3 port boost control solenoid

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3 port boost control solenoid

Postby ndlibgt » Wed Jul 20, 2011 7:54 am

Hi guys,
Does anyone have an opinion on the OEM item? Does it need to be upgraded when flash tuning? Bearing in mind I'm hoping to keep boost at near to stock levels, (dependent on what my tuner recommends and feedback from forum members)
Cheers
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Re: 3 port boost control solenoid

Postby coyote » Wed Jul 20, 2011 10:21 am

With the stock turbo, your 2 port solenoid is fine. In fact, most tuners will get a worse result with the 3 port.
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Re: 3 port boost control solenoid

Postby tangcla » Wed Jul 20, 2011 10:44 am

I've been told by my tuner not to bother with the 3-port solenoid.
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Re: 3 port boost control solenoid

Postby Robbks » Wed Jul 20, 2011 11:09 am

coyote wrote:In fact, most tuners will get a worse result with the 3 port.


heard this mentioned a few times,
do they ever gives any reasons.

i had a 3-port when using my PowerFC on my GT fozz and also connected to both the Haltech interceptor and Greddy Profec E-01 boostc ontroller on my legacy and had perfect boost control in all 3 situations.
Not to mention it makes the vacuum line plumbing a little simpler without the need for tee pieces, restrictor pills and such.
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Re: 3 port boost control solenoid

Postby coyote » Wed Jul 20, 2011 11:37 am

Robbks wrote:
coyote wrote:In fact, most tuners will get a worse result with the 3 port.


heard this mentioned a few times,
do they ever gives any reasons.

i had a 3-port when using my PowerFC on my GT fozz and also connected to both the Haltech interceptor and Greddy Profec E-01 boostc ontroller on my legacy and had perfect boost control in all 3 situations.
Not to mention it makes the vacuum line plumbing a little simpler without the need for tee pieces, restrictor pills and such.


Did you mean to say reasons, or excuses?

The way late model Subaru ecus control boost is more complex than simply entering a boost target and a few duty cycles. I have a 3 port on my car and you can get a great result ... but even if you do have a really good handle on how the system works, you're just not going to get it right in 5 minutes.

If you are going to use the factory ecu to control boost (and there are lots of reasons why this is a good idea), unless your tuner has a proven ability to get rock steady boost in all gears using a 3 port and happily agrees to tune your 3 port to this level when quoting a price, just leave the standard stuff in there.

Or, start reading and do it yourself. It's not that hard, just time consuming.
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Re: 3 port boost control solenoid

Postby ndlibgt » Wed Jul 20, 2011 1:19 pm

Thx 4 da info guys, I'll probably save my pennies and stick with the OEM. Spend my money elsewhere when the time comes.
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Re: 3 port boost control solenoid

Postby XT_for_me » Wed Jul 20, 2011 8:52 pm

I am running an upgraded turbo and 18 psi with the standard control system. No problems, easy enough to tune, I can't see any reason to get a 3 port.
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