Cant even compare a gsr to a k20. A Gsr with a fully built head and cams will still get walked by an i/h/e k20.
Ive seen bolt on K20s make power in the low 200s, and thats intake/header/exhaust/reflash
To make power like that on a B series its going to take much more than a built head and cams.
I love the B series, I have one myself, but the K series platform is superior in everyway to a B series
I would assume that a stock K20 "T-S or Si"
Would put down around 180 to the wheels. Maybe 15 or if you have some real nasty bolt ons & maybe a tune, 20whp. that will be around 190-200whp and some nice torque.
(Of course this is all over estimating)
After all the money you spent putting into that K20 and putting it in, you have a fully built GSR N/a engine. That engine my buddy built cost him 8-9k.
So, would you like to tell me how logical it would be to swap in a k20?
Take into consideration, that it will be harder to tune, bolt ons are far more expensive, as well as internal modifications.
Yes, a GSR can hit 200whp with a built head & a good tune. Go research it. And thats spanking stock K20s. And yet that K20 would still cost thousands more & to swap in.
Bring an RSX-S or SI into this, and a 200whp Integra GSR would leave them dusted on the line due to the weight difference, even with bolt ons.
The only way a K20 is a logical choice is if its already in your car stock or came with it."or if money wasnt an option"
Even though, an Integra GSR is almost on par with the RSX-S. They will both be on par once you start building, but the GSR is cheaper. Yes the RSX would be making more power, but the weight difference would be hoding it back to remain on par with a GSR always.