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Maximum safe boost pressure for a 6.9

5900 Views 3 Replies 3 Participants Last post by  Spencnaz
What is the max safe boost pressure for a 6.9? I have a Hypermax nonwastegate on mine.

A friend of mine cracked a 6.9 in two when he was running 15psi.

I know that a 6.9 really wasnt meant for boost, but I would like to know what kind of boost limit I should be watching out for when I slap a boost gauge on this mill.
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12 seems to be the suggested maximum. I don't know about cracking them in half. I'd think your headgaskets would let go before that happens.
1 - 1 of 4 Posts
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