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Old Jun 10, 2009 | 10:46 PM
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Which of the two flow better

ls2 243s or lq9 317s?
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Old Jun 10, 2009 | 10:56 PM
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curious as i have both heads and want to keep the better of the two.

Last edited by maxgee; Jun 10, 2009 at 11:05 PM.
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Old Jun 12, 2009 | 10:49 AM
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ls2 has better stock flow numbers.. if there ported im not sure?
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Old Jun 12, 2009 | 02:10 PM
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intake port/valve is identical for both
243 have smaller chamber 65cc
317 71cc
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Old Jun 19, 2009 | 03:37 PM
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They are identical ports just a different size chamber as stated.

The bigger chamber 317's will work best for F/I while an N/A or NO2 motor will benefit from the added compression of the smaller chamber 243's.
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Old Aug 24, 2009 | 09:36 PM
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went with the ls2/243s pushed boost thru them in 4th gear today, pulled nicely
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