the higher your revs the futher your injector want to be from the valve for power. F1 has its injectors outside the inlet tract, which i'm assuming will be where derms secondary injectors will be
Are you switching from primary to secondary?
I've heard people get better results phasing between the two, even using something like 80% outboard 20% inboard at full revs. This is in circuit applicatins so may be slightly different for a drag setup.