To hell with it, cheapest boost fix, just weld that worthless damn waste flapper shut!! Then you can save weight and money on all the extra bits the ECU thinks it needs.

ok ross, so iv got the boost control solenoid hooked back up (no more shitty boost tee). i run the stock air box with a silicone air intake and 3" zorst. so stock boost with those minor mods, should that be ok without an after market ecu ? shorly the 16bit ecu has some learning capabilities ?

the stock ecu has some tolerance for environmental influences, thats about it.

practically all modifications unless tuned for with an aftermarket ECU will result in poor fuel economy or potential damage to the engine.

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Long live the WRC

Whs^^

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[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

From what I have read here over the years I was under the impression that GC8's can handle breathing mods without a tune, but as you stated stace...bad fuel economy?

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....slow and steady wins the race....fark that!!

yeah, no question a my00 wrx can take a 3" turbo back exhaust, pod/panel filter, resonator removal and a small increase in boost with a bleed valve/boost controller. but at the cost of fuel economy. which eventually clogs catalytic converters, fouls plugs and worst of all contaiminates your oil, at the end of the day it doesnt reallygive you significant gains (maybe only 10-15 hp when its all fresh)

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Long live the WRC

ok thanks for your help guys, i am a mechanic but i havnt had alot to do with subi's as we never get them in at work and iv only had mine two years but havnt done many mods. i do know the consequences for modding vehicles with stock ecu's but i didnt know how far i could push the subi's. so again thanks i now have this knowledge under my belt.

I plugged a Turbosmart boost T one of the new ones today on my gc8 (it was my old controller for MPS) valve fully closed and it hit cut...
Very wierd cause it works fine with MPS...
Wondering if any one has heard of this problem and would it have same effect if i fit my profec B 2 aswell...

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Mazda 3 MPS