At what size injector with a flash do you start to significantly compromise idle quality and part throttle response? I'm currently flashed for 660s and I'm wondering whether I can go to 880s without turning the car into a dog around town.

I'm seeing over 90% duty cycle on straight pump and am still adding bolt-ons, so I'm a bit concerned that I will need more injector.

Mods are Buschur Stg 4, WR turbo and Helix O2. AFRs in the low 11s. 22 psi right to 7500 rpm. The duty cycle issues are generally in the 6500-7500 rpm range.

I'm about to add a ported manifold, turbine housing and a larger FMIC. I also may go bigger on the cams (currently 264/272) this summer.

Thanks.