I asked the question of the tuner who did my Foz a while back. His answer was yes absolutely. Anyone with knowledge or experience care to chime in on the subject ?

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Funny looking German Subaru

Yes.

You don't need to necessarily alter the tune, but you need to alter the rom to make use of the 3-port.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]

yep that's what Martin told me in a nut shell

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Funny looking German Subaru

Absolutely! We had to rescale my boost settings on the dyno to get my MAC valve working.

Without a tune it will overboost and spike like crazy.

The MAC 3 port valves usually require about 30% less duty cycle to reach target boost compared to the stock 2 port. Also you might have to reduce your turbo dynamics (closed loop) tables as well.

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GOLD PIG STI

thanks boys that answers my question well.

This should be noted by those in the GB for Grimmspeed BCS

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Funny looking German Subaru

where is the GB dave? i'm keen as mustard

edit: found

It was mentioned twice in the OP of the GB so I hope everyone read it and is aware of it before ordering one.

PS:what did you edit in the thread yesterday?

It's here: http://www.perth-wrx.com/vb/waynes-group-buys/37852-discounted-gb-grimmspeed-3-port-electronic-bcs.html

But it's now closed, however I will be doing another one soon so once my Vendor status is confirmed keep an eye out for these plus many other goodies.

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO