I'm an exhaust guy. Its what I do. It would not benefit me in anyway to leave the exhaust on the corvair alone. Not only is the pipe that's on there restrictive, it was only meant to be temporary anyway. I wanted to try my hand at something equal length, and larger bore. Nothing crazy. I had this dynomax muffler laying around so I blasted it and powder-coated it that zoomies purple color. I also had a v-band clamp and flanges and figured it would be nice to be able to quickly remove the muffler to do valve adjustments and whatnot. The system still starts at 1.5" because I do not have flanges that work for the 1.75" pipe. This is fine for me though as its only an 80hp model. If I had the right flanges I could make the complete primary tubes 1.75". The "y" pipe, or collector is 2" into 2.25OD which then goes into a 2.5" bend which is realistically still only 2.25" in the radius and into the muffler. The primary tubes fit snugly into the 2" and all is welded. The muffler outlet and tail is 2.25". At no point, other than the immediate entrance to my "atomic header" is the diameter less than 1.75" ID.
Here's what came off...
Here are my supplies.
My fabbed collector.
Inside.
Starting to get an i dea of what the hell I was doing.
The plan continues to come together.
One solid serpent.
Some of that good VHT stuff.
On the car.
Shamless Holesaw.
In truth it sounds very similar to what it did before, but it definitely breathes better. It almost like someone was standing on its chest and now it just flows really well. There is a significant gain in the higher rpms. The major thing here is that with the suspension completely unloaded the swing arm will hit the pipe. I had to tuck it up high enough so the bottom crossover is still the lowest point. I like it! A LOT.
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