We just got my friends 91 si running with 8 lbs. Temporarily(emphasis on this part), we are running a fmu for the fuel. It runs pig rich, but at least it can be driven while we decide what else to do. Anyways, that is the background for my question.

Now, here is what I know... I have always heard not to tune a turbo setup with a afc hack because when you add fuel with it, it advances ignition also, which is the opposite of what you want.

Now, my question... The fmu is a 12:1, it makes the car run very rich, I mean, it makes you dizzy sitting at lights, lol. So, if I use a afc hack to remove fuel, this would retard timing right? I just like this idea better because then I can street tune with a wideband without my laptop and having to remove and reinsert a chip. Someone please explain this to me. I know it is best to use something like turboedit, but for some reason, I am just drawn to the simplicity of the afc hack, that and it always shows me what its doing. I know a set tune is good, but I like to see what its doing, not that its important, I just like it.......


Thanks.