<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1465080562178_6979">Scott,<br></div><div dir="ltr" id="yui_3_16_0_ym19_1_1465080562178_7060">It is proportional to battery size. Amp-hours (A-H) is the easiest rating to work with: divide that by Amps consumption to approximate the hours to run completely down. It's actually a pretty rough approximation because the A-H rating is typically measured over a 20-hour cycle and batteries are much less efficient over a few hour discharge. Then roughly halve that number of hours to account for the faster discharge and to be a little conservative. Small batteries like in Gretchen's Mini are around 12 AH, Pegasus says an SRF spec battery is 33 AH.</div><div id="yui_3_16_0_ym19_1_1465080562178_7182"><br></div><div id="yui_3_16_0_ym19_1_1465080562178_7041">Your ignition and fueling at race speed probably need between 5 and 10 amps so a couple hours is in the ballpark. I have a current shunt if you want to measure it some time at the track.<br></div><div id="yui_3_16_0_ym19_1_1465080562178_7427"><br></div><div id="yui_3_16_0_ym19_1_1465080562178_7443">Gary Schneider<br></div><div id="yui_3_16_0_ym19_1_1465080562178_6947"><span></span></div><div id="yui_3_16_0_ym19_1_1465080562178_7042" class="qtdSeparateBR"><br><br></div><div style="display: block;" id="yui_3_16_0_ym19_1_1465080562178_7094" class="yahoo_quoted"> <blockquote id="yui_3_16_0_ym19_1_1465080562178_7093" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div id="yui_3_16_0_ym19_1_1465080562178_7092" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1465080562178_7091" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1465080562178_7090" dir="ltr"> <font id="yui_3_16_0_ym19_1_1465080562178_7365" face="Arial" size="2"> <hr id="yui_3_16_0_ym19_1_1465080562178_7366" size="1"> <b id="yui_3_16_0_ym19_1_1465080562178_7501"><span id="yui_3_16_0_ym19_1_1465080562178_7500" style="font-weight:bold;">From:</span></b> "Barr, Scott" <sbarr@McCarty-Law.com><br> <b id="yui_3_16_0_ym19_1_1465080562178_7503"><span id="yui_3_16_0_ym19_1_1465080562178_7502" style="font-weight: bold;">To:</span></b> ''Friends of Triumph' Triumph' <fot@autox.team.net> <br> <b id="yui_3_16_0_ym19_1_1465080562178_7364"><span id="yui_3_16_0_ym19_1_1465080562178_7363" style="font-weight: bold;">Sent:</span></b> Saturday, June 4, 2016 1:56 PM<br> <b id="yui_3_16_0_ym19_1_1465080562178_7505"><span id="yui_3_16_0_ym19_1_1465080562178_7504" style="font-weight: bold;">Subject:</span></b> [Fot] (no subject)<br> </font> </div> <div id="yui_3_16_0_ym19_1_1465080562178_7095" class="y_msg_container"><br>So how long should a car run on the battery without the alternator charging it? No lights, just the computer, fuel pump, etc.<br><br>Yes, this is not my Spit, this is my Spec Racer Ford - so, basically, a '93 Ford Escort.<br><br>Longer than 2 hours?<br><br>Scott B.<br><br><br>Scott Barr<br>McCarty Law LLP<br>(920) 257-2233<br>_______________________________________________<br><a ymailto="mailto:fot@autox.team.net" href="mailto:fot@autox.team.net">fot@autox.team.net</a><br><br><a href="http://www.fot-racing.com/" target="_blank">http://www.fot-racing.com</a><br><br>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a><br>Archive: <a href="http://www.team.net/archive" target="_blank">http://www.team.net/archive</a><br>Forums: <a href="http://www.team.net/forums" target="_blank">http://www.team.net/forums</a><br>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/garygret@sbcglobal.net" target="_blank">http://autox.team.net/mailman/options/fot/garygret@sbcglobal.net</a><br><br><br><br><br></div> </div> </div> </blockquote> </div></div></body></html>