Josh: Thanks alot for hosting these pics.
Also, thanks for the compliments from everyone that posted.
For me, once I am done with an exhaust system I really don't ever want to do one again. However, that feeling seems to fade with a little time. This exhaust was quite a bit easier to fabricate than the exhaust system for my '67 Corvette with a 632" motor. That exhaust system consists of 4" oval tubing that splits into two 3" tubes with two 3" mufflers - on each side. There are 4 mufflers under the back of the car. Now that was a challenging exhaust system! There is more info and pics on that system on the "other" corvette forum.
The exhaust I had on the Callaway prior to this one consisted of 3" tubing from the turbos into each Random Technologies cat. From the cat I continued with 3" tubing to just in front of the rear-end. At that point it connected into the Power Effects 2-3/4" exhaust pipes and then their capsules. With the valve in the Power Effects capsule fully open, the car made of 600 rear wheel horsepower. I destroyed one of the cats when the car overboosted and detonated. I replaced the cat but have since decided to eliminate them all together.
This current system is made of 3" tubing all the way from the turbos to the DynoMax 3" Ultra Flo welded mufflers. I selected these mufflers after flow testing on a SF-600 flow bench. Let me just say that they flowed SIGNIFICANTLY better than the Power Effect capsules. An added benefit of these mufflers is that they are relatively quiet. That's right - quiet. They are louder than the factory mufflers, but not objectionable. Compared to the Power Effects capsules, my wife and I can carry on a normal conversation while driving the car.
I TIG weld all my systems and even grind inside the tubing after welding to get as smooth a finish as possible. I am a little anal when it comes to this type of stuff.
The exhaust is not powder coated. I use Plasti-Kote Hi-Temp black paint on all my systems. It leaves a powdery finish that wipes off and reveals a unique appearance.
I hope to start testing on the DynoJet by this weekend. I am in no hurry - one of the luxuries of having your own dyno. I will leave the car on the dyno until I am satisfied with the numbers. I am going back to square one as far as boost control. I just removed a Norgren valve system that applies pressure to the backside of the wastegate. I want to try some of these new manual boost controllers I have seen. Actually, there are a number of things I will be trying - but that is a discussion for a different time. Suffice it to say that a data acquisition system like my Racepak is invaluable to this type of testing.
Steve