Which head will yield more power....
They flow the same and have the same port size 210/75cc. The only diff is the combustion chamber volume. 64.45 for the 243 and 71.06 for the 317. The 317s are good for forced induction due to the lower compression.
If you plan on staying all motor go with the 243 ls6 head.
If you plan on staying all motor go with the 243 ls6 head.
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From: Orange Park/ Jacksonville, FL
They flow the same and have the same port size 210/75cc. The only diff is the combustion chamber volume. 64.45 for the 243 and 71.06 for the 317. The 317s are good for forced induction due to the lower compression.
If you plan on staying all motor go with the 243 ls6 head.
If you plan on staying all motor go with the 243 ls6 head.
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Staging Lane
Joined: Nov 2008
Posts: 96
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From: Belen, NM
All things being equal, the 243 heads will make more power under the curve due to the higher compression. If you are staying N/A go with the 243 heads, maybe even add a thinner head gasket to raise compression. If you have any plans for forced induction go with the 317 heads, it will help when you do add boost.
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