These injectors aren't bad. The only smoke I see is on a cold engine. Then it leaves a blue trail behind it.
.
Any upgrade injector can be made to work. How they perform is controlled by your injection pump setting. In my case these large injectors don't act any different than my stock injectors did. But they were good for a 6 PSI increase in boost with no other changes. They do give me the option of whatever HP I want to run. These injectors can do over 500 HP with the right combo of parts.
__________________
93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, auto, 3:07's axles, 2" skyjacker lift, B&W flatbed