Question when installing a Dynojet kit (carb diaphram slides

[Road_Clam]

Hey all,
Why exactly is it needed to enlarge the hole in the throttly slide when you install a Dynojet kit? What exactly is the function of that hole in the first place? I wasn't too thrilled about drilling out $90 slide/diaghpram assemblies on my carbs, but I am following the Dynojet kits instructions to the letter.
Rich

[Jethro]

The DJ kit should come with a drill bit to the proper size.

The purpose is that when you supply more air, gas and exhaust capacity, you need to equalize the action of the slide.

[Billy Ricks]

You should have gotten a lighter set of slides springs with the kit. The larger hole is necessary to keep the slides at the proper height relative to spring pressure under constant throttle and regulate mixture. The lighter spring action allows the carbs to be more responsive. Gets the slides out of the way quicker to build revs when you whack the throttle, less CV effect.

[KEITH KRAUSE]

Like Billy said. Increasing the vacuum port size improves throttle response.

[robinjo]

Rich I have a full set of correctly drilled slides for you if you want to keep your old slides stock.