no really elaborate on how you decided that figure am interested on what mathematical equation you used to decided 145psi is the exact figure at which is goes from fine to fucked?. i could be wrong but am just going by the word of my mapper who when tested it said it was quite low but its running perfectly healthy and making good power so its fine to map. now i no he may be wrong but as hes known to be one of the best mappers in scotland and maps alot of time attack cars and such like id be surprised if he was was making such a school boy error of not guessing what compression figures cars