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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>This related to portable jump starters and not batteries per se. I should have been more clear.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='color:windowtext'>From:</span></b><span style='color:windowtext'> Healeys [mailto:healeys-bounces@autox.team.net] <b>On Behalf Of </b>Bob Spidell<br><b>Sent:</b> Tuesday, May 15, 2018 7:30 AM<br><b>To:</b> healeys@autox.team.net<br><b>Subject:</b> Re: [Healeys] Cold Cranking Amps<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>There's several variables to consider:<span style='font-size:12.0pt'><o:p></o:p></span></p><p>- Later 6-cyl cars have the battery in the boot. That's a long cable run to the starter solenoid; the cables and terminals need to be in good nick. <o:p></o:p></p><p>- Ditto the starter. The field coils in starters build up resistance over time and, eventually, the starter won't crank as well, putting even more load on the battery. After a couple cranks, the field coils get warm and the resistance builds up and, of course, the battery's reserve gets depleted.<o:p></o:p></p><p>- The higher the compression in your engine, the harder it is to turn over.<o:p></o:p></p><p>- Thicker oil, like 20W-50 can bog an engine down a bit.<o:p></o:p></p><p>The more CCA you have, the more margin to start an engine, esp. on a cold day (that's why CCA is the nominal stat for batteries). My Healeys are harder to start after they've been sitting for more than a few days. The 500CCA number I gave was a SWAG; I haven't seen any full-size auto battery with less than that anyway. We got a battery for my dad's '65 Mustang 289 with 550CCA from Autozone; Costco didn't sell the size we needed. It cranks the V8 OK.<o:p></o:p></p><p>FWIW, when I rebuilt my BJ8's engine the (previously) satisfactory wet cell battery I had wouldn't even turn the engine over (later compression checks showed 180PSI +/- in all 6). I had the starter rebuilt and installed an 800CCA AGM battery. The starter actually startled me the first time I cranked it; it's nearly as fast as the geared starter in my Mustang.<o:p></o:p></p><p>TLDR; The more the better.<o:p></o:p></p><p>Bob<o:p></o:p></p><div><p class=MsoNormal>On 5/14/2018 10:12 PM, John Spaur wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>So... wise ones (and I mean that sincerely)<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>My current battery is an Intimidator rated at 775. Bob S. mentioned in a post about a minimum of 500.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>How many CCA’s should a battery have for a Healey engine?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>TIA<o:p></o:p></p><p class=MsoNormal>John Spaur<o:p></o:p></p><p class=MsoNormal>San Jose<o:p></o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></blockquote><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p></div></body></html>