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thank you for all this information. I will start checking things and refer it back to my mechanic.

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Lots of useful information here, thank you all.

Under hard acceleration it goes to 15psi but it’s shift time so I don’t know if it would continue to climb. Are you saying that I could be forcing a lean condition at 15psi?

The car only had 1k miles put on it in the last 20+ years (it now has 52k) so there are lots of minor issues. It has a new actuator and replacing the vacuum line to the actuator gave the boost...

Thank you. I don’t drive my 93 IROC R/T real hard but after some parts replacements it has jumped from a max of 6 to a max of 15 on the in dash gauge, do you think that is acceptable for short bursts?

Can anyone tell me what the maximum boost should be on a stock T-3 motor? Thank you.