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Forced Induction Superchargers | Turbochargers | Intercoolers

please help cant hold boost

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Old Jun 9, 2009 | 08:09 PM
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Default please help cant hold boost
i am running a twin turbo set up and makeing around 400 hp but when i get to about 12 pounds boost it falls out completely.
can anyone help me out why this is happening.. tuning with EFI LIVE
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Old Jun 9, 2009 | 08:20 PM
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Originally Posted by avalanchett
i am running a twin turbo set up and makeing around 400 hp but when i get to about 12 pounds boost it falls out completely.
can anyone help me out why this is happening.. tuning with EFI LIVE


What RPM?
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Old Jun 9, 2009 | 08:21 PM
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How are you arriving at the "about 400 hp" figure?
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Old Jun 9, 2009 | 08:22 PM
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twins, 12lbs, and 400hp; what size turbos?
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Old Jun 9, 2009 | 09:27 PM
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small turbos 57 trim t3 t4 ... on the dyno 400 to wheels.. it cant hold the boost will fall all the way out around 4000-4200 rpms. thanks for any help
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Old Jun 9, 2009 | 09:30 PM
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its on a stock 5.3 07 chev. truck.. i want to get close to 450 - 500 with it holding boost around 10 psi. any advice what could be happening
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Old Jun 10, 2009 | 05:49 AM
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Is this a new setup? or a new problem? What happens when it falls out of boost? Dyno graph? Give us as much information as possible.
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Old Jun 10, 2009 | 06:42 AM
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Its not in the tuning, it is something mechanical, waste gate, BOV, or programming via a boost controller..
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