I've been trying to figure what is maxed out in my fuel system. I'm running a new walbro 340 and sender from racetronix, hot wire, 60 lb injectors and alky control kit set to 8 on a single nozzle. I'm having problems maintaining an 11.0 AFR at higher rpm's. It seems that after about 21 lbs of boost it starts to lean out fast and I have to let off. I've added a bunch of fuel to the chip and it made no difference and I also wired in a kenne bell boost a pump my buddy had and it made no difference. I'm thinking it's my stock feed line, any other ideas?