Modded LS2 versus Modded LS3
Thread Starter
Navigator
Joined: Nov 2007
Posts: 9
Likes: 0
) I'm just trying to learn more about these cars and there capabilities.
Safety Car
Joined: Aug 2004
Posts: 4,067
Likes: 62
From: Houston Texas
The vettes running 11's and 10's typically are limited to traction not the car. There are many on this forum who run in the 9's and a couple in the 8's. It's all about getting the power to the ground and sticking. A 750rwhp car is going to run high 10's with street tires and mid 9's with DR's.
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Burning Brakes
Joined: Sep 2006
Posts: 1,100
Likes: 350
From: Auburn Mass
Hello everyone, this is my first post. I have a 07 Z51 coupe that I am prepared to mod. I am beginning to get cold feet. Specifically, I am wondering if the LS3 motor is that much better than the LS2. From what I gather so far, stock versus stock, the LS3 should win 10 out of 10 times with the drivers being fairly equal. Now my question is this, what about heavily modded? Take an LS2 versus LS3 with headers, CAI and supercharger or h/c cars. I'm guessing the LS2 will make approximately 500rwhp while the LS3 will make about 540rwhp. With this being the case, is it now a drivers race because the horsepower has surpassed what the car is capable of? Basically, is there no real performance difference between the 2 when heavily modded. Whereas stock the LS3 would win everytime with equal drivers, would that now no longer be the case?
Safety Car
Joined: Jun 2004
Posts: 4,430
Likes: 81
From: Whidbey Island WA
I was kidding John. Making fun of some Z06 owners who think their car is better than anything no matter what. You are however aware that FI base cars are often not killing Z06s on a regular basis despite the disparity in power? The Z has a very good overall balance that gives it performance that belies its HP numbers. Give credit where credit is due.
Pro
Joined: Apr 2007
Posts: 663
Likes: 0
From: Arvada CO
If you just want a little more grunt for some street fun, then stick with what you have, but on a true CAI, long tube headers, a Fast Intake/ported TB, hi flow cats, a good tune, and some gears and let her rip. There will be more than enough power there for that.And you will save money if what you are suggesting is dump the 07 for an 08. You will take a bath on resale - and what you would pay extra for the 08 will more than cover these bolt on mods.
Racer
Joined: Sep 2004
Posts: 368
Likes: 0
From: Melbourne FL
Welcome....
Based on what I am hearing, the LS3 block is stronger. Specifially has a better bulkhead design. True they do not have a decent program for the heads, but that is just a matter of time. LG Motorsports are making over 500rwhp with A6 auto's. The LS3 repersents the way things will be.
The '08 ain't bad either. Improved steering, the A6 auto shifts with 18,000th of a sec (hugh improvement over the 06-07) The 6spds are greatly improved too.
The way I see it, trade yours before it gets worse and start over with an 08, IMHO.
Another thought... LS3 is very close behind the LS7. In fact I would say that is a better performance compairson (flame suit on for the Z06 owners) A modded LS3 and a Modded LS7 are just a few ponys apart. (except for the handling) Think about that when you write a check for $45-50K for your coupe vs. the $70K++ for the Z06.
Based on what I am hearing, the LS3 block is stronger. Specifially has a better bulkhead design. True they do not have a decent program for the heads, but that is just a matter of time. LG Motorsports are making over 500rwhp with A6 auto's. The LS3 repersents the way things will be.
The '08 ain't bad either. Improved steering, the A6 auto shifts with 18,000th of a sec (hugh improvement over the 06-07) The 6spds are greatly improved too.
The way I see it, trade yours before it gets worse and start over with an 08, IMHO.
Another thought... LS3 is very close behind the LS7. In fact I would say that is a better performance compairson (flame suit on for the Z06 owners) A modded LS3 and a Modded LS7 are just a few ponys apart. (except for the handling) Think about that when you write a check for $45-50K for your coupe vs. the $70K++ for the Z06.
Last edited by ForcedVette; Dec 3, 2007 at 12:05 AM.
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Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
It's all relative...in Greenwich, CT or out in East Hampton Long Island, C6 Z06s (even base C6s) are far more rare than a Ferrari F355/F360 or Aston Martin. 
Heck, a lime green Yugo with purple polka dots is rarer than any Ferrari no matter where you're at.
Heck, a lime green Yugo with purple polka dots is rarer than any Ferrari no matter where you're at.
Pro
Joined: Mar 2007
Posts: 585
Likes: 0
From: Coral Springs Florida
Welcome to the forum, for all practical purposes it really doesn't matter, don't lose 5-10k to gain a few extra hp. Like he said there will ALWAYS be someone faster than you. With a s/c, headers, and cam you will make more power than you could ever control so what difference does it make if it says LS2 or 3? Your car has all the potiential that you can handle so enjoy blowing your $$$ 
