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  #1  
Old 04-09-2012, 10:38 PM
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Default boost solenoid??
hi peeps! im upgrading my turbo in a couple of weeks on my wrx to a vf34 and hoping to get around 330 bhp with my supporting mods and was wondering if it would be a good idea to get a 3 port boost solenoid or is it not so important at least bhp

thanks sam
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Old 05-09-2012, 06:06 AM
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Probably worth getting to improve boost control - the 2 port might be fine, mine wasn't as it couldn't control the boost so I had to upgrade be a pain to get it mapped but not reach the full potential for the sake of a relatively cheap part.
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Old 05-09-2012, 08:35 AM
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a 2port will easily support 350+ BUT they need to have the correctly sized "pill" to enable the range to work......
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Old 05-09-2012, 08:57 PM
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Originally Posted by asperformance View Post
a 2port will easily support 350+ BUT they need to have the correctly sized "pill" to enable the range to work......
totally agree. all that technology and those bloody brass pills can make a world of difference. sometimes its old school tinkering that's required
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Old 06-09-2012, 06:42 AM
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Guess I was conned by PowerStation then! Although I guess a 2 port would be struggling now!
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Old 06-09-2012, 08:45 AM
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not sure what you were told so "conned" is maybe a strong word........it can take a bit of messing to find the correct size for the restrictor to enable the control to work in the correct range so often people cant be bothered..........

we have a 2.5 running a 20g with all supporting mods that still runs a 2port and boost comes in very early and holds all the way through the range.......think from memory it took about 2-3hrs to find the correct restrictor (was built 10yrs ago) and at the time 3ports weren't as easily/cheaply available
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Old 06-09-2012, 07:24 PM
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Fair point the prodrive was only £60 quid and fitted in 5 mins so cheaper than the faffing about!
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Old 06-09-2012, 08:23 PM
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Fair point the prodrive was only £60 quid and fitted in 5 mins so cheaper than the faffing about!
Prodrive on the Bug usually had a slightly smaller restrictor to achieve the desired boost.
Without it the bug's struggle to hit much above 1bar regardless of what you tell the ECU to do, hence why I used to have a tray of the smaller restrictors.
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Old 06-09-2012, 08:45 PM
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Originally Posted by SilverSurfer View Post
Prodrive on the Bug usually had a slightly smaller restrictor to achieve the desired boost.
Without it the bug's struggle to hit much above 1bar regardless of what you tell the ECU to do, hence why I used to have a tray of the smaller restrictors.
Poking my nose in my jdm bug recorded a 1.4bar boost think that is on the standard 2 port?
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Old 06-09-2012, 08:52 PM
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Poking my nose in my jdm bug recorded a 1.4bar boost think that is on the standard 2 port?
It would need a smaller restrictor pill or a very tight actuator on the standard TD04 to achieve that. A different/larger turbo would be different though. The pill size primarily effect the spool and spike, but can effect the held boost on a breathless turbo.
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Old 06-09-2012, 09:00 PM
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Originally Posted by SilverSurfer View Post
It would need a smaller restrictor pill or a very tight actuator on the standard TD04 to achieve that. A different/larger turbo would be different though. The pill size primarily effect the spool and spike, but can effect the held boost on a breathless turbo.
Think turbo is a vf30?
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