More a technical discussion than anything else , did copy paste to an engine discussion board hence why it's so vague about Lancers lmao but I feel this is a good place to post also Wanted to get kinda a general discussion going about engine sizing and outputs etc more than about my actual car so it's not limited to people with knowledge of specific cars etc Ignore my ignorance as I'm asking because I wanna learn not because I know, i may ask stupid questions etc I'm fairly technically minded, was a mechanic for a couple years..but never built a motor, pulled a couple down etc and am wanting to experiment with them (obviously not gonna jump into some crazy motor but food for thought I guess) I have a fairly low power front wheel drive car, and am toying with a couple motor choices It's a 2000 Mitsubishi Lancer / mirage in some countries Factory its a 1.8L sohc (86kw) and had previously swapped to a 2L of the same architecture Am onto a new shell and it's a stock motor again, i still have my 2L but want quite a bit more out of it Wanting to keep it n/a Also wanting it to be fairly light as it's a hillclimb/circuit car so straight line speed is great but I don't want a big 3.8 boat anchor hanging out of the front of it even if it does make way more power than any of these options do.... But I've kinda got a choice of putting a small or big 4 cylinder in, options are Standard 124kw ish (all according to spec sheets) 2.4L sohc mivec motor out of a newer Lancer 125kw 1.6L dohc mivec (with extra lift like VTEC motor from the ck4a/JDM Lancers and mirages 92kw 2.0L sohc motor (what I have sitting, is low KMs and good condition) 142kw 2.0L V6 mivec from an fto Or something completely different, most of Mitsubishi's stuff is "Universal parts bin" for the same motor family so heads can be swapped etc so I could use the mivec lift head on the 2L block and people have seen 150kw at the wheels with a fair amount of work done to them The V6 is an easy swap and makes decent power but probably not quite what I'm after, with a e85 etc I'm sure theres more in it but it takes away from the *poo*ty 4 cylinder aspect that makes me like the car But am I better off with a small engine and it's ability to rev, would a 'square' motor be better and just ring the neck of it all day long Or would a bigger displacement motor be better for torque and overall grunt? In an ideal world what's the best way to make power from what would normally not be a powerful motor Can a sohc motor with a good flowing head and we'll suited cam size compare to a dohc engine? What is the limit of what we can rev a 4 cylinder too? And around what parameters? Tight ring gaps etc how much different would it make? I know with F1 cars etc they'd basically lock up if started cold? What compression ratios can be achieved on a n/a car, is there a limit where you'll start losing power with more compression because you can't have the timing as advanced? Individual throttle bodys? I know they sound cool, but from what I've found they are kinda old tech and don't give a huge advantage anymore compared to a well designed intake and plenum...plus space is a constraint because the intake is at the back of the engine bay and the exhaust is near the front Semi plan is e85 as it's readily available near me, high compression, high rev limit, big cam But at the same time I want it to be drivable at lower rpm hence why I was thinking of mivec heads but they are expensive and hard for find near me and performance parts are the same being expensive etc Obviously it's going to be a timely and costly project and am in no huge rush to get it done or even start etc, I don't wanna dump $100,000 into the car, but at the same time do plan on keeping it for a while and like that it's different etc Realistic goal is around 150kw at the wheels, which is way more than double stock power, more would be great but it gets to a point where it'd be so much easier to turbo it to make big numbers and that's not really what I'm after, I want a lightweight responsive car thats got a bit of power to back it up Reliability would be nice, no point making a motor that's gonna last 3 track days so I've gotta be kinda sensible and walk the edge of the line for pushing it further than some have Also interested to see what 4 cylinders people have and what power etc, I'm sure I've missed heaps but that's what's floating around on my mind Happy for any input within reason, turbo not on the menu, have a much more powerful turbo car and I see no need for 2, would rather 2 completely different cars Thanks for reading this far lmao!