View Poll Results: LS2 or LS6?
LS2
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50.00%
LS6
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50.00%
Voters: 52. You may not vote on this poll
LS2 vs. LS6
Thread Starter
Lepus-temperamentalus
Joined: Apr 2004
Posts: 5,827
Likes: 5
From: Roswell Ga
LS2 vs. LS6
If you were going to replace your LS1 engine with a crate motor and the only choices were a 400 hp LS2 or a 400 hp LS6, which would you choose and why?
Last edited by JACKAL0PE; Mar 22, 2010 at 07:21 PM.
Racer
Joined: Oct 2000
Posts: 483
Likes: 3
From: Woodstock Ga
Would it be for a Z06? I'd probably want to keep a LS6 in a Z just since it is the correct engine. Otherwise, the LS2 would be my choice since with it's larger bore it can accept L92 heads down the road and a little extra displacement never hurt anybody, etc. Stock for stock I believe the LS6 technically makes 5 more hp and is a little higher strung, LS2 probably has a better overall power curve as a result, not sure. Is the price equal between the two?
I didn't vote since it depends on the situation...
I didn't vote since it depends on the situation...
Last edited by GM Fan; Mar 22, 2010 at 07:22 PM.
Racer
Joined: Oct 2000
Posts: 483
Likes: 3
From: Woodstock Ga
Melting Slicks
Joined: Feb 2009
Posts: 3,438
Likes: 30
From: Fairfax Virginia
I've previously had a C5Z for 4 years and I've had two C6s with LS2s. There is no comparison between them when it comes to responsiveness. The LS6 is much more responsive IMO. The LS3 matches the LS5, but the LS2 does not. Put it into a C5, there is no question that I would want the LS6.
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Drifting
Joined: Oct 2003
Posts: 1,932
Likes: 4
From: Warrenville Il
Need more info. Is this a block to block comparo. If so I would want the extra displacement of the LS2. If were talking fully assembled, being removed from a donor car, then I don't think I would want all of the added pains of having to get electronics and pcm's to communicate with all of the differences between the LS1 and it's electronics and an LS2's. I would think in that case the LS6 would be much more of an easier swap. Iv'e never done this myself so it's just an opinion, based on what I know of the differences between the 2 generations
Thread Starter
Lepus-temperamentalus
Joined: Apr 2004
Posts: 5,827
Likes: 5
From: Roswell Ga
Well, actually it's more of a hypothetical question rather than a practical one. All I'm asking here is which of the two you'd replace a standard LS1 with if you were going to put in a replacement engine.
Yes the LS2 has more displacement, but I've heard before that the LS6 is a more responsive and actually more powerful engine. I've never see any figures to support that though.
So I'm curious, is 400 hp always 400 hp?
Yes the LS2 has more displacement, but I've heard before that the LS6 is a more responsive and actually more powerful engine. I've never see any figures to support that though.
So I'm curious, is 400 hp always 400 hp?
Race Director
Joined: May 2001
Posts: 15,323
Likes: 2,077
From: Guelph, Ontario
From what I understand, the LS2 is basically a 6.0L version of the 2001 LS6. In other words, the cam and heads are pretty much the same as the 2001 LS6 but with more displacement. So the LS2's throttle response should feel very similar to an LS6.
Team Owner
Joined: Nov 2001
Posts: 34,124
Likes: 105
From: Pensacola FL
I have a LS6 in my Z16, but in your situation I would opt for the LS2. Bigger bore allows better valve unshrouding (is that a word?) and ultimately better flowing heads. The added cubes make for more power "under the curve" regardless of peak numbers.
Safety Car
Joined: Jan 2006
Posts: 4,122
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From: North Texas
I thought your heads were better due to the lighter valves, retianers, and springs?
Safety Car
Joined: Jan 2006
Posts: 4,122
Likes: 39
From: North Texas
Life Time NCM #2196
Joined: Sep 2004
Posts: 82,572
Likes: 1,683
From: Converse TX
got one in the C6 and love the stock power and it is a great platform for boost. Now if you are going strokers I am thinking about an LS2 ERL 427 for lots of cubes and 20# of boost
Banned Scam/Spammer
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From: Machineguns, because I don’t compromise
The LS6 is much more responsive because of the better intake manifold.
The LS2 is more sluggish... (I've driven countless of both)
That being said I chose LS6, although the LS2 has the benefit of better aftermarket cylinder heads with bigger valves due to it's 4.0 bore.
So.... it depends, are you planning to add heads later, or drop it in and enjoy? If it's the latter then for sure the LS6 is the better engine.
The LS2 is more sluggish... (I've driven countless of both)
That being said I chose LS6, although the LS2 has the benefit of better aftermarket cylinder heads with bigger valves due to it's 4.0 bore.
So.... it depends, are you planning to add heads later, or drop it in and enjoy? If it's the latter then for sure the LS6 is the better engine.
