Dipper wrote:already haing a k20 fitted i'm interested in it's limitations but also its potential in NA form.
Scuffers you might know this? mine is a stock uk engine as far as i know and ive a dyno print out showing 228bhp which is about right. ive not driven a sc car but im fairly sure id like to keep it NA. without going mental(say spending 2-4k), what could i reasonably excpect from a tuned NA? 250? 270?
half tempted to source another engine, get it sorted out and do a straight swap with mine
would i be better with a K24(possibly pricey unless my existing manifold will fit)
ive had a rake through various forums but trying to separate fact from fiction is near impossible!
realistically, without spending money, there's not much to be gained on a std engine, yes, you can get 4-5hp here and there, but the costs mount up very quickly, and once you start talking about cracking open the engine for XYZ then it starts to get well out of hand very fast.
even with a big budget, to get 280+ out of a 1998cc one is near impossible (unless you want to spend £40+ K on engines)
yes, K24's can make more power but at the cost of revs, which tends to make them not so nice to drive (although that kind of depends what you're into).
forced induction is the cheap easy solution, std engine, simple bolt-ons, jobs a carrot, once you start to have built engines, costs go up massively as does reliability in the opposite direction.
Big problem with all this stuff is the interweb sh*t, for example, was reading a thread yesterday about somebody claiming some 698Hp at the hubs from a stock K20A2, no cams, nothing (apart from a big ass turbo etc) on 28Psi (~1.9Bar)
now, that's just not remotely credible, ignoring the loads on the rods/pistons etc. consider that I am only getting 570hp using 2 bar of boost, with a bored out 2,140cc built engine (and I am sure I will get told it's all in the tune etc.!)