LS1 Block vs. LS6 Block
Thread Starter
Le Mans Master
Joined: Aug 2002
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From: Norfolk VA
LS1 Block vs. LS6 Block
I know that mid 01+ C5s all used the LS6 block for LS1s, but what exactly is the difference between the two blocks. Is one stronger? What did they change when the designed the LS6 Block
Drifting
Joined: Apr 2004
Posts: 1,530
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From: CT
The only change to the block was the addition of cast in bulkhead windows vs machined windows to release crankcase pressure between cylinder bays freeing up some hp at high revs.
The breathing problem was discovered during the development of the LS1 but it was too late to change the molds, so 28.5 mm vent holes were machined in the windows for the LS1.
The above is from "How to Build High Performance Chevy LS1/LS6 V-8s" by Will Handzel. Handzel is Program Manager GM Performance Parts.
The breathing problem was discovered during the development of the LS1 but it was too late to change the molds, so 28.5 mm vent holes were machined in the windows for the LS1.
The above is from "How to Build High Performance Chevy LS1/LS6 V-8s" by Will Handzel. Handzel is Program Manager GM Performance Parts.
