This may be a dumbass questionbut..........
TECH Senior Member
Joined: Jun 2003
Posts: 9,339
Likes: 3
From: NYC metro area
No question is a dumb one here 
Since I'm up late, I guess I'll handle it to the best of my abilities...
The LT1, as you might know since you haven't listed it, is our motor, and I'm assuming yours, too, since you posted in this section.
THe LS1 is a totally different motor, with many different attributes. It displaces 346 cubic inches instead of 350, like the LT1. It's an aluminum block, which is much lighter than an iron block, but can't handle as much power. It uses 8 seperate ignition coils, one for each cylinder, while the LT1 only uses the one. They use a lid/filter intake, etc etc... you'll learn quickly on this board.
The LT4 is pretty much the same motor as an LT1, but with a few differences, power-wise. The most noticible is the infamous LT4 intake manifold which is powdercoated bright red. Others are a rougher cam, better heads, a slightly higher compression ratio, etc etc...
The LT5 is based on an LT1 block and displacement, but a totally different setup. Instead of a 2V pushrod setup, it uses a DOHC 4V, which is much more topend friendly. These motors were limited in ZR-1 Corvettes in the early 90s, and the top speed of those cars was right around 200mph. They were a GREAT topend motor, but very expensive. That's why you don't see many of them.
Hope this helped! I'm off to bed. G'nite!!
Since I'm up late, I guess I'll handle it to the best of my abilities...
The LT1, as you might know since you haven't listed it, is our motor, and I'm assuming yours, too, since you posted in this section.
THe LS1 is a totally different motor, with many different attributes. It displaces 346 cubic inches instead of 350, like the LT1. It's an aluminum block, which is much lighter than an iron block, but can't handle as much power. It uses 8 seperate ignition coils, one for each cylinder, while the LT1 only uses the one. They use a lid/filter intake, etc etc... you'll learn quickly on this board.
The LT4 is pretty much the same motor as an LT1, but with a few differences, power-wise. The most noticible is the infamous LT4 intake manifold which is powdercoated bright red. Others are a rougher cam, better heads, a slightly higher compression ratio, etc etc...
The LT5 is based on an LT1 block and displacement, but a totally different setup. Instead of a 2V pushrod setup, it uses a DOHC 4V, which is much more topend friendly. These motors were limited in ZR-1 Corvettes in the early 90s, and the top speed of those cars was right around 200mph. They were a GREAT topend motor, but very expensive. That's why you don't see many of them.
Hope this helped! I'm off to bed. G'nite!!
Also the lt1 has standard d-port exhaust ports while the ls1 has the same port has a bigblock chevy which is oval...The ls1 should be called a medium block considering it has alot of small block and big block attributes. alsosince the ls1 is aluminum to make it stronger there are six points of connection on the main cap as opposed to 4 or 2.
Launching!
Joined: Jan 2002
Posts: 201
Likes: 0
From: Friendswood, Tx
the LS1 uses a 15 degree head, while the LT1 uses a 23 degree head. And the LS1 heads out flow the LT1 heads by alot.
The LS1 comes in the 97-04 vette, and the 98-02 F-body
The LT1 comes in the 92-96 vette, nad the 93-97 F-body, and an iron headed LT1 comes in the 94-96 Impala SS.
The LT5 was designed by GM and Lotus and built by mercury marine, or Mercruiser at the time. and the LT5 came in the 90-95 ZR1 corvette. HP rating was 375hp aand 370ft lbs of torque from 1990-1992 and 405hp and 385ft lbs of torque from 1993-1995.
The LS1 comes in the 97-04 vette, and the 98-02 F-body
The LT1 comes in the 92-96 vette, nad the 93-97 F-body, and an iron headed LT1 comes in the 94-96 Impala SS.
The LT5 was designed by GM and Lotus and built by mercury marine, or Mercruiser at the time. and the LT5 came in the 90-95 ZR1 corvette. HP rating was 375hp aand 370ft lbs of torque from 1990-1992 and 405hp and 385ft lbs of torque from 1993-1995.
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Teching In
Joined: Dec 2003
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is it possible to fit an LT4 in a 02 WS-6?? IF possible is there a site that I can go to, to find pricing info and such other info of that sort?? ant help whould be great. O and one more thing would it just be beter to keep the LS1 or get the LT4 engine swap??
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Verdad Gallardo TECH Senior Member
Joined: Jun 2003
Posts: 9,339
Likes: 3
From: NYC metro area
Originally Posted by WS-6Guy07
is it possible to fit an LT4 in a 02 WS-6?? IF possible is there a site that I can go to, to find pricing info and such other info of that sort?? ant help whould be great. O and one more thing would it just be beter to keep the LS1 or get the LT4 engine swap??
I dunno about potential though honestly....the fastest cars are still LT1s and there are so many aftermarket head castings that can come close to a ported ls1. This isnt by any means to start some sort of argument i'm just stating an opinion. I have had both engines but i choose to spend less money o go fast so I have a lt1 if I was wealthier though I would have both. I love my lt1 and I love the fact that I spent 1200 bucks to do heads/cam(ported heads myself) but once the parts come down for ls1s I may have to pick one up 
Staging Lane
Joined: Mar 2003
Posts: 70
Likes: 0
From: Cordova, TN
Originally Posted by WS-6Guy07
is it possible to fit an LT4 in a 02 WS-6?? IF possible is there a site that I can go to, to find pricing info and such other info of that sort?? ant help whould be great. O and one more thing would it just be beter to keep the LS1 or get the LT4 engine swap??
well right now the fastest 4th gen based off of a stock style motor is an mid 8 sec C5R blown LS1 TA convertible, watched that car run out at thunder. Incredible car but cost over 200K to build, look at the pics and you'll see why. That and it was hand built by wheel to wheel. The LS1 has a lot of potential if you got a lot of money to spend. People look atbthese records ARE and that black TA set and think all LS1s are cpable of it. To get a car to run that well takes a lot of effort and money, no two ways about it. I wouldnt swap an LS1 for an LT4, thats just plain stupid. How ever if you already have an LT1 based vehicle, you can make it run. Half the people I see on the boards are morons, then you got the one or two guys that know what the hell their doing and you see their cars run for not having that much. Steve Quin, Frank95Z, Sar2K, Tim with that red 95 Formula 355, all perfect examples of it. Also take a look at Jason Warren cars, what I'm saying is, an LT1 may make less power stock but its still a small block Chevy. You can still make it run on a budget, plenty of people have. LS1s having 6 bolt mains is true, but the other two bolts are so small I cant see how they make a real difference. LS1s can be bored and stroked to insane CID #s, then throw on the fact they have awesome heads, you can see why they can make so much power. But thats dyno racing. LT1 still has a lot of potential and can still be made to run.