Hi all, I'm looking around at options for upgrading my car (01 WRX)

I'm considering running a VF23 @ 0.9 bar boost (13.5 PSI). I live in South Africa at the reef - about a mile above sea level and we have really shoddy fuel - 93 octane ULP. Currently my car has the South African tuned PPP (boosts to just over 1.1 bar - 16PSI) on the TD04L. My question is: Will 1.1 bar on the VF23 be too much at this altitude on the shoddy fuel? - I may be able to run it on 95 for some of the time, but not all of the time. I will probably replace the Up-pipe (with a cat-free one) to help keep the charge temp down, (rumoured to bring it down by as much as 100 degrees F). There are no MOT or any emissions regulations here (yet).

I guess it boils down to: Will the STD PPP ECU be able to look after the engine running the bigger turbo OR should I use a Dawes to limit the boost down to about 0.9 bar (say 13.5 PSI)

Any comment welcome. Thanks