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Old Oct 27, 2014 | 07:21 AM
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chrisl25lnf
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From: ilkeston / derby
Default td04 max boost

Hi all i have a gb270 with a td04 . Was the max boost a td04 will flow . In psi . Or bar
Cheers chris .
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Old Oct 27, 2014 | 08:39 AM
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From: newquay
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i believe its 1.3 bar
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Old Oct 27, 2014 | 09:12 AM
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From: Living the dream
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I think you can run up to 1.6 but you need an up-rated actuator for that, although it may start to run out of puff at around 1.4.

Last edited by ditchmyster; Oct 27, 2014 at 09:14 AM.
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Old Oct 27, 2014 | 09:52 AM
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As said above it will supply 1.4bar easily but does run out of steam at higher RPMs. Speaking from experience too.
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Old Oct 27, 2014 | 01:03 PM
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From: ilkeston / derby
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Ive got a forged actuator . And its worth me getting it mapped then . As the ppp map the gb270 s come with its pants me thinks . Its hitting 1 bar 14.4 .psi . ish and then tails off to 12 psi .
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Old Oct 27, 2014 | 03:29 PM
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Isn't the GB270 a 2.5L if so I would just opt for a vf48 from the 2.5L STI, may as well make the cost of a re-map worth while.

My TD04 runs at 1.1bar but is on a 2.0L, it's fine for what I want on the road.
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Old Oct 27, 2014 | 03:45 PM
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From: ilkeston / derby
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Im trying to keep the car original Ish lol but want it to drive a little better
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Old Oct 27, 2014 | 04:42 PM
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From: harlow
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Originally Posted by chrisl25lnf
Im trying to keep the car original Ish lol but want it to drive a little better
It won't drive better with more boost on that tiny little turbo.
Leave it alone and enjoy it for what it is.
That turbo is better suited to a 1.6 than a 2.0, let alone a 2.5!
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