Honestly, for 300-350rwhp SR is best
And that is the range most people fall under. Most peoples goal is around 300rwhp.
GT2871 (360rwhp) or GT28RS (335rwhp)
those are the only things you need on top of a regular SR (walbro, fmic, ehaust included in regular SR) to make a consistent reliable beat it to fuck every god damn day SR. KA’s will bend rods, CAs I don’t know but everything i’ve seen so far has shown CA’s cap right around 300whp before work needs to be done. RB’s produce way more power for way more money than anyone wants to put into a 240, and VQ/VG just scares the hell out of most people, and would be similar to the RB in that it would be expensive and too powerful for most.
So honestly about 8000 for a properly done 330-350whp car. The question is why doesn’t anyone do it? Its so popular in the states. These guys make the power all day long!
We’re talking 120mph traps on this setup easy. My car did 118 and it only has 326rwhp and i suck at drag racing. Plus S14s are heavier and less aerodynamic than S13s!
For the last time, in terms of money while keeping reliability at a maximum:
I have no problem arguing this point based on actual experiance rather than theory. Never “assume” things will just work out as planned. They never do, and it always costs thousands more. You need to consider this in your argument for why KA-Ts are better. They are awesome, but they ARE NOT CHEAP. Add that to the fact that ripping apart any motor and changing internals is a huge risk to that engine - now it is not nissan sealed anymore, and unless your mechanic is as good or better than nissan, life and reliability will go down.