That calculator you used sucks, as do most internet calculators. Whoever put that together would have gotten a big fat F in themodynamics, assuming they ever took it. They forgot to include the efficiency factor.

Here are the correct calculations for your data (assuming 80% efficiency).

The adjustment ratio for 7 PSI of boost is (7+14.7)*0.8/14.7 = 1.18

So if you had 9.5:1 compression then 9.5 * 1.18 = 11.2:1 compression which is possible with pump gas.

The adjustment ratio for 10 PSI of boost is (10+14.7)*0.8/14.7 = 1.34

So if you had 9:1 compression then 9 * 1.34 = 12.1:1 compression which is pusing it for pump gas but will not destroy the motor if done properly.

 

Pushing it as in certain octanes properly support certain compression ratios.

If I remember my numbers correctly the limit for 98 octane is between 11 and 11.5 to one. I think 100 octane can safely get up to about 12 to one.

If you look around on the internet there has to be some proper information on what the optimum octane requirements are for different compression ratios.

These number will be assuming your A/F ratios are optimised and are for the purpose of making sure your mixture does not spontaneously combust either before or after your ignition system attempts to start a controlled burn of the compressed mixture.