Has anyone tried to do a true dual 3" exhuast? I've got two cherry bomb 3" glasspacks on the way and wanted to know if anyone has done soemthing similar and did it sound good?

No i dont think so. You might just be the first ever. Seriously though, there is a sticky at the top of this thread with about a bazillion pictures. I think you'll find your answer there.

Going by the engine in your sig, dual 3 inch is way overkill. Probably end up sounding like some farm truck too.

I know that it will be overkill for the short term, but I have many parts planned for when I return from my deployment and this way the exhuast will be one less thing that I'll have to worry about when I return. I leave in a couple few months so I can deal with the 'off' noise until then. I'll have a couple thou sitting in the account waiting to be spent on the car when I get back.

Your not pushing enough HP to be using a 3" true dual and I doubt you will be with any small upgrades your plannning.Stay with 2 1/2 if your going true duals. I wouldn't be worrying about the "off noise" rather the performance would be suffering.

I have 3 " true duals on my '83, excellent ground clearence too, but my floorpans didn't like it!

I've decided to post-pone the 3" exhuast until I get the car moving again. After I get the transmission issue fixed I'll worry about the exhuast so for now I'm going to put on the 2.5" single that I had already planned.

Would a true dual 3" be too much for a 383 with a Comp Cams 280 xfi cam, AFR 195's with 76cc Chambers, edelbrock performer RPM, Holley 750 DP and a set of Dougs LT's? Any ideas?

I'd say 3inch dual is too big for any thing under 400cid. Personally 2.5 dual is plenty big enough for a highly modded 350 or 383. By putting too big of an exhaust on an engine bottom end power and torque will suffer alot.

Depends on the volumetric efficiency of the engine. A 383 may pump more air (ie - power) than a 400 if it has better heads/cam/induction.

Forgot to add that this combo will be getting the gas...at least a 100 shot.

I'm running a homemade dual 3" X pipe system on mine. Almost 600 HP and should be in the 10's (was 11.40's with old 505 HP combo)
Heres pics

http://rides.webshots.com/album/573815401QtiPuM

dual 3 is good for a nitrous motor. I ran 3" y pipe to single 4" which is close to same flow as dual 3" and it was fine. Motor had plenty of balls even when off the bottle. 400whp on motor, roughly 520 on spray.

dual 2.75 would be good for most fairly hot 383's but hard to find any pipes/muffler in 2.75". 2.5" is ok but I'd rather be abit too big than too small

General rule of thumb is 2.2 cfm of flow for each hp made. I've seen standard figures of 115cfm per every square inch of exhaust pipe area so you can figure it from there. I had 500hp estimated so i needed 1100 cfm of total flow. single 4" is good for 1445cfm. Dual 3" is like 1625 cfm. Dual 2.5" is like 1129. So on motor i wouldnt have had problems with dual 2.5" but i wanted to leave some room in case i planned on motor power and also the nitrous which does create more exhaust so the bigger pipes are welcomed

I saw the pics, you got any sound bytes?

For the time being, because of time and money constraints, I will deal with the single 2.5 dumped right into the muffler right below the passenger seat. I still want to do true duals and I'm still trying to see if I can find a system that I like the sound of.

What do y'all think would be the best set-up for an 83 Camaro Crossfire 305 TBI? Right now i got a single piple with like a flow master or something I want it true dual, do you think i need it? I was originally planning on having the exhaust manifold 2 high flow cats, then glasspacks right underneath the drivers and passengers seat with a turndown elbo pipe, but now i just want that but with a dual in dual out muffler in the stock location. Thank you

305 is pretty torqueless, muffler and cat delete with a 2.5inch ypipe and 2.0-2.5 all the way back with a resonator/glasspack/muffler has worked great for me, retains a little back pressure but still flows better then stock