I have a 1987 Mazda Turbo 13B engine in my Mustang II kit plane.  The primary injectors in the center housing are stock Nippon Denso 550 cc peak and hold.  Below each injector is a plastic insert called a “mixing plate”, which presumably disperses the fuel coming out of the injectors before entering the combustion chamber.  I am wondering if the obstruction in fuel flow caused by the grid on the mixing plate would make the engine run lean at higher engine speed, such as 5,000 to 6, 000 rpm.  If I used a different injector, such as the RC 550 cc (which has a better spray pattern), can I eliminate the mixing plates?   What happens if I keep the stock injectors and just remove the mixing plate?

I welcome comments from anyone on the list, but hopefully, racing Guru Lynn Hanover can shed some light on my questions.

Thanks,

Bob J. Rogers

N62BT