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	<lastBuildDate>Wed, 16 May 2012 14:07:55 +0000</lastBuildDate>
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		<title>Inforgraphic:  Hendrick Motorsports &#8211; 200 Wins by Driver</title>
		<link>http://www.buildingspeed.org/blog/2012/05/inforgraphic-hendrick-motorsports-200-wins-by-driver/</link>
		<comments>http://www.buildingspeed.org/blog/2012/05/inforgraphic-hendrick-motorsports-200-wins-by-driver/#comments</comments>
		<pubDate>Wed, 16 May 2012 12:41:56 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Brian Vickers]]></category>
		<category><![CDATA[Darrell Waltrip]]></category>
		<category><![CDATA[Geoff Bodine]]></category>
		<category><![CDATA[Jeff Gordon]]></category>
		<category><![CDATA[Jerry Nadeau]]></category>
		<category><![CDATA[Jimmie Johnson]]></category>
		<category><![CDATA[Joe Nemechek]]></category>
		<category><![CDATA[Ken Schrader]]></category>
		<category><![CDATA[Mark Martin]]></category>
		<category><![CDATA[Rick Hendrick]]></category>
		<category><![CDATA[Ricky Rudd]]></category>
		<category><![CDATA[Tim Richmond]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[Hendrick Motorsports]]></category>
		<category><![CDATA[nascar]]></category>
		<category><![CDATA[Pie Charts]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=798</guid>
		<description><![CDATA[Statistics Reported Without Comment]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/05/inforgraphic-hendrick-motorsports-200-wins-by-driver/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Engine Issues at Talladega: Vapor Lock, Gas Cans and Oil Coolers</title>
		<link>http://www.buildingspeed.org/blog/2012/05/engine-issues-at-talladega/</link>
		<comments>http://www.buildingspeed.org/blog/2012/05/engine-issues-at-talladega/#comments</comments>
		<pubDate>Mon, 07 May 2012 17:23:33 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Cooling]]></category>
		<category><![CDATA[Electronic Fuel Injection]]></category>
		<category><![CDATA[Engines]]></category>
		<category><![CDATA[NASCAR]]></category>
		<category><![CDATA[Oil]]></category>
		<category><![CDATA[radiators]]></category>
		<category><![CDATA[Talladega]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=783</guid>
		<description><![CDATA[An usual number of teams "ran out of gas" or had engine troubles during the Talladega race.   The TV analysts had some ready answers for what might have caused these problems.  Their extemporaneous theories tend to elicit sighs from engine builders, who know that problems can rarely be diagnosed at the track - and even more rarely by someone who hasn't looked at the car.

A wonderful aspect of blogging is that we're not called to have answers on the spot like the television broadcasters and we have the leisure of time.  Let's examine some of those theories.]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/05/engine-issues-at-talladega/feed/</wfw:commentRss>
		<slash:comments>7</slash:comments>
		</item>
		<item>
		<title>Plate Racing Rules:  Getting Ready for Talladega</title>
		<link>http://www.buildingspeed.org/blog/2012/05/plate-racing-rules-getting-ready-for-talladega/</link>
		<comments>http://www.buildingspeed.org/blog/2012/05/plate-racing-rules-getting-ready-for-talladega/#comments</comments>
		<pubDate>Thu, 03 May 2012 11:09:16 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Cooling]]></category>
		<category><![CDATA[Engines]]></category>
		<category><![CDATA[radiators]]></category>
		<category><![CDATA[Talladega]]></category>
		<category><![CDATA[bump drafting]]></category>
		<category><![CDATA[cooling]]></category>
		<category><![CDATA[engines]]></category>
		<category><![CDATA[nascar]]></category>
		<category><![CDATA[pop-off valves]]></category>
		<category><![CDATA[pressure]]></category>
		<category><![CDATA[radiator]]></category>
		<category><![CDATA[rules]]></category>
		<category><![CDATA[water]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=776</guid>
		<description><![CDATA[Most of the issues we were talking about at the start of the year regarding the measures NASCAR has taken to eliminate or reduce the two-car draft are still in play, so I thought I'd put the most important in one place as you start getting ready for Talladega this weekend.  ]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/05/plate-racing-rules-getting-ready-for-talladega/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Richmond Redux:  Relative Velocity</title>
		<link>http://www.buildingspeed.org/blog/2012/04/richmond-redux-relative-velocity/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/richmond-redux-relative-velocity/#comments</comments>
		<pubDate>Mon, 30 Apr 2012 13:45:01 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Edwards Carl]]></category>
		<category><![CDATA[NASCAR]]></category>
		<category><![CDATA[Racing]]></category>
		<category><![CDATA[Richmond]]></category>
		<category><![CDATA[Tony Stewart]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=762</guid>
		<description><![CDATA[NOTE: Some clarifications added 1:00 p.m. 4/30/12. Thanks to all the commenters, especially @nateryan! I think Dave Moody did a good job breaking things down. The situation is confounded because there were so many different complications. Who from NASCAR is duly authorized to tell a spotter/crew chief/driver their position? Is it the team&#8217;s responsibility to <a href='http://www.buildingspeed.org/blog/2012/04/richmond-redux-relative-velocity/' class='excerpt-more'>[...]</a>]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/richmond-redux-relative-velocity/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Is More Data Always Better?</title>
		<link>http://www.buildingspeed.org/blog/2012/04/is-more-data-always-better/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/is-more-data-always-better/#comments</comments>
		<pubDate>Sun, 29 Apr 2012 15:04:55 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Richmond]]></category>
		<category><![CDATA[Timing and Scoring]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=757</guid>
		<description><![CDATA[Saturday's race in Richmond was a festival of miscues.  Carl Edwards mistakenly thought he was leading, then he jumped the restart, although he wasn't the one to lead the restart because he wasn't the leader.  One would think we have the data that could prevent incidents like this.  We probably do.  But do we want to use it?]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/is-more-data-always-better/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Infographic:  Bristol: Old, New and Newer</title>
		<link>http://www.buildingspeed.org/blog/2012/04/infographic-bristol-old-new-and-newer/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/infographic-bristol-old-new-and-newer/#comments</comments>
		<pubDate>Fri, 27 Apr 2012 12:01:16 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Bristol Motor Speedway]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=753</guid>
		<description><![CDATA[In response to requests about how the &#8216;new new Bristol&#8217; compares with the &#8216;new Bristol&#8217; and the &#8216;old Bristol&#8217;, here&#8217;s a comparison.  For more on the changes, see my earlier post.  The light blue triangle shows the constant 36-degree banking of the &#8216;old Bristol&#8217;.  The black line shows the progressive banking (24-30 degrees) that was <a href='http://www.buildingspeed.org/blog/2012/04/infographic-bristol-old-new-and-newer/' class='excerpt-more'>[...]</a>]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/infographic-bristol-old-new-and-newer/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Kansas Wrap Up:  What Caused all the Engine Failures?</title>
		<link>http://www.buildingspeed.org/blog/2012/04/kansas-wrap-up-what-caused-all-the-engine-failures/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/kansas-wrap-up-what-caused-all-the-engine-failures/#comments</comments>
		<pubDate>Thu, 26 Apr 2012 13:18:00 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Andy Randolph]]></category>
		<category><![CDATA[Engines]]></category>
		<category><![CDATA[Kansas]]></category>
		<category><![CDATA[rear-end gear]]></category>
		<category><![CDATA[transmission]]></category>
		<category><![CDATA[engine]]></category>
		<category><![CDATA[engines]]></category>
		<category><![CDATA[Kansas Speedway]]></category>
		<category><![CDATA[nascar]]></category>
		<category><![CDATA[rear end gear]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=700</guid>
		<description><![CDATA[The defining characteristic of the Kansas race was the surprising number of engine problems.  Many of those problems can be attributed to the change in rear gear from a 3.89 to a 4.00.  At  190 mph at a track like Kansas, your wheels make 2270 revolutions per minute (rpm).  If you watch the telemetry on the television broadcast, you know that the engine is rotating around 9500-9900 rpm.  Since the engine is attached to the wheels, there has to be something to change the rotation rate between the engine and the gears.]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/kansas-wrap-up-what-caused-all-the-engine-failures/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
		</item>
		<item>
		<title>Bristol:  Banking vs. Distance</title>
		<link>http://www.buildingspeed.org/blog/2012/04/bristol-banking-vs-distance/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/bristol-banking-vs-distance/#comments</comments>
		<pubDate>Wed, 25 Apr 2012 15:52:58 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Bristol Motor Speedway]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=727</guid>
		<description><![CDATA[Bristol Motor Speedway announced that they are grinding down the upper groove of the track to decrease the progressive banking.  My (to-scale!) sketch of what I think they are doing from the press conference and the tweets (thank you so much Nate Ryan!) is below.  The 2007 re-do introduced progressive banking, with essentially three lanes.  <a href='http://www.buildingspeed.org/blog/2012/04/bristol-banking-vs-distance/' class='excerpt-more'>[...]</a>]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/bristol-banking-vs-distance/feed/</wfw:commentRss>
		<slash:comments>8</slash:comments>
		</item>
		<item>
		<title>Cautions: A Historical Downward Trend Over the Last Six Years</title>
		<link>http://www.buildingspeed.org/blog/2012/04/cautions-a-historical-downward-trend-over-the-last-six-years/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/cautions-a-historical-downward-trend-over-the-last-six-years/#comments</comments>
		<pubDate>Tue, 24 Apr 2012 15:59:47 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Cautions]]></category>
		<category><![CDATA[math]]></category>
		<category><![CDATA[NASCAR]]></category>
		<category><![CDATA[cautions]]></category>
		<category><![CDATA[linear regressions]]></category>
		<category><![CDATA[nascar]]></category>
		<category><![CDATA[statistics]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=722</guid>
		<description><![CDATA[Being the data geek that I am, I was really curious if the decreasing number of cautions was specific to this year.  It's not:  Cautions have been decreasing since 2005,as the graph below shows.  The squares are the cumulative number of cautions per 100 miles, obtained by adding up all the cautions in a season and dividing by the total number of miles in the races.  (This is a more accurate number than total cautions, given rainouts, shortening races and different venues from year to year.)]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/cautions-a-historical-downward-trend-over-the-last-six-years/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Kansas:  Temperature and Horsepower</title>
		<link>http://www.buildingspeed.org/blog/2012/04/temperature-and-horsepower/</link>
		<comments>http://www.buildingspeed.org/blog/2012/04/temperature-and-horsepower/#comments</comments>
		<pubDate>Mon, 23 Apr 2012 18:05:55 +0000</pubDate>
		<dc:creator>diandra</dc:creator>
				<category><![CDATA[Andy Randolph]]></category>
		<category><![CDATA[Electronic Fuel Injection]]></category>
		<category><![CDATA[Engines]]></category>
		<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.buildingspeed.org/blog/?p=701</guid>
		<description><![CDATA[There were a lot of engine problems at the Kansas race last Sunday &#8212; and a lot of theories as to why there were a lot of engine problems.  Let&#8217;s start with the cooler-than-expected temperatures on Sunday. When the air temperature changes, so does the number of air molecules heading into the engine.  Colder temperatures <a href='http://www.buildingspeed.org/blog/2012/04/temperature-and-horsepower/' class='excerpt-more'>[...]</a>]]></description>
		<wfw:commentRss>http://www.buildingspeed.org/blog/2012/04/temperature-and-horsepower/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
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