7afe loss of power Options

[Toynado]

hi all, i got a qiuck question, i got a stock 7afe with 4 into 1 headers and a performance filter and 17inch wheels, on sat we had a dyno day and my car made 76 kw at the wheels and 147 nm torque, it makes max torque at about 4000rpm and at max kw just after 4500rpm. there after it doesnt do much in the way of speed, i struggle to reach 195km/h my my friend with a stock 4age motor passes me like i'm standing still, the motor is newly rebuilt, question is why am i being creamed. the car pulls strong up untlill 3rd gear but when i put it in 4th i'ts all show and no go. is the dyno figures about right or not the workshop manual says it does 86kw dont know where the measure it though.

[Bitter]

the 86kw is probably at the crank, so 76 to the wheels isnt too bad. thats about 100whp and 108 lb/ft.

thats actually pretty good for a stock 7afe! advance your timing a few degrees to see if that'll bring your torque curve to peak a little lower again, or you can build up and raise compression some for more power across the powerband, however i dont think the price of the work would equal the gains. the timing advance is free, just run a higher octane fuel.