Do I need a retune?

[Benz_tech]

I have a 2.93 pulley tuned by John Lund racing. I have a 2.76 pulley and want to install it. I was wondering if I need to retune it and I asked Lund racing and they said no because
It is already tuned. I just want a second opinion if this is true. I imagined that after 13 pounds of boost that I run currently, when I hit 14 from the 2.76 the PCM would not know exactly how to tackle the new parameters.
Any input would be of help!

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[Mach828]

You fluctuate more than 1 pound of boost just from winter to summer.

 

[weaselp1]

Anytime you change boost levels (for example a pulley change) you change air/fuel ratio. At a minimum, I would have your tune checked for piece of mind. I know my tuner charges $50 to check the tune parameters.

Think of it this way if you have to change the tune that would be 300-400 dollars. That is alot less than $4,000+ for a new engine.

 

[KLLR SNK]

Without a re-tune or data logging, how would you know if the 2.76 doesn't puts your MAF or pumps on the edge?

 

[Benz_tech]

I have an sct maf, kb bap, and 63 lb injectors.
My bad for not stating that earlier

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