dazdavies

iTrader: (22)

I have a reasonably modified UK Impreza turbo 2000.
My question is that I am soon going to have fitted and mapped my Apexi PFC and commander. Can this control boost or will I need something like the AVC-R.

The car currently uses the factory two port solenoid to control boost. Would getting an AVC-R be a waste of money if the Power FC does this already.

Cheers

Daz

ZEN Performance

it can control the boost out of the box, you can sometime get an improvement in contol using a 3 port solenoid, or a different restrictor with the 2 port setup. It will depend on what you're trying to acheive, the 2 port setup is good at dropping boost with RPM, which is often what you want on smallish turbo setups. AVC-R is more flexible, and configurable, but it's a lot of money for a little extra functionality, especially if it's not needed. The pre 97 cars benefit from an external boost controller, as the PFC only controls up to 1 bar with the factory MAP sensor, and the boost control kit is comparable in price to some electronic controllers.

Paul

dazdavies

iTrader: (22)

Thanks Paul,

I am "future proofing" the car as I shall soon be wishing to go for one of RCMS's Garrett / IHI GT35 Hybrids with a P20 EH.

That will be running 2bar max but mainly 1.5 for everyday use.

I have read that you can have upto four Boost setting via the Commander but I am wondering if The AVCR wil be the better option in the long term with the Mods I have in Mind.

Daz

ZEN Performance

The PFC on 99/00 will only read boost up to 1.8 bar, and the control for ball bearing turbos needs a bit of care. I'm not sure of the limit of the boost control kit,i think it's about 2.2 bar, which would be okay, but I would recommend the AVC-R for the better control which you will more than likely benefit from. It will still give you 2 settings, and "off" so effectively 3 settings.