Forced Induction Superchargers | Turbochargers | Intercoolers

boost keeps falling!?!?!

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Old Sep 6, 2007 | 07:07 PM
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Default boost keeps falling!?!?!

hey guys my boost will hit 7 then it falls slowley the rest of the pull some times it falls a half pound, sometimes it falls to 5. what you think is going on.... this is just one of many problems im having with my sts kit
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Old Sep 6, 2007 | 07:47 PM
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do a boost leak test first.
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Old Sep 6, 2007 | 08:00 PM
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Is your waste gate reference coming from an manifold source? If not change that first.
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Old Sep 6, 2007 | 08:07 PM
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Zombie, that is an awesome point...you should definitely make sure it's referenced right!
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Old Sep 6, 2007 | 09:58 PM
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t.t.t
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Old Sep 7, 2007 | 03:12 PM
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what is your wastegate spring pressure...maybe you are getting alittle boost spike then it settles down....I have a 5psi spring in mine and it will go up to 6/7 then fall back down to 5....just a thought....
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Old Sep 16, 2007 | 09:27 PM
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t.t.t
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Old Sep 16, 2007 | 09:40 PM
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My will do the same thing... ITS ALL IN WHERE YOUR Boost reference point is!!!
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Old Sep 17, 2007 | 12:38 AM
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Originally Posted by red beast
what is your wastegate spring pressure...maybe you are getting alittle boost spike then it settles down....I have a 5psi spring in mine and it will go up to 6/7 then fall back down to 5....just a thought....
What can be done to help with this? On my .4 bar (5.8psi spring) it jumps to 7-8 briefly and then back to 6psi. I have a boost controller (manual) that I think will help once connected. Wastegate is ref off of manifold. Any other advice?

Last edited by JAvenger007; Sep 17, 2007 at 12:44 AM.
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Old Sep 17, 2007 | 11:01 PM
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From what I understand, only an electronic boost controller will help. It will control the boost better. But, I could be wrong on this one. I actually have my boost controller programmed to do this on purpose. My fuel pump doesn't have any problem with 6.5 psi at 4k, but it sure did at 6k rpms.
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