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	<title>S21 Seven Tuned &#8211; RCRevolution.net</title>
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		<title>Sirio &#8211; S21 Seven Tuned</title>
		<link>https://www.rcrevolution.net/sirio-s21-seven-tuned/</link>
					<comments>https://www.rcrevolution.net/sirio-s21-seven-tuned/#respond</comments>
		
		<dc:creator><![CDATA[Gigi]]></dc:creator>
		<pubDate>Tue, 07 Jun 2011 20:00:00 +0000</pubDate>
				<category><![CDATA[Motori]]></category>
		<category><![CDATA[S21 Seven Tuned]]></category>
		<category><![CDATA[Sirio]]></category>
		<guid isPermaLink="false">https://www.rcrevolution.net/?p=1786</guid>

					<description><![CDATA[Tutto nero, ecco come si presenta il nuovo Sirio S21 Seven Tuned.Costruito utilizzando le più moderne tecnologie e materiali high tech, il nuovo Sirio S21 Seven Tuned è un motore top di gamma che si rivolge a chi cerca le [&#8230;]]]></description>
										<content:encoded><![CDATA[<p>Tutto nero, ecco come si presenta il nuovo Sirio S21 Seven Tuned.<br />Costruito utilizzando le più moderne tecnologie e materiali high tech, il nuovo Sirio S21 Seven Tuned è un motore top di gamma che si rivolge a chi cerca le alte prestazioni.<br />Tutto nero: nera è la generosa testa di raffreddamento anodizzata con numerosi fori di alleggerimento, piccole alette verticali sull&#8217;aletta alta e precise serigrafie bianche (sottotesta turbo); nero è il carter, costruito con particolare attenzione al calcolo del volume al fine di ottimizzare i consumi e lucidato nella zona travasi/scarico.<br />I cuscinetti sono di elevata qualità con l&#8217;anteriore a doppia schermatura in gomma e il posteriore ibrido acciaio-ceramica (Hybrid bearing technology) con sfere in ceramica abbinate ad anelli in acciaio 100Cr6 che garantiscono un&#8217;elevata vita media del cuscinetto e scorrevolezza ad alte temperature.<br />Inedito il cilindro a 7 luci di travaso più una di scarico a trapezio rovesciato, finemente lavorato e ottimizzato nei flussi tramite canalizzazioni.<br />Il pistone è ricavato da barra di alluminio ad alta resistenza e caricato in silicio, ha il cielo leggermente bombato in prossimità del punto di fiamma e ben tre segmenti frangifiamma sulla sommità del mantello. Abbinato alla configurazione del cilindro e alla specifica camera di combustione garantisce al motore elevate prestazioni con massima coppia ad ogni regime di rotazione.<br />L&#8217;albero motore, con diametro esterno di 14.2mm, è particolarmente robusto e sorprendentemente affidabile. Presente il riempimento in silicone rosso sulla gola di adduzione che permette di ridurre l&#8217;inerzia alla rotazione dell&#8217;albero stesso. La manovella, interamente trattata con riporto indurente, presenta una virgola lucidata.<br />La biella a doppia bronzina è ultraleggera, ultrasottile, resistente e affidabile, studiata per ridurre al minimo la resistenza aerodinamica.<br />Il carburatore è di ultima generazione, in alluminio/plastica, con venturi intercambiabile in alluminio, minimo a singola regolazione e vite battuta minimo tipo reverse, con la nuova boccola in materiale speciale resistente fino a 200°C che contribuisce efficacemente a contrastare l&#8217;eventuale fenomeno di vapor lock.<br />Il nuovo Sirio S21 Seven Tuned è disponibile in Kit Combo con scarico Sirio Formula Racing EFRA 2058 completo di collettore a quattro mollette, set di due venturi in alluminio anodizzati neri da 6,5 e 7mm oltre al 7,5mm di serie sul motore, nuova maglietta nera Sirio Made in Italy, nuovo cappellino nero e grigio Sirio dal design racing ed infine le immancabili decals Sirio. Il tutto in una pratica valigetta telata nera con chiusura a zip.</p>
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