This is a VERY common question about turbos/superchargers. Many people will chime in and say “6-8 PSI on stock internals�. This is not always true. When adding a form of “Forced Induction� you are ramming tons of extra air into the motor, mixing this with more fuel creates more power. All “FI� setups are different, but remember this, you can add 50% more power to your car safely with a good tune, and keep the reliability aspect. Higher numbers can be achieved with a Great tune, and you can still have daily driving reliability. If you plan on using a boost reliant FMU then 6-8 will most likely be okay, but with proper tuning a stock motor can handle much more than 6-8 PSI. In some applications the tune can make more than enough power at lower boost levels, it just depends on the setup. So remember, that whole “6-8 PSI� rumor isn’t 100% true.

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1994 Civic coupe. B18C, A few Bolt Ons.