That’s. Or how it works in the real world. They use the same formula for different size engines but the percentage loss is smaller with a bigger engine. The 340 from 71 to 72 only lost 35 hp while also losing 2 points of compression. With the 318 losing 80 hp with virtually no compression loss u can see why u can’t add 80 hp to the low compression 360. I hope I explained this right. Kim