I would have to SERIOUSLY lower the compression to run 25psi. The motor is 11.5:1 compression. Guys are running 7-8lbs reliably in stock motor. 8lb's with a vvtl-i controller, intake, bigger injectors, trd exhaust, and a dyno tune are putting about 225 to the ground. More than enough for me. but in all honesty I want to stick to simple bolt ons. I bought a 5 year/60k mile extended warranty, so anything I add needs to be able to come off quick if it needs to go in for service.