LS1 blocks question
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
LS6 block is different and includes better bay to bay breathing, a stronger block design. Later LS1 and LS6 blocks have different liners that allow 0.010" over bore, earlier blocks do not.
Note that some LS1 engines use the LS6 block, I know mine does as I checked the casting number last time the heads were off.
Note that some LS1 engines use the LS6 block, I know mine does as I checked the casting number last time the heads were off.
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
LS6 block is different and includes better bay to bay breathing, a stronger block design. Later LS1 and LS6 blocks have different liners that allow 0.010" over bore, earlier blocks do not.
Note that some LS1 engines use the LS6 block, I know mine does as I checked the casting number last time the heads were off.
Note that some LS1 engines use the LS6 block, I know mine does as I checked the casting number last time the heads were off.
Thread Starter
Former Vendor
Joined: Nov 2005
Posts: 8,995
Likes: 2
From: Spring Texas
St. Jude Donor '08
LS6 block is different and includes better bay to bay breathing, a stronger block design. Later LS1 and LS6 blocks have different liners that allow 0.010" over bore, earlier blocks do not.
Note that some LS1 engines use the LS6 block, I know mine does as I checked the casting number last time the heads were off.
Note that some LS1 engines use the LS6 block, I know mine does as I checked the casting number last time the heads were off.
Melting Slicks
Joined: Feb 2003
Posts: 2,966
Likes: 22
From: Frederick Maryland
St. Jude Donor '08-'09-'10-'11
Since the LS series have a deep skirt block design, the 2 cylinders (4 chambers) share a "chamber" below the piston. This is where the crank spins the connecting rods. When the engine is running, the 4 chambers build pressure from pistons moving up and down. The LS6 blocks have a "window" between the chambers to equalize the pressure created by the piston movement.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
IIRC the LS6 blocks have better oiling galleys and stronger head studs over the original LS1 blocks,
all the blocks now are LS6 blocks, even though over on LS1tech, they still call the blocks LS1 blocks.
all the blocks now are LS6 blocks, even though over on LS1tech, they still call the blocks LS1 blocks.
