Let me ask this question then...to all the guys that are running big cams, what size throttle body are you running? I already have a port heads, larger injectors, ported intake, full aftermarket exhaust (no cats), aftermarket air intake, I am already running a BBK twin 52mm throttle body but was wondering if i should step it up to the 58mm? Let me know, thanks for the help this far guys, i appreciate it!

 

It's a Comp Cams custom grind with a 112+2 LSA.

Also, I'm running a 52 mm TB.

 

I run an XFI280 in a stroker. I don't have the spec sheet handy but it was around 230/236 and maybe 570/577 on a 113 centerline. It's in an Impala SS and it has a ton of torque down low and pulls like a banshee till about 6500 with LE2 heads and the new unpainted beehives. The car ran an 11.76@119 and that was with a crappy launch. It has a nice lope but not too radical. The weight with my hogbody in it was 4380. It's a pig, but a fun pig.

 

bigsteve, if you are running an A4 with stock gears, 2.73 or 3.23, you will want to keep the duration below 224 or so unless you don't care about driveability, but it sounds like you do since you don't want to put a higher stall in there, especially if its 99% street driven.
The idle will get horrible if going bigger with that tight convertor and vacuum will get low and keeping it from rolling at those long red lights will become a prob... Been there done it with a GTP6 cam with around 600 lift and 236/242 duration, went to higher stall several times with 2400, 2700, and 3200 and none were pleasant. Ended up swapping again to a LPE211/219 cam and put the stock convertor back in and its much more pleasant to drive on the streets as a daily driver now.
Everyone likes different things, you may not mind a rough idle and some lowered vacuum, but just letting you know to be careful there... oh, the higher stall convertors with that bigger cam did ease the vacuum problems.

And you won't need that bigger TB unless you are going to be revving it past 6k rpms regularly, and with a smaller cam you won't need it at all...I had a 58mm and went back to a stocker now and some of the idle problems were contributed to the TB as well...no aftermarket TB that I found had the correct air passages for the IAC for idle...not BBK, not Holley.