SS-Chrome turbo manifold
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ARE YOU CRAZY? 
09-29-2003, 11:02 AM
#23
1.0 BAR
Join Date: May 2003
Posts: 200
Re:SS-Chrome turbo manifold
JB Weld does NOT hold in high exhaust temperatures. It undergoes a chemical reaction and turns to a powdery substance.
You can use it to clean up intercooler piping welds but not on any part of the car's exhaust.
You can use it to clean up intercooler piping welds but not on any part of the car's exhaust.
10-23-2003, 08:02 PM
#28
0.0 BAR
Join Date: Oct 2003
Posts: 10
Re:SS-Chrome turbo manifold
in regards to earlier posts. if your stainless manifolds crack all the time or the flanges warp a lot, then whoever is making your manifolds DOES NOT know what they are doing. the trick to keeping a manifold straight without cracking is through design. some people make such bad designs that when parts of the manifold expand due to heat, they expand more than other parts therefor the flange warps. and a reason that it may crack can be because of welds. a lot of heat put into a metal through welding weakends the metal around it changing the structural composition of it. a lot of heat in the weld causes sinking, when the filler and molten metal sink deeper into the metal causing very small cracks when it cools. but a properly constructed grade 304 stainless steel manifold, is pretty much guaranteed to outperform most cast iron, and DEFINETLY mild steel manifolds. mild steel is garbage, the high heat pretty much cooks any heat treatment out of it anyways. anyways thats my contribution.
10-23-2003, 11:02 PM
#30
1.0 BAR
Join Date: Jan 2003
Posts: 403
Re:SS-Chrome turbo manifold
Originally Posted by tranceminister
Pretty good for a 1st post... Welcome aboard!!! 
Here's the deal if you use stainless tubing with thin walls even 10g. It has to go through a chemical or heat treating process called Annealing(sp?) Because Stainless steel is made up of different types of base metals the metal needs to be softened in order to bend it. When it is sofetened and stretched ro make a bend it gets much weaker and thinner. CRAAACK! The good manifolds are made form Cast stainless. If it is done right it should be fine because it is not being bent but is cast in a particular shape.
And there is a way to get back the strength when a material is annealed... it is called normalizing when a finished product is heated to a temp like 1600 deg for an extended period of time. this does not however make the material any thicker.
And in closing
.... for the most part mild steel is the best all the way around - then ceramic coat it! hope this helps
