My spark plugs loosen off after a high boost pull... Like finger tight when they're done. Also my compression ratio keeps dropping on my brand new turbo motor... it started at 170 right across the board and 2 of them are down to 125 and the othe ones are at 140... the build is fucked I know, I'm buying another new built block

 

Leak down test it, that will tell u a lot more as to what component is leaking. If u r using NGK plugs they are usually torqued to around 20 ft/lbs. Also make sure u r gapping ur plugs correctly.