How much power do engine mods yield?

I love how if a n/a slant runs 14s, and its 'topped out' at '300 horse', but a slant runs a 12 somethin and its 'blazin fast' but is actually MEASURED at 300 horse. As in, like, dyno proven. But the slant that runs 14s on all motor has never been MEASURED, its just ASSUMED that it makes 300 and can't go any faster. Must be cuz it ain't got a snail on the side.

I think if two people build two slants, one turbo and one n/a, and they both make 225hp, one of em don't know how engines work, much less how to build one.

Oh, and the 'don't knock it till you try it' rings a bit hypocritical to me, seeing how you have yet to build a one on all motor... Btw, meth ain't all bad, don't knock it till you try it! Oh, and the most powerful slant was somewhere around 370.

Another thread, completely wrecked by fanboys...