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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
hard valve seats
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<blockquote data-quote="oexing" data-source="post: 119583" data-attributes="member: 1493"><p>Certainly depends on size of head pocket: Say you got 50 mm pocket plus heat the head to min. 200 degrees C and calculate heat extension in this pocket to be able to drop the new ring at no hammer blows . Something around 0,20 mm shrink fit or a bit more. Too lazy to do the maths at the moment. It is 50 mm x 0,000024 x 180 (temp. rise to 200 ) .</p><p> The sintered seats are said to need less shrink fit, even no heat in alu heads - if you believe it . . ..</p><p></p><p> Vic</p></blockquote><p></p>
[QUOTE="oexing, post: 119583, member: 1493"] Certainly depends on size of head pocket: Say you got 50 mm pocket plus heat the head to min. 200 degrees C and calculate heat extension in this pocket to be able to drop the new ring at no hammer blows . Something around 0,20 mm shrink fit or a bit more. Too lazy to do the maths at the moment. It is 50 mm x 0,000024 x 180 (temp. rise to 200 ) . The sintered seats are said to need less shrink fit, even no heat in alu heads - if you believe it . . .. Vic [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
hard valve seats
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