thermal expansion questions
Turbo Mini Forums

thinking about how im going to make the main mount for my turbo, and how much movement do you have to take acount for with thermal expansion. is it a case of a few thou or a few mm etc. anyway this is what im thinking of doing:



obviously more than 1 bobbin and a bit heftier braketry but this sort of idea, is this ok or will i need something more solid.

what have you lot done?

would ya need a rubber? is that not mounted to the engine anyway?

yes it is but its not to stop the engine pulling from the body its to allow for the expansion from the heat of the turbo and in theory stop the manifold cracking, im just not sure how far to go with it.

I'd ditch the rubber bit and just bolt it together,

I'm thinking that with the rubber there will be movement and the manifold will crack from the weight of the turbo,

with it bolted solid I think the turbo will be supported well buy the vertical bracket, but the bracket will flex sideways to allow for themal expansion of the exhaust manifold.

I'm going to use a double rose-jointed arm, like an adjustable engine steady, in the vertical plane so that it will take the weight but allow movement side-to-side or front-to-back.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

ok so the trick is just to not make the braket too thick to "move a little" under pressure, needs a little give?

i like that idea paul, not too hard to fabricate and it would also look very trick. i think i may have to investigate that one further if you dont mind me copying. :)

Edited by Rick.SPI on 7th Feb, 2011.

You could use one of these:

http://cgi.ebay.co.uk/2-x-BRAND-NEW-6mm-ST...=item5188e5a439

If you want the spherical rod ends, then substitute those ends with a couple of these, one left hand and one right hand thread.

http://www.rodends.co.uk/pos6-53-p.asp

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

yes thats a good solution only problem is untill its all mocked up properly im not sure what height they need to be. ill have to finish mocking up and then get the bits, thinking i might get those ends and thread some bits of ally as then i can cut them to whatever they need to be?