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RE: Get them.
By Gerry Proctor - 02/07/2005 6:20:57 AM; IP 207.133.188.254
Jardine and Thorley make these 180-degree headers a while back but good luck finding them.

Just so you know, they're not really 180-degree headers. The crossover tubes were an effort to create the equal lengths within the confines of a restricted engine bay. You have to get to the GT-40 to get real 180-degree headers.

I'm sure you know but for those who don't, a 180-degree header is designed to direct exhaust gas pulses into a collector every 180-degrees. The theory is that this equal pulse sequence improves exhaust scavaging over a very narrow rpm range by using the exhaust energy from one exhaust event to assist the progression of the next. This redirected exhaust scavaging is done in concert with primary tube diameter and length tuning to achieve optimal(theoretically) exhaust flow. But, again, over a very narrow rpm range.
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Collapse <a href=../ForumFE/reply.aspx?ID=23940&Reply=23940><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor23940" onclick="return false;">180* headers: who makes em?</a>&nbsp;-- <font color=#0000ff>Roger, <i>02/05/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=23940', contentMargin: 60, icon: $('anchor23940') }); </script>  180* headers: who makes em? -- Roger, 02/05/2005
Collapse <a href=../ForumFE/reply.aspx?ID=23943&Reply=23940><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor23943" onclick="return false;">RE: Jardine, but don't know if you still can.n/m</a>&nbsp;-- <font color=#0000ff>Gerry Proctor, <i>02/05/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=23943', contentMargin: 60, icon: $('anchor23943') }); </script>  RE: Jardine, but don't know if you still can.n/m -- Gerry Proctor, 02/05/2005
Collapse <a href=../ForumFE/reply.aspx?ID=23957&Reply=23940><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor23957" onclick="return false;">RE: Jardine, but don't know if you still can.n/m</a>&nbsp;-- <font color=#0000ff>Roger, <i>02/06/2005</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=23957', contentMargin: 60, icon: $('anchor23957') }); </script>  RE: Jardine, but don't know if you still can.n/m -- Roger, 02/06/2005
RE: Get them. -- Gerry Proctor, 02/07/2005
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