Lxx Questions?
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Lxx Questions?
Concidering stepping into the new milenium
Been shopping ebay, used engine/tranny packages out there from $1000 to $5000. What is the diff between LSx and LTx, 1, 2, 3....6?
Very confusing
TIA
Been shopping ebay, used engine/tranny packages out there from $1000 to $5000. What is the diff between LSx and LTx, 1, 2, 3....6?
Very confusing
TIA
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
I just jumped in and bought one Wednesday morning and am on my way to pick it up Saturday morning. I wound up getting an LS1 out of a 2002 SS Camaro with 22k miles on it. Basically the LS1 is the first version of the LS motor to come out in the C5 vette. The next version for corvettes was the LS6 in the Z06 vettes. Then in in 2005 the LS2 version came out in the corvette. The new LS7 is a dry sump 427 505HP version of the motor.
The LS1 LS6 are all 346 CI motors.
The LS2 I am not sure of its size but is 400HP.
There are lots more different engines than this, but this is mainly what I was after. Hopefully someone will chime in about and explain more about the differences.
The LS1 LS6 are all 346 CI motors.
The LS2 I am not sure of its size but is 400HP.
There are lots more different engines than this, but this is mainly what I was after. Hopefully someone will chime in about and explain more about the differences.
Melting Slicks
Joined: Nov 2002
Posts: 2,231
Likes: 7
From: Fort Pierce Florida
There's also the LT1 and LT5 which is an earlier EFI motor using basically the same 350 c.i. block found in most C3's. If you're going to get a newer engine, go with the LS's. Otherwise it just won't be worth the trouble IMO.
Race Director
Joined: Sep 1999
Posts: 11,360
Likes: 382
From: Plano TX
LT1: Gen II smallblock introduced in the C4 in 92. F-body in 93. 350 CUI. 300 hp in C4, 275-285 in F-body. There was also an iron head LT1 for B-bodies (Caprice, Road master, Fleetwood).
LT4: Better heads, cam. Rated 330 hp in '96 C4.
LT5: DOHC all-aluminum for the C4 ZR1. 385-405 hp (I think)
LS1: Gen III small block. 346 CUI. Introduced in the C5 in '97, f-body in '98. All aluminum. 345 hp in C5, 305 hp (underrated) in f-body.
LS6: Same as LS1 but better heads, cam, intake. I think ~400 hp. Came in C5 Z06.
LS2: Introduced in '05 for the C6. 400 hp, 6-liters. Evolution of the LS1.
LS7: Super duper version of the LS2. Dry-sump oiling, 500+ hp, etc. Comes in the C6 Z06.
LT4: Better heads, cam. Rated 330 hp in '96 C4.
LT5: DOHC all-aluminum for the C4 ZR1. 385-405 hp (I think)
LS1: Gen III small block. 346 CUI. Introduced in the C5 in '97, f-body in '98. All aluminum. 345 hp in C5, 305 hp (underrated) in f-body.
LS6: Same as LS1 but better heads, cam, intake. I think ~400 hp. Came in C5 Z06.
LS2: Introduced in '05 for the C6. 400 hp, 6-liters. Evolution of the LS1.
LS7: Super duper version of the LS2. Dry-sump oiling, 500+ hp, etc. Comes in the C6 Z06.
Le Mans Master
Joined: Aug 2000
Posts: 8,762
Likes: 2
From: Murphy TX
LT1: Gen II smallblock introduced in the C4 in 92. F-body in 93. 350 CUI. 300 hp in C4, 275-285 in F-body. There was also an iron head LT1 for B-bodies (Caprice, Road master, Fleetwood).
LT4: Better heads, cam. Rated 330 hp in '96 C4.
LT5: DOHC all-aluminum for the C4 ZR1. 385-405 hp (I think)
LS1: Gen III small block. 346 CUI. Introduced in the C5 in '97, f-body in '98. All aluminum. 345 hp in C5, 305 hp (underrated) in f-body.
LS6: Same as LS1 but better heads, cam, intake. I think ~400 hp. Came in C5 Z06.
LS2: Introduced in '05 for the C6. 400 hp, 6-liters. Evolution of the LS1.
LS7: Super duper version of the LS2. Dry-sump oiling, 500+ hp, etc. Comes in the C6 Z06.
LT4: Better heads, cam. Rated 330 hp in '96 C4.
LT5: DOHC all-aluminum for the C4 ZR1. 385-405 hp (I think)
LS1: Gen III small block. 346 CUI. Introduced in the C5 in '97, f-body in '98. All aluminum. 345 hp in C5, 305 hp (underrated) in f-body.
LS6: Same as LS1 but better heads, cam, intake. I think ~400 hp. Came in C5 Z06.
LS2: Introduced in '05 for the C6. 400 hp, 6-liters. Evolution of the LS1.
LS7: Super duper version of the LS2. Dry-sump oiling, 500+ hp, etc. Comes in the C6 Z06.
LS1 was 345hp/350tq previous to 2001, then went to 350/375 in 2001 on. 5.7L. So a later LS1 is torquier
LS6 was 385 in 2001, then went to 405/400 in 2002. 5.7L, different heads and block (port shapes changed), different cam, different pistons, increased compression
From 2002 (I believe) on, LS1 and LS6 shared same intake manifold, all other differences stayed different.
Safety Car
Joined: Aug 2001
Posts: 4,883
Likes: 11
From: North Easton Mass
Zwede has most of it. I'm a C5 guy lurking and considering a C3...
LS1 was 345hp/350tq previous to 2001, then went to 350/375 in 2001 on. 5.7L. So a later LS1 is torquier
LS6 was 385 in 2001, then went to 405/400 in 2002. 5.7L, different heads and block (port shapes changed), different cam, different pistons, increased compression
From 2002 (I believe) on, LS1 and LS6 shared same intake manifold, all other differences stayed different.
LS1 was 345hp/350tq previous to 2001, then went to 350/375 in 2001 on. 5.7L. So a later LS1 is torquier
LS6 was 385 in 2001, then went to 405/400 in 2002. 5.7L, different heads and block (port shapes changed), different cam, different pistons, increased compression
From 2002 (I believe) on, LS1 and LS6 shared same intake manifold, all other differences stayed different.
Rick B.
Rick B.
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Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Bring it to the table....
Other than a 100 lbs? weight savings, which really is not all that much, just perzactly what does a LSx series engine bring to the table for ME, a hotrodder after max bux/effectiveness.....I am intriegued by maybe another 50 hp,and more torque....my late roller SBC with aluminum heads L98 type olde stuff should make about 375-400 hp, so I am told....well lets say it's 360 hp on a good day....cold weather, and so forth...not available in Florida, I know...so humor me....
with that power level what are the capabilities in Fuel Economy and so forth for similar power levels...do the LS do??
with that power level what are the capabilities in Fuel Economy and so forth for similar power levels...do the LS do??
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Gene,The ls power pulls alot different then the lt or tpi motors,on a good day a tpi can pull 5500 the ls motors surpassed that with no problem at all.The way they feel while cruising and hammer it down pulls way different then the tpi motor.Theres power in every gear,even in overdrive just cruising at 55 nail it and it just goes,.There just better.
Last edited by PatsLs1vette; May 8, 2007 at 07:18 PM.
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
I cannot wait to install mine. I have all the accessories torn off of it right now for clean up. I am thinking I may step up on the cam a little and possibly heads too. I drove my buddies 02 Z06 and it was nothing like what the current motor is in my vette. One thing I do know is the firing order has changed on the LS1. Just when I thought I had the Chevy firing order almost memorized......
Instructor
Joined: May 2006
Posts: 242
Likes: 0
From: Riverside CA
Gene,The ls power pulls alot different then the lt or tpi motors,on a good day a tpi can pull 5500 the ls motors surpassed that with no problem at all.The way they feel while cruising and hammer it down pulls way different then the tpi motor.Theres power in every gear,even in overdrive just cruising at 55 nail it and it just goes,.There just better.
I got a nice running 72 454 and love it but the new technology in the 01 - well, no contest. And these engines have a ton of potential for huge increases in power for relatively cheap.
LS1 = 5.7L 346 CI
LS6 = 5.7L 346 CI increased HP for Z06
LS2 = 6.0L 364 CI for 2005
LS7 = 7.0L 427 CI for 2005 Z06
There is also the LS-6 and LS-7 (with hyphen) which are the old 454's from the early 70's like mine.
Wonder how a LS7 would fit in a C3?
Le Mans Master
Joined: Aug 2000
Posts: 8,762
Likes: 2
From: Murphy TX
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
I cannot wait to install mine. I have all the accessories torn off of it right now for clean up. I am thinking I may step up on the cam a little and possibly heads too. I drove my buddies 02 Z06 and it was nothing like what the current motor is in my vette. One thing I do know is the firing order has changed on the LS1. Just when I thought I had the Chevy firing order almost memorized......
alternate the 4 corners, then alternate the 4 centers....
wonder how many of you think the engine allways fires #1 cyl upon startup???
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Here you go
IGNITION SYSTEM
Each coil is located near the spark plug for high ignition energy, which results in more efficient combustion and better performance.
The electronic spark timing signals for the coils originate from the crankshaft and camshaft position sensors enabling high-accuracy spark delivery and misfire detection.
The firing order of the LS1’s ignition is also new. The new sequence is 1-8-7-2-6-5-4-3, whereas past small blocks had a 1-8-4-3-6-5-7-2 firing order. This was done for better idle stability and reduced vibration.
IGNITION SYSTEM
Each coil is located near the spark plug for high ignition energy, which results in more efficient combustion and better performance.
The electronic spark timing signals for the coils originate from the crankshaft and camshaft position sensors enabling high-accuracy spark delivery and misfire detection.
The firing order of the LS1’s ignition is also new. The new sequence is 1-8-7-2-6-5-4-3, whereas past small blocks had a 1-8-4-3-6-5-7-2 firing order. This was done for better idle stability and reduced vibration.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Here you go
IGNITION SYSTEM
Each coil is located near the spark plug for high ignition energy, which results in more efficient combustion and better performance.
The electronic spark timing signals for the coils originate from the crankshaft and camshaft position sensors enabling high-accuracy spark delivery and misfire detection.
The firing order of the LS1’s ignition is also new. The new sequence is 1-8-7-2-6-5-4-3, whereas past small blocks had a 1-8-4-3-6-5-7-2 firing order. This was done for better idle stability and reduced vibration.
IGNITION SYSTEM
Each coil is located near the spark plug for high ignition energy, which results in more efficient combustion and better performance.
The electronic spark timing signals for the coils originate from the crankshaft and camshaft position sensors enabling high-accuracy spark delivery and misfire detection.
The firing order of the LS1’s ignition is also new. The new sequence is 1-8-7-2-6-5-4-3, whereas past small blocks had a 1-8-4-3-6-5-7-2 firing order. This was done for better idle stability and reduced vibration.
I hear you Pat, that 4-7 switch in firing keeps the 5-7 adjacent cyl firing more evened out....and of course the separate exhaust passages spread out over the head is better also...no super hot spots....
but on that firing order thing.....expressed differantly....72184365, or 4 corners....7218, then 4 centers 4365.....
the LS does the same thing just slightly differantly from what you said above.....4 corners, 4 middles....
BTW, some 15 years ago when putting DPFI on my 455 Poncho engine alone in my garage...with help from a tig welder friend.....I figgered out the true firing order.....4 corners, 4 centers...it was a batch fire engine, and it changed my thinking a bit....
