I rum Siemens 83lb or whatever and they are way to much for my 400bhp engine. I am running F88 management and the duty cycle is backed right off. I would go back to greys but the spray pattern is better on Siemens, I would have gone to 55lb but we mapped the engine on the 83lb and I have run out of time for an event im on this weekend. To get the AFR to anything nice on tickover they are just about injecting!!

James