Hello guys, I have an Evo 8 2005 I made some mods but with all I have I only push 279hp on a dynojet with 91 octane fuel. The mods I did to my car were GSC 272/272 cams old version, Evo 9 turbo, MBC HBC, 255 walbro, o2 housing, skunk 2 full exhaust, injen intake and intercooler piping, BOV turbosmart circulating, tuned at 20 psi, Now I never tune my car with the stock cams, after I install the gsc cams I did the first tune so i dont know anything the difference betwenn stock one or gsc cams to see if I gain or loss power, My question Do you guys think with stock cam I can make more HP? or Does the gcs 272/272 affects my power because of the Evo 9 turbo is small? Or Are this gsc cams good for what i have on my Car DD? thanks for the help

 

those 272's should be great for your setup. check for boost leaks, then turn it up some. you'll definitely break 300. 91 octane is gonna be a quick limiting factor though.