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]

advancing the timing does show nice gains for the money spent, which is nothing. on 89 octane the 7afe can safely run 15 degrees of base timing.

its a pretty widely accepted thing to do with the FE engines, the chamber design is very knock resistant.


if you dont understand what timing does and how it all works then just dont talk about it GTS13. timing is where NA power lies, even moreso than AF tuning. finding the right amount of advance or retard is what its all about, ask anyone who tunes engines and they'll agree.