IBoughtASupra;1766194 said:
With that said, you are on stock twins, keep the boost around 10-12PSI. No more, enjoy it like that and save up to go single. You don't want to turn up the boost any more because it is a gamble with the condition the twins are in.
I started out at something like 8-9psi on the stock y-pipe, that went up to about 12psi with the ebay POS y-pipe, and with an MBC I have run upwards of 16-17psi, but if it hit around 17-18psi, it would hit fuel cut on me, so I backed off. Honestly though, 12psi feels pretty similar to 17, because either way the stock turbos become a flow restriction around 5000rpm, at least on my car. Feels great until then, but after that, it honestly feels like an NA engine.
All that said, if you run much more than wastegate pressure, you're asking to be replacing turbos at any moment... I've been fairly lucky, but I'm almost positive one of my turbos had been replaced by whoever owned the car my engine came from in Japan. Even still, I'm never surprised by a CT12a going bad.