CArkid0101 said:
...id be tuning with 93 octane, and like i was wondering what a safe afr is,
A safe place to start would be 11.0 AFR. From there, slowly continue leaning it out monitoring knock, AFR, and even EGT if you can. Every little piece of data helps.
CArkid0101 said:
...in advancing timing, well, first off what is it, is it the timing that the plug gets a jolt and fires into the cylinder as the piston returns? and what would u want to do each for. each as in, advance or retard, and how would you know when to do both, does it go with leaning and richening?
You right, it's where in the cycle the spark fires based on top dead center. You advance the timing for more power, but as it goes up, the chances of knock go up too. If the ECU is retarding/pulling back timing, you have knock that needs to be addressed.
Tuning is all a balacing act between; Octane/Fuel - Boost - Timing - Temps - Compression ratio
Compression ratio; is pretty much fixed (IMO on the high end) at 9.0:1. The higher the compression ratio, the higher the chance for knock.
Temps; keep them low. Keep the boost efficient, your intercooler cold and efficient, alky/H2O injection (only if you have to use these band aids). As the temps go up, so does the chance for knock.
Boost; quality boost is better quantity of boost. Don't push the turbo and make it blow hot air. If it's blowing hot air, temp goes up and so does the chance of knock. Depending on your fuel, you might make more power at 21psi. than you do at 22psi.
Timing; controlling it depends on what tuning device your using. Again as the timing goes up, so does the chance of knock.
Octane/Fuel; this is the easiest to control. With all the above things increasing the chance of knock, add a little more fuel at the right octane and you can make serious power. Not enough or some CA 91 oct.
laugh: ).... and ping, ping, ping, ping.
Like I said, it's all a balancing act. Address all of the above factors, take it slow and monitor the changes you make and you can tune your car. :thumb:
P.S.
As far as your wheel question, post that in the handeling forum. I don't know sh!t about what fits.
