Send us a graph of the fuelling/boost against power with the fuel pressure at the correct level, and if you are 100% sure the car is perfectly set up we can adjust the chip for you.

The t34 55s chips are usually conservatively rich enough though, its unlikely they are lean unless there is an issue or spec issue because they run the t34 flat out and there is enough fuel in those maps for this on a t34., its almost impossible for them to be lean if they are correctly set up,

What boost does it run? What T34 variant is it?