LS2 vs LS3 differences? - Corvette Forum

Go Back   Corvette Forum > C6 Corvette, 2005 - 2013 > C6 Corvette General Discussion
Log In 
Register FAQ Search Today's Posts Mark Forums Read Vendor Directory
Search

C6 Corvette General Discussion
General C6 Corvette Discussion not covered in Tech Sponsored by
PFYC

LS2 vs LS3 differences?

Reply
 
 
 
 
Thread Tools Search this Thread
Old 05-05-2011, 06:18 PM   #1
theradioflyer
Supporting Vendor
 
theradioflyer's Avatar
 
Member Since: Jul 2010
Location: Grass Lake Texas
Posts: 6,125
Default LS2 vs LS3 differences?

I'm looking for a breakdown in the differences between the LS2 and LS3 motors. I haven't driven either extensively but I'm told by those who have that the LS3 drives like it has a LOT more power than the LS2....much more than the ~30hp advertised.

At the moment, I'm looking to upgrade from my blown 97 (recently totaled after a minor accident) to a 2005 model. I will no doubt be tinkering with performance all around including a planned E-force SC, Blower can, full exhaust and possibly some additional internal engine work.

I'm wondering if it's worthwhile to spend the extra $$ for an LS3 car or if minor work will make the LS2 comparable.
theradioflyer is offline   Reply With Quote
Old 05-05-2011, 06:22 PM   #2
Purdue
CF Senior Member
 
Purdue's Avatar
 
Member Since: Apr 2005
Location: ---Phoenix, AZ --- Boiler Up, Hammer Down!
Posts: 3,216
Default

I could tell a noticeable difference between my old 2006 LS2 compared to my current 2009 LS3. Extra HP and TQ along with better gearing 2.56 vs. 2.73 makes a difference.

BTW this thread is going to get interesting .
Purdue is offline   Reply With Quote
Old 05-05-2011, 06:28 PM   #3
chris12.8
CF Senior Member
 
chris12.8's Avatar
 
Member Since: Jul 2010
Posts: 385
Default

chris12.8 is offline   Reply With Quote
Old 05-05-2011, 06:59 PM   #4
Raazor
m0K.Mc3BƎƎr's Minion
St. Jude Donor '08-'09-'10-'11-'12-'13x3- '14-'15
Support Corvetteforum!
 
Raazor's Avatar
 
Member Since: May 2008
Location: Home Again, Home Again, Jiggity Jig :)
Posts: 46,312
Default

driven both. noticeable HP difference for sure. had to blow my LS2 to cure the issue.

Raazor is offline   Reply With Quote
Old 05-05-2011, 07:17 PM   #5
Medicdiver
CF Senior Member
St. Jude Donor '13
 
Member Since: Apr 2011
Location: Davis Junction Illinois
Posts: 101
Send a message via AIM to Medicdiver
Default

Not to highjack the thread but this questions goes along with it. Can a 2005-2007 LS2 car be replaced by a LS3 engine without major electrical work? Are they a direct swap?
Medicdiver is offline   Reply With Quote
Old 05-05-2011, 07:17 PM   #6
LoganVette
CF Member
 
Member Since: Aug 2003
Location: Las Vegas NV
Posts: 51
Default

Here is a link to a dyno thread that compares the ls2 & ls3 with similar bolt ons.

http://forums.corvetteforum.com/c6-t...-cold-air.html
LoganVette is offline   Reply With Quote
Old 05-05-2011, 07:21 PM   #7
PaulB
CF Senior Member
 
PaulB's Avatar
 
Member Since: May 2002
Location: West Des Moines Ia
Posts: 1,954
Default

I had an LS2 06 and went to an LS3 09. The LS3 is stronger performance wise but it also gets less gas milage. The LS2 runs smoother, the LS3 runs a little roughter. I am told thats because of a stronger Cam. I will still take the LS3 over the LS2.
PaulB is offline   Reply With Quote
Old 05-05-2011, 07:23 PM   #8
Mike Campbell
CF Senior Member
 
Mike Campbell's Avatar
 
Member Since: Jan 2002
Location: Ft. Myers FL
Posts: 3,787
Send a message via AIM to Mike Campbell
Default

I do agree ( and also wish I had one) the LS3's are an upgrade and a superior engine than the LS2. However, for ALL the extra horsepower and torque, I must ask, why aren't they faster???
Perhaps, the LS3's are what they say, and we poor schmuck LS2's are maybe, underated or maybe even just plain lucky. I could live with that!
Mike Campbell is offline   Reply With Quote
Old 05-05-2011, 07:31 PM   #9
JoesC5
CF Senior Member
 
Member Since: Sep 1999
Location: Springfield MO
Posts: 30,227
Default

Quote:
Originally Posted by PaulB View Post
I had an LS2 06 and went to an LS3 09. The LS3 is stronger performance wise but it also gets less gas milage. The LS2 runs smoother, the LS3 runs a little roughter. I am told thats because of a stronger Cam. I will still take the LS3 over the LS2.
I thought that the LS3 owners(with skinny butts) were getting 32-33 MPG on the highway. What are the LS2 owners getting?
JoesC5 is offline   Reply With Quote
Old 05-05-2011, 07:40 PM   #10
Medicdiver
CF Senior Member
St. Jude Donor '13
 
Member Since: Apr 2011
Location: Davis Junction Illinois
Posts: 101
Send a message via AIM to Medicdiver
Default

I just drove from NYC to Chicago (900 miles) and got an average of 27.3mpg. Some of that was in 5th gear due to hills, and some was slower (55mph) due to construction.

2005 05 Z51, 6spd.
Medicdiver is offline   Reply With Quote
Old 05-05-2011, 07:49 PM   #11
jmoffett
CF Senior Member
 
jmoffett's Avatar
 
Member Since: Jan 2010
Location: Western Arkansas
Posts: 291
Default

Before I bought my 05, I test drove an 08. The 08 definitely had more "seat of the pants." However, my 05 has the 2.73 rear end gear, and I suspect the 08 had the performance gear. Therefore, I have nothing meaningful to contribute.
jmoffett is offline   Reply With Quote
Old 05-05-2011, 07:59 PM   #12
ceastham1
CF Senior Member
St. Jude Donor '10-'11-'12-'13-'14-'15
 
ceastham1's Avatar
 
Member Since: May 2007
Location: greenville sc
Posts: 472
Default

ls3
ceastham1 is offline   Reply With Quote
Old 05-05-2011, 08:01 PM   #13
Cybernetic Medic
CF Senior Member
 
Cybernetic Medic's Avatar
 
Member Since: Jan 2010
Location: Schererville Indiana
Posts: 1,252
Default

Ok here's an opinion that won't find a big following here...

IMHO, anything over 300hp is more than enough to have some reasonably spirited fun driving on public roads. Having 400hp vs 436hp makes a difference on the strip or a road course but not that much difference for daily driving. How many people warn that turning off the nannies, ( which limit performance ), is irresponsible while driving on public roads, yet make the difference between the LS2 / LS3 seem like night and day?

An interesting comparison would be LS2(nannies off) vs LS3(nannies on)
Cybernetic Medic is offline   Reply With Quote
Old 05-05-2011, 10:59 PM   #14
Gearhead Jim
CF Senior Member
St. Jude Donor '13
Support Corvetteforum!
 
Gearhead Jim's Avatar
 
Member Since: Sep 2000
Location: Chicago area
Posts: 17,508
Default

Quote:
Originally Posted by Purdue View Post
I could tell a noticeable difference between my old 2006 LS2 compared to my current 2009 LS3. Extra HP and TQ along with better gearing 2.56 vs. 2.73 makes a difference.

BTW this thread is going to get interesting .
My experience exactly.
Gearhead Jim is offline   Reply With Quote
Old 05-05-2011, 11:42 PM   #15
cadguymark
CF Senior Member
 
cadguymark's Avatar
 
Member Since: Sep 2006
Location: Land of 10,000 taxes
Posts: 4,566
Default

Quote:
Originally Posted by theradioflyer View Post
I'm looking for a breakdown in the differences between the LS2 and LS3 motors. I haven't driven either extensively but I'm told by those who have that the LS3 drives like it has a LOT more power than the LS2....much more than the ~30hp advertised.
there is a simple explanation for that that is little known:

the SAE Horsepower scale is not linear, from 0 to 400 it is, but from 400 to 436 it is not, each HP from 400 to 436 is actually twice as large as those under 400 or over 436

at 437 the scale is once again linear on up to infinity

that is why the LS3 feels so much more awesome than it's meager 30 HP rating increase over the LS2 would suggest

Last edited by cadguymark; 05-05-2011 at 11:46 PM.
cadguymark is offline   Reply With Quote
Old 05-06-2011, 12:21 AM   #16
iridelow
CF Senior Member
 
iridelow's Avatar
 
Member Since: Feb 2006
Location: N. Myrtle Beach SC
Posts: 4,445
Default

30 HP is not enough difference to feel a "seat of the pants" difference outright! Gears will! On the track, there is only a couple 10ths of a difference so, it's not a big difference. Sure the LS3 is faster, giving everything else the same. But I bet you can put 87 octain gas in the LS3 and put 94 octain in the LS2 and the LS2 might even feel faster from 0-60. Yes 30 HP can be felt, but not "wow" factor. Now climb into the Z06 from either LS2 or LS3...then you will get the true "seat of the pants" difference! And yes, I have driven all three many times. As said before, the gears make more of a difference "feel wise", than 30 HP.
iridelow is offline   Reply With Quote
Old 05-06-2011, 08:35 AM   #17
Cool Rod
CF Senior Member
 
Member Since: Sep 2007
Location: Miami Florida
Posts: 682
Default

Quote:
Originally Posted by Mike Campbell View Post
I do agree ( and also wish I had one) the LS3's are an upgrade and a superior engine than the LS2. However, for ALL the extra horsepower and torque, I must ask, why aren't they faster???
No.

Checking the numbers for 1/4 mile, using the top 10 stock LS2 vs. the top 10 stock LS3 as recorded here in the list (scroll down)

http://forums.corvetteforum.com/c6-t...lenge-258.html

LS2
Fastest Speed 115.58
Fastest Time 12.412
Average Speed 114.26

LS3
Fastest Speed 122.05
Fastest Time 12.034
Average Speed 117.02.

Last edited by Cool Rod; 05-07-2011 at 02:40 PM. Reason: Can't count
Cool Rod is offline   Reply With Quote
Old 05-06-2011, 08:58 AM   #18
theradioflyer
Supporting Vendor
 
theradioflyer's Avatar
 
Member Since: Jul 2010
Location: Grass Lake Texas
Posts: 6,125
Default

LS3 Improvements listed here:

http://www.ls1tech.com/forums/new-ls...s2-vs-ls3.html

Post #3 mentions A variable valve timing setup. If this is true, I'm Defiantly interested.
theradioflyer is offline   Reply With Quote
Old 05-06-2011, 10:19 AM   #19
mneblett
CF Senior Member
Cruise-In VIII Veteran
 
mneblett's Avatar
 
Member Since: Jan 2006
Location: Fairfax VA
Posts: 1,086
Default

Quote:
Originally Posted by theradioflyer View Post
LS3 Improvements listed here:

http://www.ls1tech.com/forums/new-ls...s2-vs-ls3.html

Post #3 mentions A variable valve timing setup. If this is true, I'm Defiantly interested.
I didn't see a mention of VVT -- and in any case, the LS3 doesn't have it.
mneblett is offline   Reply With Quote
Old 05-06-2011, 10:23 AM   #20
BSSN
CF Senior Member
 
BSSN's Avatar
 
Member Since: Dec 2009
Location: Shreveport LA
Posts: 2,859
Send a message via AIM to BSSN Send a message via Yahoo to BSSN
Default

The LS3 is simply the next step up. Like the LS1 to the LS2.

The powerband is meatier, the engine is fundamentally "stronger", and it packs more punch.

Of course it uses more fuel. It makes more power and isn't radically different in efficiency.

What you are not listing is that the car is not just an engine. To get an LS3, you need to get an '08. When getting an '08, you get the TR6060 transmission, better steering feel, and a host of other "little things" that amount to much more than "30bhp".
BSSN is offline   Reply With Quote
Go Back   Corvette Forum > C6 Corvette, 2005 - 2013 > C6 Corvette General Discussion
Reload this Page LS2 vs LS3 differences?
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
ls3 waterpump not the same as ls6-ls1 pump dcmock C5 Tech 20 07-12-2014 11:46 PM
is there any difference between LS2, LS3 and LS7 fuel rails? turbotuner20v C6 Tech/Performance 1 03-11-2012 10:47 PM
Corvettes in NASA ST1 Question BuckeyeZ06 Autocrossing & Roadracing 105 02-18-2012 05:49 PM
difference between LS2 and LS3? mundo C5 General 3 12-17-2010 09:49 AM
Will LS1 Fuel Rails work with all of the FAST intakes including LSXr? C5R UZR C5 Tech 2 05-04-2009 05:03 PM


Tags
060, 2005, c6, corvette, difference, engine, gas, l92, limiter, ls1, ls2, ls3, milagr, speed, spring, valve


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

 
Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
Vendor Directory
 

All times are GMT -4. The time now is 08:00 AM.


Emails & Password Backup