NO BULLSEYE 
Engine Block Question
Thread Starter
Race Director
Joined: Apr 2006
Posts: 11,363
Likes: 1
From: Virginia Beach VA
St. Jude Donor '08-'09
Engine Block Question
Ok, I should have asked this with my manifold question, but....
I was told my my tuner that my 01 vert is one of the 01's that used the LS6 block and manifold in it. Is there any way I can tell by looking at it, or any visible identifying marks on the manifold or VIN number that could tell me for sure?
I was told my my tuner that my 01 vert is one of the 01's that used the LS6 block and manifold in it. Is there any way I can tell by looking at it, or any visible identifying marks on the manifold or VIN number that could tell me for sure?
Le Mans Master
Joined: Jun 2002
Posts: 8,352
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From: In the pit, trying to love someone.
Yes, look on the passenger side by the water pump and along the front edge of the passenger side cylinder head. On the top edge of the block there will be some bullseye marks about the size of a nickel if you have an LS1 block. If it is an LS6 block there will be no bullseye. All 01+ came with the LS6 manifold standard.
Le Mans Master
Joined: Sep 2004
Posts: 5,707
Likes: 4
From: Los Angeles
Yes, look on the passenger side by the water pump and along the front edge of the passenger side cylinder head. On the top edge of the block there will be some bullseye marks about the size of a nickel if you have an LS1 block. If it is an LS6 block there will be no bullseye. All 01+ came with the LS6 manifold standard.
Race Director
Joined: Mar 2007
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From: Marlton. Increasing performance one speeding ticket at a time! NJ
Net effect though, was that there is no power difference between blocks.
Thread Starter
Race Director
Joined: Apr 2006
Posts: 11,363
Likes: 1
From: Virginia Beach VA
St. Jude Donor '08-'09
Le Mans Master
Joined: Jun 2002
Posts: 8,352
Likes: 103
From: In the pit, trying to love someone.
Not all 01's got them, and power wise it doesn't matter either way. The LS6 has the cast in windows at the bottom of the cylinder for better bay to bay breathing, a revised valley for the PCV system, and that's basically it.
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Melting Slicks
Joined: Feb 2006
Posts: 2,172
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From: Des Moines Iowa
Go look up Idahoe Corvette, and then when you get to their website, go the section dealing with the LS1 / LS6, Ruthless pursuit of power.