1.0Supercars.nethttps://www.supercars.net/blogrich600338<blockquote class="wp-embedded-content" data-secret="OBA6sRvjtp"><a href="https://www.supercars.net/blog/1973-porsche-91730-spyder/">1973 Porsche 917/30 Spyder</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.supercars.net/blog/1973-porsche-91730-spyder/embed/#?secret=OBA6sRvjtp" width="600" height="338" title="“1973 Porsche 917/30 Spyder” — Supercars.net" data-secret="OBA6sRvjtp" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.supercars.net/blog/wp-includes/js/wp-embed.min.js /* ]]> */ </script> https://www.supercars.net/blog/wp-content/uploads/2016/04/1973_Porsche_91730Spyder1.jpg10247241973 Porsche 917/30 Spyder Rule changes for the World Championship of Makes eliminated the stunning Porsche 917 during the early 1970s allowing the factory to develop the car for the open-top Canadian-American (CanAm) Championship in North America. Teams from McLaren, Lola and Chaparral were attracted to the 200 mile Sprint races of the formula and the rule book permitted almost anything, including free engine displacement and the use of turbochargers. Porsche used its new-found skills with forced induction to attach […]