FORCED INDUCTION Turbos | Superchargers | Intercoolers | H2O/Meth Injection

how much will the 6.0 handle?

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Old 09-22-2007, 04:35 AM
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Originally Posted by TurboBerserker
keep the 60 if your hp goals are below 500 to the ground. Much more than that, you should plan on an 80 when the tranny goes.

Is the 6.0 an LQ9 or an LQ4? That will make a noticable difference in the 'how much boost' question.
So the LQ9 like I have in mine will handle more or less boost than the LQ4?

What's the max boost you think with stock internals?
Old 09-22-2007, 04:56 AM
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less is ideal because of the higher CR of the lq9.
Old 09-22-2007, 07:11 AM
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Originally Posted by 02denali24s
So the LQ9 like I have in mine will handle more or less boost than the LQ4?

What's the max boost you think with stock internals?

Depending on intercooler, meth and tune, 12-14 psi. The LQ9 is 10.1:1 CR vs 9.4:1 in the LQ4. The LQ9 will make more power, however, with at equal boost levels.


I ran 12 psi on my LQ9 but didn't have enough fuel system to support it, so backed down to 10.
Old 09-22-2007, 10:13 AM
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Like everyone has already said, the trans wount last unless you drive like a grandma, STS is right about the stock cam IMO I had very good luck with the stock LQ4 block. With a good tune, 12-14 psi, fueling to support, meth, and cool air, they can make into the 600rwhp range. How long they last depends on how you drive, how close to the edge you are, and luck. lol
Old 09-26-2007, 09:20 PM
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I have an 03 SS with a junkyard stock 6.0L except for the valve springs and we ran 16psi tonight. Ran 11.90 at 119
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