Subject	lets examine why it happens...
Posted by	ni[X]it on January 13, 2008 at 6:29 PM
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In Reply To	Even the GD inconel's cracked posted by nzryan on January 13, 2008 at 05:35 PM
Message	support. Period. you're hanging 15 pounds of turbo off the manifold. the turbo is cantelevered aft. this puts even more stress on the tubing. ok,...ok,... now, lets hang some EXHAUST off that turbo. that's 15 pounds of weight more, hanging even MORE cantelevered off. more stress. Ok...ok... but nixit(prixit), is that ALL? NOOOOOOO Lets heat up the exhaust material... now you have two dissimilar metals (filler/tubing), at high high temps... and excessive loads (cantelevered)... and KerPOW, you crack your manifold. I've also seen a guy use his exhaust to jack up his Z32. very nice. Petz #3
Follow Ups	cracked manifolds - nzryan 16:33:52 01/13/08 if you are a good welder they shouldnt crack anywhere - Antonio(AZ) 17:25:28 01/13/08 Even the GD inconel's cracked - nzryan 17:35:03 01/13/08 lets examine why it happens... - ni[X]it 18:29:05 01/13/08 but what would full race do? - aliaZ 18:48:06 01/13/08 Put a manual boost control on it... - Dallas DamonZ 19:14:18 01/13/08 lol, ya... That guy didnt even see what was wrong with that. - Waco300zx(DFW) 19:12:34 01/13/08 Dont forget the wide spectrum of intense vibration... - CaliguyPurdue (redesigning) 19:16:44 01/13/08 The GD inconels are fully supported at the flange - AZHeat 20:08:51 01/13/08 good points Nixit (n/m) - nzryan 21:05:20 01/13/08 not really - aliaZ 18:46:41 01/13/08 all might full race wouldnt use improper material - Antonio(AZ) 23:47:56 01/13/08 but I thought you said... - aliaZ 08:23:34 01/14/08 agreed. tubular mani's are just gonna crack. - nemo1080 16:02:48 01/14/08 Unless it is tubular cast then they would be - AZHeat 20:52:14 01/14/08 right - aliaZ 21:41:39 01/14/08 No welder needed, they are cast in a foundry. (n/m) - AZHeat 22:51:56 01/14/08 wow I had no idea cast iron was cast in a foundry (n/m) - aliaZ 07:39:53 01/15/08 And you are suppose to be an engineer? (n/m) - AZHeat 18:37:35 01/15/08 My apologies. - aliaZ 21:10:20 01/15/08 My BS meter just pegged. (n/m) - RSR 19:06:38 01/13/08 What material, thickness etc etc are you going to use? (n/m) - 550HPTT 17:29:57 01/13/08 Plate too? and Rod? And Temper? And Gas? - ni[X]it 18:30:16 01/13/08 My GReddy cracked every where possible. (n/m) - Carp (Show & Go) 19:25:04 01/13/08 so it cracked even on a unmachined/unwelded area? (n/m) - nzryan 21:06:27 01/13/08
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