HII

I have a question.
Sorry for the English, I'm from Spain!
I see that the in P and N only goes up to 4,000 RPM. I know I can modify it.
Is it so dangerous to increase the RPM on this engine?
Almost all motors can freely climb into the cut without problems.
Does this engine have something special that makes it more dangerous than the rest?
And the other question is.
The car never has backfires, not even a single small flame from the exhaust. I see that it has a very well done injection and ignition regulation.
But it's more fun when it has a bit of backfire and stuff...
Even when I put it into maximum gear, it doesn't cut off the ignition, it just stops accelerating, it goes silent... without making pleasant noises haha.
what do you think. Can any of this be modified without compromising the engine?

I have had Nissan GTR. Mazda RX7. Nissan 200SX and more things..
They all had ignition cuts, fire and fun without RPM limitation..


I forgot to tell you. My job as an electromechanical programmer..
Cloning of units and things like that... tune, but of European cars.
I have kess3 and more tools.
But I don't have enough idea to tune the corvette.

I have HP tuners. I have modified the exhaust valves so that they remain open in Sport and track.

I have installed. Dondpipe Xpipe and KN filter