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Boost Creep Over 4000rpm

Equinox

By Equinox,
in Engines & Forced Induction

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Equinox Rising Star

Equinox

Posted
Posted (edited)

This is really getting on my nerves.

Tried both types of Turbotech controllers (with and without the drilled hole) both set at 12psi and lately when it's been really cold (eg. at night), whenever I go over 4000rpm the boost creeps slowly up towards a maximum of 14psi at redline. Everyone says how well these hold boost, and they have for me too all through summer, but lately as soon as the air temperature drops, it just creeps like mad.

Anyone have any idea how to stop this? I have an AMPerformance CES-style one piece front/dump pipe if it makes any difference.

I might have to bite the bullet and buy an EBC if this keeps up.

Edited by Equinox
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https://www.sau.com.au/forums/topic/168200-boost-creep-over-4000rpm/
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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted

if its freezing cold then the extra couple of PSI would be a bonus and wont hurt your turbo. its mainly when hammering the turbo on big boost when its hot is when we have seen ceramic wheels let go.

Rocket_Rosco Collaborator

Rocket_Rosco

Posted
Posted
This is really getting on my nerves.

Tried both types of Turbotech controllers (with and without the drilled hole) both set at 12psi and lately when it's been really cold (eg. at night), whenever I go over 4000rpm the boost creeps slowly up towards a maximum of 14psi at redline. Everyone says how well these hold boost, and they have for me too all through summer, but lately as soon as the air temperature drops, it just creeps like mad.

Anyone have any idea how to stop this? I have an AMPerformance CES-style one piece front/dump pipe if it makes any difference.

I might have to bite the bullet and buy an EBC if this keeps up.

Sounds like the problem could be a restrictive wastegate or dump pipe/exhaust or both. If you can't release the exhaust flow fast enough the boost will creep due to the increased pressure within the turbo. I had this problem and had to have the wastegate modified larger and problem solved. There is no boost controller ever made that can hold boost if the exhaust system can't release pressure fast enough.

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