Line/Rectilinear Infill Speeds?

I’ve been testing some different infill patterns on my P1P, and hoping to use more line or rectilinear for better surface area. I’ve never had an issue with print consistency using the default Grid at standard speeds, but I’m getting some really rough infill on line/rectilinear—I’m getting build up or chunks in certain areas which shows through on my top layers. I know I can adjust temp, speed, flow, etc. (which I’ve done) but I was wondering if anyone has been successfully printing at default speeds with a line/rectilinear infill at 15-20%. Do I just need to reduce the infill speed? Obviously I’d rather not do that if possible.