True!
In that case (depending on the condition of his Fuel Pump / Injectors) replace them if need.
In future, if he's going RB26/30 and reaching for big power, might as well go aftermarket / larger injectors.
Anywhere between $200 - $350 a set... I got a set of Stock R33 GTR turbos, same as R32 GTR, I believe... Garrett T28 Turbo's. I'd sell them off around that price.