[turbo69bird]

I think he put screens in after he drilled them and tried to make them a poor man’s velocity stack. But without back to back testing you may have just destroyed airflow . By making it turbulent. Every modification needs testing to prove or disprove its usefulness . The old school stock eliminator guys had crazy tricks but they were well tested.
Like they would loosen the front bolts on a carb just enough so when it went to full throttle the carb would rock back causing a vacuum leak but they had already calculated how much they had to jet it up for this, that’s why early stock class cars were always revving in the staging lanes . It was because they were pig rich all the time . Some guys even hid vacuum fittings and put valves on them so they could tube this set up. This was to effectively make the carb have more CFM


I remember when guys would sandwich screens in under carb spacers to straighten out the airflow and of course there were the turtles in the bottom of the intakes. Sometimes to direct airflow sometimes to change volume . These were tricks the guys in NY NJ used a lot . Simple little things like turning the nuts up on firebird front shocks so there was some unopened travel. A lot of it was stuff you made back the. Or did to cars yourself. But much of it worked well

Back to the drilled tops, it’s funny how air flow works sometimes. Like w houses if you have vents in your gable ends you never want a ridge vent in your roof . You can have one or the other but never both. Neither will work at all if you have. Both and you’ll get mold in your attic.

Meanwhile your sitting there thinking well I doubled the air flow why do I still get even more mold .