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Joshstix
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Toymods Vice President

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May 2002
Re: question on pistons Mon, 29 August 2005 02:24 Go to previous messageGo to previous message
Yes aftermarket pistons will come with a spec sheet that indicates the relevant bore measurements for skirt clearance.

Yes Arias do have a range of pistons with higher silicon content which makes them harder and reduces the thermal expansion rate. This means they can be run with less bore clearance when cold because they don't grow as much when hot. On the other hand "hard" is not really what you're looking for in a piston, it makes them more brittle and likely to crack.

Taking an 86mm bore as an example most forged pistons specify a 3.5 thou skirt clearance. My Arias pistons specified 2.5. All of the newer Arias pistons I have seen though specify 3.5 thou. They changed the design to be more like the other cheap forgies like JE etc.
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SubjectPosterDate
Read Message   question on pistons MX73_drifterSun, 28 August 2005 09:00
Read Message   Re: question on pistons mrshinSun, 28 August 2005 09:13
Read Message   Re: question on pistons YelloRollaSun, 28 August 2005 09:20
Read Message   Re: question on pistons MX73_drifterSun, 28 August 2005 09:21
Read Message   Re: question on pistons RWDboyMon, 29 August 2005 01:43
Read Message   Re: question on pistons  JoshstixMon, 29 August 2005 02:24
Read Message   Re: question on pistons RWDboyMon, 29 August 2005 02:35
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