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Author Topic: aluminium caliper piston question (2)  (Read 1069 times)

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Offline freggy

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aluminium caliper piston question (2)
« on: September 21, 2007, 06:56:13 AM »
does anyone know if there will be a heating problem of an aluminum caliper piston compared to a steel one?
I know expansion of aluminium is not the same as steel.
I don't think it will be a problem as the caliper housing is aluminium also but just to make sure...

Thanks
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Offline bert96

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Re: aluminium caliper piston question (2)
« Reply #1 on: September 21, 2007, 07:21:19 AM »

 Why would you use aluminum piston?
There are a guys on ebay who sell stainless pistons,IMHO i think they would be much more better...just my 02 cents  ;)
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Offline TwoTired

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Re: aluminium caliper piston question (2)
« Reply #2 on: September 21, 2007, 09:36:26 AM »
I agree, the expansion might be a problem when it gets hot...like under heavy breaking.  Aluminum would also transfer heat faster into the brake fluid, too!  You going to change to hi temp brake fluid, too?

Have you considered the phenolic ones available from Kevin Hunter on eBay?

Cheers,
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Offline bryanj

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Re: aluminium caliper piston question (2)
« Reply #3 on: September 22, 2007, 01:04:19 AM »
Alloy piston in alloy bore not a good idea cos of corrosion. Dissimilar metals do better
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Offline ieism

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Re: aluminium caliper piston question (2)
« Reply #4 on: September 22, 2007, 06:49:32 AM »
I have an aluminium piston in my 550 frontbrake, it works great. I drove halfway across Europe with it (mountain passes and everything) without a problem, so I have no problem recommending these. Overheating was not an issue.

I was sceptical at first too, but the guy I bought it from is a SOHC specialist and has sold a lot of them for years with no problem.
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