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how do i lower boost?

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Old 09 September 2008 | 08:53 PM
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From: march, cambs
Default how do i lower boost?

can anyone tell me what way to screw the boost control valve to lower boost, cheers.
Old 09 September 2008 | 09:25 PM
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would need to add a manual boost controler into the pipe work unless u got it remapped and reduced it that way???

why you wanting to lower it?
Old 09 September 2008 | 09:27 PM
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From: march, cambs
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its got a manual boost controller on it, iv been trying to make sense of it all day, no one seems to know which why to turn it to lower it, iv only had the car 2 weeks, my first scooby, never had a turbo before, i want to lower it coz io think its overboosting, its running at 1.3 bar and cutting out.
Old 09 September 2008 | 09:30 PM
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From: Over 500ft/lbs of torque @ just 1.1bar
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The more you 'open' it up, the more boost it will allow. You will therefore need to 'tighten' it.
Old 09 September 2008 | 09:37 PM
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i see u have 2 threads and my old boost controller worked opposite from what bob is saying.

best bet is to remove the thing altogether.

it will put the boost back to oe setting unless its been remapped for raised/lower boost.

when u say its cutting out do you mean when accelerating hard it feels like ur slamming on the brakes hard?
Old 09 September 2008 | 09:41 PM
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From: Over 500ft/lbs of torque @ just 1.1bar
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It's nothing that can't be resolved by trial and error within a few minutes.

You have a 50/50 chance of getting it right the first time. If you get it wrong just do the opposite!
Old 09 September 2008 | 09:43 PM
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From: march, cambs
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it has been remapped to higher boost, no its not like braking, its like a misfire, between 4000 and 5000rpm in all gears, like a flat spot, had a fault diagnosis say it had misfired on all 4 cylinders at some point, maybe due to being jump started on flat battery and losing ecu memory, but still feels like misfire
Old 09 September 2008 | 09:44 PM
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as bob says when i fitted mine i was adjusting it but just couldn't get it to work right (was overboosting BIG time) car kept hitting fuel cut and my engine was smoking lol but overall engine lasted 6 months after that before i seen any damage which i doubt was down to the over boosting lol ;-)
Old 09 September 2008 | 09:57 PM
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From: march, cambs
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ok, cheers everyone, il try fidling with it 2moro
Old 09 September 2008 | 10:03 PM
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doesn't sound like fuel cut then.

sounds like air flow meter, spark plug related or along that lines
Old 09 September 2008 | 10:21 PM
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From: march, cambs
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thats what i thought, but i took it to a scooby dealer today for diagnosis, didnt come up with anything! just said the original memory may be fighting against the remap it had
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