Want to build costom turbo kit. Need advice from boosted guys!

[scioncrew]

Originally Posted by pimp my yaris

I am having trouble tuning for above 16psi with my FIC. I believe it is ignition problem. Above 16psi I am getting a nasty missfire between 3500 and 4500 where my boost is getting to 18-19 psi. Still working on it, I havent givin up yet. I will try to retard timing a little more at high boost to resolve this. Any tuners out there run into this? I noticed that tuning with the FIC is getting tough as boost climbs. My AFR's are fluctuating a lot within the same cell on my fuel map.

you got to stabilize you AFR. give it some more fuel make run 11.0-10.5 AFR then work your way back. you should not be misfiring like that if you have the proper fuel deleavery system in you car.