|
Head/exhaust question
So my car has an LQ9 with 241 heads and 9.8:1 comp ratio. It also has a 4in qtp y pipe and 4in cat back, with qtp stailess headers. I will be adding magnaflow bullet style high flow cats in 3in to add alittleback pressure and pass inspection. Now heres my question, what would the compression ratio be with ls6 heads? Should I get a smaller exhaust system to add back pressure? My car made 407 rwhp what would it make at around say 11.1:1 copm ratio?
|