Custom Oval exhaust
 

So I got a gtx3076 gen 2 with v bands. I was going to just make a new down pipe and modify the crossover.. but then I have always wanted to do an oval exhaust.. I know the flow isnt great and I did 3.5in.. probably should have done 4. Anyway.. 2in merg on the header to 2.5in crossover into the turbo. 3 in out to 3.5in oval back to a 4in muffler and exhaust tip. All stainless. I will post my progress here and include vems for each part, crossover, down pipe, and exhaust.l when I am done.

https://cimg7.ibsrv.net/gimg/rennlis...d811379703.jpg
Header converted to vband, crossover to turbo inlet.

https://cimg5.ibsrv.net/gimg/rennlis...35f50dddda.jpg
Downpipe, 3in

https://cimg0.ibsrv.net/gimg/rennlis...c1bf50a6e5.jpg
Oval 3.5in pie slices up to meet the 3in round down pipe... sharpies setting the gap.

https://cimg2.ibsrv.net/gimg/rennlis...74f0c5fea0.jpg
Keeping it high and tight, its challenging to miss the suspension and the half shaft.

https://cimg3.ibsrv.net/gimg/rennlis...8de4bba3b9.jpg
4in muffler to 4in exhaust tip... also ovalized.. I have a theme.

Nice looking work :)

Is the first pic welded on a mechanical rotating device thingy???

Nice.

Excellent welding too.

T

hardly a difference in flow quality from round to oval until the oval starts getting "really flat".

you should be fine, looks good.

Yes a find at a local machine shop auction. No one bid on it so we got it for cheap and then put a cheap 3 jaw chuck on. First time I have really had time to use it... makes it way easier to be consistantly, and way faster to weld. Welding is fun. Getting into position and moving stuff is a pain.

The hydraulic radius of oval pipe will impose a higher pressure drop than a round pipe. Not really a problem til the oval gets very flat..

Very nice workmanship.