Tornado F3
It was intended that the F3 Mk104 engine would have a bigger Fan (62B) which was designed to give it improved zoom climb characteristics. it benefitted from improved mass flow, pressure ratio and small increase in bypass ratio. Unfortunately, the UK did not adopt this but ther GAF did for their ECR jets. In the work up to GW1, the RAF did borrow a number of these Fans from the GAF and fitted them to their F3's. This gave the engines a 4 to 5 % increase in thrust. Unfortunately, after GW1, thesse were given back to the GAF and the impression was that any enhancement to the F3 would affect the case for Eurofighter. A number of other engine enhancements were looked at to either give additional thrust or increased engine life but again, the funding was not allocated. You cannot really give an engine optimised for low level a slightly longer jet pipe and expect it to perform well at altitude. the earlier point that Typhoon 'sips fuel' is the case in point. EJ200 cycle was always optimised as a fighter engine with significantly more thrust and significantly lower bypass ratio than RB199.