So I have a P29 ecu running the dohc zc, I run after market springs retainers, valves ect. I have researched this extesivley and I can't come up with much besides junk. So all im interested is raising the rev limiter to 8000-8200, I've read the lower end is good to 8500 (just read forum about this). does anyone know a company or private person that has a good reputation in dealing with the P29? I do know about hondata I just can't affored it atm.