First, your friend has no clue what he's talking about. Injectors are not rated by how much boost the engine makes. Yes, a lot of highly modified/built Lightnings have fuel upgrades that include using 60lb Siemens Deka injectors, but your stock injectors will still flow enough fuel for a moderately modified Lightning.

Sure, when you add an aftermarket supercharger and start pushing a lot of boost through the engine, you'll need to upgrade the injectors to stay safely within the envelope of safety, but the stock injectors are not rated by boost.

Second, please post a complete list of your mods. Simple things like a CAI will cause your stock boost gauge to record a higher than stock reading. The average reading from the addition of a CAI unit will be 1.5 to 2 lbs of boost.

One last thing, are you going by your stock boost gauge, or an aftermarket gauge?

What was the outside temps when this happened?

Stewart