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.

[GTS13]

Wow, I'm not trying to knock anyone's methods, and apologize if I've offended anyone. In this particular case it can help gains (minimal as it may be), but for someone that has just rebuilt their engine you have to admit that there could "potentially," I'm not gonna say there will be, but potentially adverse effects in the future. If you wanna recommend someone do something you should probably go all out.
For example, if you're going to advance your timing there's more you have to do in preventative maintenance. You'll need colder sparking plugs because the increase in timing increases the end temperature of your spark. You'll have to run higher octane, in this instance he already does but not for any real given reason. Other things follow, you can cause internal engine damage if the proper procedures aren't taken to take care of your engine.
"Timing is controlled by the relationship of the position of the piston to when the spark occurs. If the ignition spark occurs too soon it can actually push against a piston traveling up the cylinder as it's compressing the fuel/air mixture. This causes detonation, lost power, much higher combustion temperatures as well as higher emissions and early internal engine part failures."

I'm pretty sure I understand timing, thanks though.

This post has been edited by GTS13: Jan 31, 2007 - 7:38 PM