Corvette Performance - low,surging idle

i just installed an ls1 hotcam that a friend gave me in my 99 c5, sounds great at idle but tends to surge and idle low almost to the point of dying.
wandering if drilling a hole in the throttle blade will help? i am a little low on funding so ls1 edit and dyno tuning are not an option yet. it is a 6 speed car and everything else is stock.

drilling a hole in your tb will help out. a buddy of mine drilled mine out .25" and it helped out alot as far as surging goes

researched rilling the throttle blade, it is not advised because of the elctronic throttle control system,looks like i have to get it retuned

What is the correct RPM for idle? I have am 01 C5... @ idle, it sits at 500, but sometimes when shifting from park to reverse, or from reverse to drive, it drops below that and seems to bog for a second.

It doesn't do it at any other time. Should this be a concern? I'm bone stock, BTW.

The idle needs to be tuned. The decay and idle values sound like they need to be changed. And 500 seems very low GA_Driver. My idle is set at 850. Stock was around there iirc. I would think an A4 car would idle about 800-1000.

So I need to go ahead & get the HPtuner, then. Or maybe check for a frog stuck in the fuel filter. :D

GA_Driver check with another A4 driver. That may be normal. A friend of mine with an A4 Fbody says his idle was around there stock. I would have thought an A4 would idle higher than an M6, but I've never owned one or paid attention to the ones I've ridden in. You're probably fine.

I'll hit corvetteforum (ugh) and see what Search turns up. And thanks for replying, I appreciate it!