Exactly. I'm not sure what the exact question is. If you want to make a 2 litre engine generate 800 hp its been done. Is it fun to drive to the grocery store? Will it last 100k? Is it cheap? WIll the rods go through the pan one day? These are all questions engine designers have dealt with. You need some requirements to determine which one of the infinitely variable combos will be best for you.