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Originally Posted by IanH
Hi james,
A question for you, is the 240SX manual to Auto swap straight forward, no body or tunnels mods, just the obvious ??
Sorry didn't mean to stress you out.
Agreed the flywheel is machined, but the material is cast iron. I suspected this from the flywheels I looked at years ago, but called my local machine shop to be sure.
Your definition of annealing is very limited. I assure you we anneal material every day thats not Cold worked.
That is an example of annealing, not a definition of all annealing.
You can have a stressed material thats not been cold worked. Cast iron has this problem, hence my comment.
Your definition of steel is also very basic.
Steels that are heat treated are tool steels, and from memory the carbon range is different from mild steel. Guess you can look that up.
Cast iron is the common name for pig iron, as made by a blast furnace.
It is the starting point for ALL steels.
Yes it becomes a variety of steels with further treatment, including stainless steel.
You make it sound like a reject material !!!
So far I have not looked anything up, but I can and have access to PHD material scientist's here if you have a question you cant answer.
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Oh you're not stressing me out. I should have put a smiley in there.
I like learning about this stuff. If you have any insights I haven't learned in my class I would gladly learn it and don't mind being wrong about anything.
Yeah annealing is a stress relieving process... period. I'm just spitting out the definition I'm trying to remember for my final next week.
I don't know what the material is of the flywheel but I suspect that the heat spots on the flywheel have caused the material to harden in those spots. This makes the clutch clamp down on material that has different hardnesses so it creates the 'shivering' he's talking about... just my theory. And if its true and he can see blue on the back of the flywheel then no amount of machining wil change it.
Tool steel is name given to steels with special properties because of their content. Tool steels can be hardened but they are not defined by that characteristic.
You're right about the pig iron, but from what I gather, it really IS reject material. Going back the the flywheel, it may be cast from iron, but it probably isn't pig iron.
And for casting iron, it should not have any stress in it that needs annealing because in hot working there is dynamic recrystallization of the grain structure. Only in cold working is there deformation of the grain structure along the axis of cold working (creating anisotropic properties).
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As far as the 240 conversion... hmm... no idea because the auto on the 240 is computer controlled... There's some good writeups on Zilvia.net about it though.
End Hijack.
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