My SS Autochrome mani. CRACKED! - PICS
multipersonality disorder
Joined: Feb 2002
Posts: 5,656
Likes: 0
From: so. cal
Originally Posted by RETed
Sure, I'll say it.
Both the HKS and GReddy (at least spell it right) designs SUCK.
Wastegate ports are not placed efficiently, and the designs are made more to just fit the compact engine bay of the FC / FD.
When you need to build things right, make one yourself!
-Ted
Both the HKS and GReddy (at least spell it right) designs SUCK.
Wastegate ports are not placed efficiently, and the designs are made more to just fit the compact engine bay of the FC / FD.
When you need to build things right, make one yourself!
-Ted
development
Joined: Aug 2002
Posts: 5,714
Likes: 7
From: Lafayette, LA
Originally Posted by t-von
Turbo timers are a waste of money.
To coolant jackets, a TT in this application is worth its weight in platnium
Do you feel lucky punk!!!
Joined: Oct 2005
Posts: 356
Likes: 0
From: Puerto Rico
the exhaust looks like the engine have a lean condition. Also a very hot metal that make contac with cool water will crack because his expansion properties are reduced. If you look close to the crack, there is no metal composition problem. The welding is not a problem. The metal no crack in any normal circunstances. The only reason for that crack is the one that I said, a very hot stainless steel that make contact with cool liquid.
Senior Member
Joined: Oct 2002
Posts: 685
Likes: 1
From: Portland, OR
Originally Posted by Nitrometano
The only reason for that crack is the one that I said, a very hot stainless steel that make contact with cool liquid.
The truth is anytime a material is heated (steel, wood, playdough, etc...) it strains. That is it changes in dimension. If this change is dimension is in any way restricted then stresses are created. These stresses are then what causes the material to fail. These stress my not even be that large, but if repeated then the material could still fail. This is called fatigue.
Geometric discontinuities (micro and macro) cause stress concentrations. A fillet, weld, hole and small material void are all examples of stress concentrations.
Justin
I've worked with a few of these POS SS autocrome headers, they are made with Chinese uncertified steel products.. most of them have FAR too much carbon in them. which when heated/welded/modified in anyway will create a very very fragile metal. Even if you preheat then weld thier is still too many impurities in the metal from China to be worth $10 they are actualy worth. One thing that would help this header would be a divided flange to allow for expansion. but that's just like giving water to a dying man.. bit of a waste of time..
But with SO many people here and on jsut about every other fourm on the internet.. why are you actually surprized it cracked??
But with SO many people here and on jsut about every other fourm on the internet.. why are you actually surprized it cracked??
Originally Posted by Kahren
it has nothing to do with ss autochrome, most stainelss manifolds will crack, if you look up properties for SS you will see why its not the best thign to make manifolds out of. its got a high coeefficient of thermal expansion and its not very elastic. so when it gets hot its easier to crack. but either way that sucks 
Originally Posted by dubulup
I'll be using a turbo timer to keep the main (E-01, Motec, cluster) toggle switch active for 3-5min after shut down to keep an electric pump and radiator fans running after power has been cut from the ECU.
To coolant jackets, a TT in this application is worth its weight in platnium
To coolant jackets, a TT in this application is worth its weight in platnium
For their original design intent they are useless however, they are usefull in other specialized applications.
Thread Starter
GhostSS
Joined: May 2005
Posts: 281
Likes: 0
From: Phoenix, AZ
Forum member 1Revvin7. Hes got a whole bunch of pictures here
http://www.nopistons.com/forums/inde...album&album=42
I can't wait to get back on the dyno.
http://www.nopistons.com/forums/inde...album&album=42
I can't wait to get back on the dyno.
Fabrineer
Joined: Oct 2002
Posts: 976
Likes: 1
From: Charlotte, NC
I've got a manifold for you. It's braced so you don't have the substantial weight of the turbo resting on the hot (and more maleable) manifold. It costs a little more to make, somewhere around $600, but it's well worth it.
BOOSTED Vert
Joined: Sep 2002
Posts: 2,307
Likes: 0
From: Miami
Originally Posted by shm21284
I've got a manifold for you. It's braced so you don't have the substantial weight of the turbo resting on the hot (and more maleable) manifold. It costs a little more to make, somewhere around $600, but it's well worth it.
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