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Thread: BRAND NEW 317 heads for sale

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  1. 01-11-2010 08:25 PM #1
    tech946
    tech946 is offline Senior Member
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    what compression ratio would they yield on a 5.3?
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  2. 01-12-2010 03:19 AM #2
    ff_jeff Guest
    low. Im thinking like 8.5-8.8 CR. Good for a turbo. But would be a gutless pig for NA.
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  3. 01-12-2010 04:46 AM #3
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    flynn78us
    flynn78us is offline Starting the Power Search
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    Quote Originally Posted by ff_jeff View Post
    low. Im thinking like 8.5-8.8 CR. Good for a turbo. But would be a gutless pig for NA.
    Yeah thats what I thought, thanks for the info.
    Mike
    07 Avalanche LT1 w/5.3 We call her Ava
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  4. 01-12-2010 07:52 AM #4
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    00shortbox
    00shortbox is offline GM Tech
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    Quote Originally Posted by ff_jeff View Post
    low. Im thinking like 8.5-8.8 CR. Good for a turbo. But would be a gutless pig for NA.
    Yup, was gonna put them on my LS6 but didn't want to sacrifice the HP loss. Looking for some 243's.
    2000 Chevy Silverado RCSB LS6 5 speed, LS6 short block, 317 heads, LS6 intake, Lunati 220/224 .575/.575 112LSA cam, Edelbrock Headers, CTS-V accessory drive, Nelson Performance Custom Tune.
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