Im new to 1jz's. I myself dont have one Im asking for a friend. I was wondering what the stock psi is set at for the twins and what the max psi is about? I tried searching and got a few threads not exactly telling the stock and max psi. I even tried google and wikipedia. I found 18-22 psi is the max and even then there are reliability issues. So please if you could tell me stock twins psi and there max psi thatd be great.
2 1JZ boost questions.
- Thread starter timothyphicks02
- Start date
Thanks foreverpsycotic.
and yeah I understand your point suprahero I mean if the engine is stock and good condition. just a ball park stock psi and a reliable max. if you want to factor in age and wear over the years if possable... but just looking for a rough figure for a good stock engine.
and yeah I understand your point suprahero I mean if the engine is stock and good condition. just a ball park stock psi and a reliable max. if you want to factor in age and wear over the years if possable... but just looking for a rough figure for a good stock engine.
Personally, I would do a 3" turbo back exhaust and call it done. You should see around 14psi with a 3" downpipe, cat and exhaust, and you will see another 1-2psi with a test pipe.
Mine run around 13-15 with a 3" turbo back exhaust and 2.75" intercooler piping and a huge front mount (probably more than I need but whatever) intercooler. I have heard of some running 18 psi consistently and others that crap out at 15-17. Pretty much if he wants to raise his boost he needs to do it with the understanding that he might have to replace/ rebuild soon.