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<blockquote data-quote="fozzymuphet" data-source="post: 4241928" data-attributes="member: 561353">There is of course a limit. And PSI (boost) creates HP so while your argument is valid that HP is what kills engines, PSI is what is creating the HP when applied with turbos. I can&#039;t remember the exact number of a 4G63 but the boost on a 420a is 8psi with stock internals. Anything over that and you&#039;ll be running into problems over time. That is why boost gauges and monitoring equipment is so important. Maybe you have 20psi coming from the turbo but you&#039;ve got a boost leak from the stock intercooler so your car only sees 12psi at the engine. Gotta fix those leaks too.well I&#039;m rambling and I&#039;m also not the guy to ask. I have a general knowledge of turbos, especially on 420a&#039;s but the specifics are something you need to find for yourself.Everything that you could learn from this thread is NOT enough info to do a turbo build. It&#039;s probably just enough for you to go to a DSM thread and not get laughed at.</blockquote>

[QUOTE="fozzymuphet, post: 4241928, member: 561353"] There is of course a limit. And PSI (boost) creates HP so while your argument is valid that HP is what kills engines, PSI is what is creating the HP when applied with turbos. I can't remember the exact number of a 4G63 but the boost on a 420a is 8psi with stock internals. Anything over that and you'll be running into problems over time. That is why boost gauges and monitoring equipment is so important. Maybe you have 20psi coming from the turbo but you've got a boost leak from the stock intercooler so your car only sees 12psi at the engine. Gotta fix those leaks too. well I'm rambling and I'm also not the guy to ask. I have a general knowledge of turbos, especially on 420a's but the specifics are something you need to find for yourself. Everything that you could learn from this thread is NOT enough info to do a turbo build. It's probably just enough for you to go to a DSM thread and not get laughed at. [/QUOTE]

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