I have IB Probe 12:3:1 pistons, IB ultralite rods with new bearings, All skunk2 internal, skunk2 cam gears, and other mods ( if interest read my signature). But my comperssion are unsually low for the mods that I have. there are 180 for all four. I dont know what could had cause this but LAST NIGHT, I TOOK IT TO A LOCAL RACE TRACK AND DID A 100 MPH AT 14.5 A LITTLE FASTER THAN MY STOCK TIME. THIS REALLY disapointed me since I have spend over $3200 for parts and labor. If the compressions are higher, then I probably hit mid 13s or somewhere around there. I will do a leak down test and find another reputable shop to check why the compression was so low with high compression pistons(this is the only way to find out if they prior shop actually install all the parts that I bought). I dont know if this is the problem because of the EASY BREAK-IN (DRIVING FOR 600 MILES AND GUNS IT). I kinda skiptical to use other methods since everything such as rod bearings, rings, valves and other stuffs are so new and if I use other method of hard break in, i might overload them and crack them. The possible things that could cause low compression is that the crank bearing might be broken or I might have a cracked cylinder wall since everythings are good and no sign of any problem. Other thing that I will do is complete the process of getting hondata and tune it and see go from there. thanks for the helps guys.