Budget 318 build
No. Try and get what you can get without going crazy. Generally speaking 1pt. in ratio is approximately 3% in power.
An example is, if you build a 400hp engine, raise the compression ratio from 9.0-1 to 10-1, you raise your up level to 403hp.
(412 HP, thanks 318 willrun. I did just rise outta bed. More coffee on the way!)
This is on a general, “Balanced combination.”
The percentage goes up as power increases. It is a ball park figure.