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Which head gasket for boosted 408

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Old 08-26-2015, 10:06 AM
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Default Which head gasket for boosted 408

Just curious if everyone is still using the ls9 head gasket or is there something new?
Old 08-26-2015, 10:14 AM
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thats what i used @15psi
Old 08-26-2015, 11:51 AM
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Lots of guys use the LS9 gaskets. My builder went with Fel-Pro 1162 gaskets.
Old 08-26-2015, 12:43 PM
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LS9's here too, no problems.
Old 08-27-2015, 12:36 AM
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Cometics, can't say that I have been real fair to them though.
Old 08-27-2015, 01:23 AM
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We are using Cometics on the 408 I'm tuning.
Running 19 psi
No studs, just ARP bolts.
So far so good!!

Fingers crossed....

Ron
Old 08-27-2015, 08:28 PM
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Have made consistent 800rw w ls9. Sbe w konichiwa head studs.
Looking to break 1200rw w the new setup. And arp head studs.
But my exp. They have held up at that lvl and no sealing issues or pushing water assclownery. To date. Fingers crossed. Prolly just jinxed myself.
Old 08-27-2015, 08:29 PM
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New setup is tt tc78 408 9.0:1 w dart heads n ls6 intake
Old 08-28-2015, 02:08 AM
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Originally Posted by NemeSS
Have made consistent 800rw w ls9. Sbe w konichiwa head studs.
Looking to break 1200rw w the new setup. And arp head studs.
But my exp. They have held up at that lvl and no sealing issues or pushing water assclownery. To date. Fingers crossed. Prolly just jinxed myself.
No problem man. If you need any help getting the water to come out just hit me up with a pm and I'll guide you on needed timing map changes. lol

Old 08-28-2015, 05:56 AM
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LS9's here, normal ARP studs, run as high as 27psi on standing 1km runs, no problems.
Old 08-28-2015, 11:56 PM
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what are you torquing them to?
Old 08-29-2015, 03:29 AM
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I think I went to around 85lbft
Old 08-29-2015, 03:42 AM
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85ft/lb m11
30ft/lb m8
Seems fine. No issues yet. For me.



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