Greetings,

First of all I have a 97 WRX, Full 3" Exhaust all the way through hi-flow cat, AVC-R (LO = 0.7bar, HI = 1.2bar), PowerFC.

Now to my question;
Has anyone ever used a AVC-R with a VF34? What would be ballpark figures for punchy boost? At the moment my car is quite smooth onto boost and there is not alot of 'omg-kick!' - yes it kicks, but not as hard as the rate of boosting isnt as drastic.

At the moment my duty cycle is around 64% across the rev-range except for 5000-5500rpm where its at around 68% i think.

Any suggestions? I dont mind the current pull of the turbo but yeah, mate suggested it :P lol

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MY97 WRX N Limited Edition (Black)
VF34, PowerFC, AVC-R, Full 3" TBE
Ambi Pur SPEED Airfreshner (+30kw)

I'm not sure if you can ramp up the gain settings on the avcr (havn't used one), although id imagine if you did ramp it up so it came on faster your boost will become unstable as it would try shoot it down faster to the setpoint target boost.
id leave it and get a retune with the fc together to what u want, but it wont hurt if u tried to do it urself a bit

just to clarify i dont intend on running more than 'safe' levels of boost as im still got stocky internals :P

1.2 bar ive been told is safest well, safest in terms of maximum boost :P

__________________
MY97 WRX N Limited Edition (Black)
VF34, PowerFC, AVC-R, Full 3" TBE
Ambi Pur SPEED Airfreshner (+30kw)

the electronic controllers used work in a PI, PID fashion, ramping up the gain (P) too hard causes the integral (I) to react too fast in trying to go back to the set point boost (1.2Bar). the derivative (D) wouldnt be used

I dont know how the avcr works, but if it does have a ramping gain - then adjust it slowly at a time and go for a drive. Just make sure you dont ramp it excessivly - coz you'l see your boost fly way past 1.2 bar and then jolt back down to below 1 bar - then back up again etc etc = unstable

If it has a integral settings (also called time) i wouldnt touch that.

im not sure if the AVC-R has gain settings.
you can change the duty cycle of the solenoid at intervals of 500rpm - i havent seen any gain settings yet

__________________
MY97 WRX N Limited Edition (Black)
VF34, PowerFC, AVC-R, Full 3" TBE
Ambi Pur SPEED Airfreshner (+30kw)

wel the gain relates to the wastegate duty cycle, find out what the relationship between them is by playing around with the duty cycle?
the PI is control must be underlying stuff, unless its called something else.

ask Xspeed that play with AVCR's all the time?

you should be able to use this feature to adjust a quicker spool up once you learn how to use the thing to its full potential, it would do almost the same thing as controlers with gain settings.

i always thought for the price of the AVC-R unit you could save up a bit more $$ and get a complete ecu but thats just me.

I've also got a PowerFC but the AVC-R is handling the boost

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MY97 WRX N Limited Edition (Black)
VF34, PowerFC, AVC-R, Full 3" TBE
Ambi Pur SPEED Airfreshner (+30kw)

ah i see... its okay im just poor!!!! lol