I will say I have not had alot of experience with RC, But... I just put some RC720s on ZHOUND's car and RC gave a chart with them showing that they matched ported them at 80% duty cycle. The flow chart at 80% was almost perfect..... They don't show you how they match at lesser duty cycles. Zo's car would not Idle....Two of the injectors were flowing way less at Idle and low speed.....If you richened the engine it would idle somewhat but start fouling plugs..... Two cylinders were not firing soooo I moved the injectors around and the miss followed the two injectors.......... We sent the two injectors back to RC. They couldn't do anything with the two injectors, but they could port two more for us. So I gave two more injectors to Zo, they ported those and it runs on all 6 now but some clyinders seem to be leaner then others at Idle and low speed. At mid throttle and full throttle it runs great and it also did with the 2 other injectors that it would not idle at all with. So for a race car these injectors are fine they flow perfict at full throttle, but I would not be happy with them in my street car that I race once in awhile. I don't know if this is a common thing or If I am being TOO MUCH of a perfectionist but I do know that RC told Zo they can't flow test 720cc injectors lower then 20% duty cycle.
