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Subject How to stick a GT3076R where the sun doesn't shine...
     
Posted by LitlElvis on February 27, 2010 at 8:55 PM
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Message Personally, I don't like the front-mount turbo setups that most have been using to fit turbos of this size to a Z32. I like the turbos in the stock location... where the sun doesn't shine, but that's just my opinion.

Step one - build custom exhaust manifolds.

Step two - choose a material that will withstand the heat, a.k.a. expensive and/or difficult to work with. In this case, 304 SS Sch40 weld els and pipe, 0.145" wall thickness (3.68mm for all you metric literates) and custom 1/2" thick 304 SS flanges. One cut takes my el-cheapo Harbor Freight bandsaw five minutes to cut through. Plenty of time between cuts to relax and have a beer.

Step three - cut & fit, cut & fit... until you can't cut & fit any more.

Step four - toss in a few spot welds. Masking tape helps tremendously for mockup and holding the joints in postition for welding.

Step five - whatever you come up with, make sure it fits the chassis. Several of my previous versions were too tight at one point or another... if this happens, go back two spaces to step three :-(

Voila!

#5 cylinder's pipe has 3/8" clearance to the shock tower, the compressor housing has roughly the same clearance to the frame rail. The oil filter tree is going to need some massaging or outright replacement with a custom part - yet to be determined.

The turbine inlet is a T3, the collector pipe is 2" Sch40 SS, 0.185" wall thickness.

Clearance for the compressor housing was a beotch to accomplish here, but it's all good now.

Can't forget to mention step six - make custom motor mounts for turbo inlet clearance.

Step seven - weld the assembly, easy!... TBD.

Welding shouldn't be too hard, I plan to cap and fill the pipes with argon to prevent the "sugaring" that typically occurs on the backside of SS welds. I'll weld each primary tube separately, attach them to the flange and then work on the collector.

Will they crack? I'm not sure, I do plan to add some more support at the turbine inlet flange to help hold up the weight of the turbo and take the load off of the primary pipes.

     
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