Heads: 317s vs 243s
11-06-2009, 10:32 PM
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Heads: 317s vs 243s My plan is to use 243 (LS6) heads on a turbo motor but have seen others and some one I know say the LQ4 (317) is just as good or better for boosted LS engine.
Any input to this?
Any input to this?
11-06-2009, 10:39 PM
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317s have a larger combustion chamber at 72cc for lower compression, 243s have like I think 66cc so most go with the 317 to help aid compression. Nothing wrong with a 243 if your pistons are matched accordingly
11-07-2009, 12:34 AM
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i dont think there is a big difference. i think the ls6 heads out flow the 317s by a very small amount up top. when using a compression calculator i came up wiht 9.6:1 on a stock bottom end ls1.
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11-08-2009, 11:06 AM
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I am planning on beefing up the bottom end some though not go crazy as I will like to have it survive some abuse for a couple of seasons.
317s seem to be less expensive also.
317s seem to be less expensive also.
