to the OP . he was replying to the post from HOOY that says:

"The GT500 will pale in comparison to a blown LS3... You'll love it. "

Crowley
I would agree with that assumption.

Quote:
Originally Posted by fdjizm View Post
.. but i did read somewhere the stock injectors max out around 680hp... but thats about the only thing holding it back from 700 with bolt on's lol
Hmmmm...I make more than that at the wheels on my stock injectors and I'm nowhere close to their max duty cycle. I know there are GT500's making over 800rwhp on the stock injectors, too.

Last edited by garagelogic; 04-08-2009 at 05:29 PM.
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Old 04-08-2009, 05:41 PM   #15
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Quote:
Originally Posted by speedster View Post
No problem. Just wanted to know what LS3 data there was. I agree that the 5.4 is a great motor. I will rephrase it since I am not trying to be negative - does anyone have factual data on how far an LS3 can be pushed yet?
Not sure ... but If it hasn't Im sure some of us are about to push that envelope ... I can see a turbo with 8psi pushing about 600 rwhp .... ... I'll say that the same top mounted blower will see about 550 - 575 and still be streetable and safe (with a nice safe tune) ..

I can't wait to see what it will do without having to go internal to replace stuff !!!!

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Old 04-08-2009, 05:43 PM   #16
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I notice the Mustang guys love the apples to $hit comparisons. Forget Apples to oranges that was 10 steps ago. Make a post about hp and bam,bam,bam here are the Ford guys responding. Everyone's car makes 700hp on the internet.

To clear everything up in this thread:

Yes a $45-50K Mustang with a fully forged motor, aftermarket blower and various mods will make more power than a stock LS3 ($30-35K)with a blower slapped on it.

I seem to know of a stock vette motor that makes 640hp............. I mean if the GT500 can be compared to the SS, why not the ZR1 to the GT500?

I agree.
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Old 04-08-2009, 05:45 PM   #17
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The lower the compression the better off you are when supercharging, there are plenty of kits out there designed for the LS motors that will not hurt you motor. Without checking I think the Shelby is about 8.1 compression so they can use more psi. Just check your local track they fly with just a pully change, exhaust, filter, computer download. I have seen them run from the high 11's to the very low 12's.
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Old 04-08-2009, 05:59 PM   #18
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The high end Lingenfelter probably will be the best pro shop Camaro mod. Don't know what they plan for the engine. The list is around here somewhere.

If anyone will get the most they will.
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Old 04-08-2009, 06:00 PM   #19
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So, don't let it get personal and stay on topic. This is about the LS3, nothing else...
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Old 04-08-2009, 06:01 PM   #20
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Here is there proposed best LS3 Package stats.

Quote:
650 HP Supercharged TVS2300
LS3 6.2 L Forged pistons
Automatic or manual transmission
Lingenfelter air intake system
Corsa cat back exhaust
http://www.lingenfelter.com/LPEforum...read.php?p=257

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Old 04-08-2009, 06:19 PM   #21
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Here is there proposed best LS3 Package stats.



http://www.lingenfelter.com/LPEforum...read.php?p=257
Nice .. btw .. Maybe something to this .. here are a few of the packages .. notice the 2nd package is where they start to show the Forged Pistons ..

570 HP Supercharged TVS1900
LS3 6.2 L manual transmission
Lingenfelter air intake system
Corsa cat back exhaust

650 HP Supercharged TVS2300
LS3 6.2 L Forged pistons
Automatic or manual transmission
Lingenfelter air intake system
Corsa cat back exhaust
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Old 04-08-2009, 06:26 PM   #22
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The next package they are proposing is an LS7 block with 700 HP so. Probably 650 would be a good bet that's about it for the LS3.

Of course that's a 180mph vehicle or more it's insane power.
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Old 04-08-2009, 06:33 PM   #23
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well if price is not an issue, then why not compare the zr1 to a 725hp super snake ?

Oh god now you want to drag third party cars into it? When will it stop?

The problem is this: Its hard being on the receiving end. For the last 6 years there has been no Camaro, so HP didn't matter in the GT. Now the Camaro came back (and Challenger)and put a hurting on Mustang's GT. I know if I was a Ford guy I would be reaching at straws to say why my car was better too. That's why every Camaro SS/LS3 discussion has the GT500 mentioned somewhere in the thread. Anyone that removes their blue oval colored glasses can see what is meant to be compared:

V-6 to V-6

SS to GT

and if it comes out

Z28 to GT500

I have to admit it brings a smile to my face that the Mustang supercar is being compared to the $30K SS. I also like the guy that wants to take a guess at the average transaction price of a car that still isn't even out yet.
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Old 04-08-2009, 07:15 PM   #24
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LOL .. ok guys .. lets keep to the OPS post and quit bashing .. lol

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Old 04-08-2009, 07:25 PM   #25
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To answer the original poster. The LS3's power cap is 1 horsepower shy of the 5.4 Ford's power cap.
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