You can't really compare my engine with yours as 1 it's got a teg manual box and 2 it's head has been extensively moddified by myself with R&D work i've done over the last 7 years since i've been moddify these engines. And my speedo only indicates speed upto 140mph and the needle goes way past that espcially when running the carb stock box with the taller gearing estimated speed was around 155+mph as was able to over take a M3 which was trying to race me and there limited to 155mph. But mine is lighter as well which helps a little more in accelleration though.
But seriously though get a compression test done if your only pumping 140 or less your engine needs a re-build if you ahve 175plus engine is in great shape for 200k i'd expect between 125 to 150 on yours to be honest and around 90-125 or even less if it's shot.
Bookmarks