Is it hard on a new engine to have a turbo or supercharger, if yes how hard is it on an old engine?

 

give me attention

 

 

It is fine if you keep it over 12 lbs boost. For each 10k miles after, add 1lb boost.

It is never good to run a stock motor under 12 lbs.

 

There's no need to bump your thread a mere 25 minutes after posting. And your question is so general that you can't expect us to give you anything but a vague answer. How exactly do you expect us to answer how "hard" it is on a motor?

Age of a motor is irrelevant. How many miles is on your motor is irrelevant. Condition of the motor is crucial, but simple compression and leakdown tests can tell you if it's still healthy or not.

Obviously, adding FI to a motor that wasn't designed for it is going to be harder on the motor. The more power you make, the harder it is on the motor. Above all, tuning is the key to a long-lasting boosted motor.

No offense, but I think you need to start reading up on FI before you proceed any further.

Oh, and just in case you didn't know, FI = Forced Induction.