I don't have any completed manifold pics to post just yet (RB26 of L28), however I wanted to share a few pics of a direction we may be taking with our manifolds, or at least an option one has if they so choose.Personally I have always loved pie-cut exhaust systems, so I figured we'd better give it a try. We have a Mazak rotary laser which allows us to accurately cut any geometry into a pipe or tube to within .004", so we can use this to our benefit. No longer are we confined to the 45's or 90's degree offering of a standard elbow, nor the long or short radiuses. So, we had a go to see if it would turn out like I had planned it would. It did... and I'm hooked.
The runner pictured below is done using 1.5" sch5 pipe (1.90" OD, .065" wall). Each section has a 5 degree taper to it, for a total bend of 25 degrees. The weld seams are argon purged, and 100% fusion welded using NO filler rod. If you were blind-folded and ran your hand over the pipe you wouldn't know it was welded. The cast fitting on the end is simply a threaded fitting in which to supply argon. This is what the exhaust manifold and exhaust system on my own Z will use.
IMAG1017 by
SENZA PARI, on Flickr
IMAG1018 by
SENZA PARI, on Flickr
IMAG1011 by
SENZA PARI, on Flickr
IMAG1010 by
SENZA PARI, on Flickr
IMAG1022 by
SENZA PARI, on Flickr
IMAG1026 by
SENZA PARI, on Flickr
IMAG1027 by
SENZA PARI, on Flickr
IMAG1031 by
SENZA PARI, on Flickr
IMAG1032 by
SENZA PARI, on Flickr
IMAG1033 by
SENZA PARI, on Flickr
Again... I know there have been countless exhaust manifold or group buy threads, however this is the real deal. This is what I do for a living, as this is what I love. I do not rely on anyone else, everything is done by myself and a very close welder who shares the same passion I do. If you need something, let me know. If you can dream it, we can create it. And thats all there is to it.
More pics to come!