Originally Posted by wayoutwest
Running 360/360 @ 20 PSI on my stock block (was 385/370 @ 22 PSI before i added a cat) with a .82 GT30R ... alot depends on what safety mods you have in addition to your power mods. Never had a hiccup. I have a lot of safety mods though. Keep in the intake temps cool and boost under control and that helps a lot. So I am not too much over 350, but have had a compression test and Blackstone labs test and both came back perfect.
The bold/underlined part of his statement is the key to reliability.
As you add power increasing mods, you must also upgrade other supporting components that do not add power to keep it reliable. Many people neglect mods that are for safety/reliability because they do not add horsepower, and they would rather spend that money on more power.
Hence, reliability suffers and stuff eventually breaks ... then they come on NASIOC and yell about how Subaru sucks.