It's all about absolute pressure in your motor. 14.7PSI absolute at sea level. 10PSI absolute at 10k feet. So, if a guy is running 14PSI at 10k feet, you can run 10PSI at sea level with the C12. But I don't see any elevations listed above...maybe the 14PSI was at 12k feet...don't know. I have had great luck running my PG turbo and getting a det code when running a bit too much boost...and backing it off a bit with no issues. So, you could probably start at sea level with 8PSI and C12 w/ turbo domes and slowly increase it to 10K.