Dave.. the only time you should use them is to match up the intakes to the stuffers on the VF3's.. If your using a White Knuckle intake.. the stock VF3 stuffer matches up perfectly.. but if your using a boss intake with the square opening.. then the cascade stuffer should be used. I used them with my Boss intake.. but when I got the WK intakes.. i went back to the standard stuffers..
yeah.. you can use the cascade stuffers on every intake.. but its not always needed is my point.. The only time their needed is if your intakes have a square opening. Like my Boss 2 piece did.. If you put the cage up to the intake you could see where it restricted the flow. I had my stuffer all mapped and ready to grind.. I swtiched back to the VF3 stuffers when I put my white knuckle intake on,
But I can tell you I'm going to grind the intake side of my intakes a little after the season is over...open them up some more. I think there might be a little more power to be had there...
Off topic again.. but wouldn't increasing intake velocity rather then intake area create more power??
Maybe a builder could chime in and set me straight.. I've always been a firm believer in intake velocity over area. Thats one of the reasons I went back to the VF3 stuffer rather then use the cascade stuffers with my WK intakes.
velocity vs area is going to be on a case by case basis, even the same motor ported by the same person will react differently sometimes. But as far as intake matching goes, it is always good, a ledge sticking out is bad and will cause a restriction, and even a reverse ledge will cause a swirl, so its best to have them matched up.