<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<meta name="Generator" content="Microsoft Exchange Server">
<!-- converted from text --><style><!-- .EmailQuote { margin-left: 1pt; padding-left: 4pt; border-left: #800000 2px solid; } --></style>
</head>
<body>
<meta name="x_Generator" content="Microsoft Word 15 (filtered medium)">
<style>
<!--
p.x_MsoNormal, li.x_MsoNormal, div.x_MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif}
a:x_link, span.x_MsoHyperlink
{color:blue;
text-decoration:underline}
a:x_visited, span.x_MsoHyperlinkFollowed
{color:#954F72;
text-decoration:underline}
.x_MsoChpDefault
{}
div.x_WordSection1
{}
-->
</style>
<div lang="EN-US" link="blue" vlink="#954F72">
<div class="x_WordSection1">
<p class="x_MsoNormal">Gents,</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">I have not seen it mentioned in this discussion yet, but some electronic ignitions (all?) have a voltage floor that they simply will not operate under. This may not be a concern in the majority of our sprint length vintage races, but
if you are contemplating running an “enduro” length race it could very well be an issue.</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">With all the light and efficient options now available for alternators out there I just don’t see any downside at all in running one.</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Terry Stetler</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
Mail</a> for Windows 10</p>
<p class="x_MsoNormal"> </p>
<div style="border:none; border-top:solid #E1E1E1 1.0pt; padding:3.0pt 0in 0in 0in">
<p class="x_MsoNormal" style="border:none; padding:0in"><b>From: </b><a href="mailto:fot@autox.team.net">MadMarx via Fot</a><br>
<b>Sent: </b>Sunday, January 29, 2017 9:55 AM<br>
<b>To: </b><a href="mailto:tarch@bellsouth.net">'Richard Taylor'</a>; <a href="mailto:rocky@spitfire4.com">
'Rocky Entriken'</a>; <a href="mailto:levilevi@comcast.net">'Bud Rolofson'</a>; <a href="mailto:fot@autox.team.net">
fot@autox.team.net</a><br>
<b>Subject: </b>Re: [Fot] How much electrical power is needed for a 30 minute race.</p>
</div>
<p class="x_MsoNormal"> </p>
</div>
</div>
<font size="2"><span style="font-size:10pt;">
<div class="PlainText">For sure it does!<br>
I see it on laptimes if the charger fades during a race and I also had a<br>
dyno test on this issue.<br>
Especially on top end revs the lower voltage kicking down the power of the<br>
coil.<br>
<br>
Cheers<br>
Chris<br>
<br>
-----Ursprüngliche Nachricht-----<br>
Von: Richard Taylor [<a href="mailto:tarch@bellsouth.net">mailto:tarch@bellsouth.net</a>]
<br>
Gesendet: Sonntag, 29. Januar 2017 15:02<br>
An: 'MadMarx'; 'Rocky Entriken'; 'Bud Rolofson'<br>
Betreff: RE: [Fot] How much electrical power is needed for a 30 minute race.<br>
<br>
Does a 14V spark ignite a gas-charge bigger, faster, better than a 12V<br>
spark?<br>
<br>
<br>
<br>
<br>
-----Original Message-----<br>
From: Fot [<a href="mailto:fot-bounces@autox.team.net">mailto:fot-bounces@autox.team.net</a>] On Behalf Of MadMarx via Fot<br>
Sent: Sunday, January 29, 2017 4:51 AM<br>
To: 'Rocky Entriken'; 'Bud Rolofson'; fot@autox.team.net<br>
Subject: Re: [Fot] How much electrical power is needed for a 30 minute race.<br>
<br>
The main point is not so much, that a battery last 30 minutes.<br>
It is the electrical current, what is important.<br>
If you consume power from your battery, then the electrical system runs at<br>
12-11.5V.<br>
<br>
If your charger is in action your system runs on 13.5-14.5V.<br>
This means, the ignition output is a lot higher and the engine makes more<br>
power.<br>
<br>
Cheers<br>
Chris<br>
<br>
<br>
-----Ursprüngliche Nachricht-----<br>
Von: Fot [<a href="mailto:fot-bounces@autox.team.net">mailto:fot-bounces@autox.team.net</a>] Im Auftrag von Rocky Entriken<br>
via Fot<br>
Gesendet: Sonntag, 29. Januar 2017 06:55<br>
An: Bud Rolofson; FOT<br>
Betreff: Re: [Fot] How much electrical power is needed for a 30 minute race.<br>
<br>
I never bothered with the lightweight battery in my Spitfire (no<br>
generator/alternator) because I needed the ballast anyway, so I moved mine<br>
to the right side of the shelf behind the seat for better weight balance. In<br>
fact, I got a heavier marine battery for the extra storage. My car has<br>
electronic ignition, starter, two fuel pumps, tach, transponder, four brake<br>
lights (none of my other gauges are electric)<br>
<br>
That said, I found a fully charged battery would last me about a day and a<br>
half. So for a weekend I had two batteries and I'd change it out overnight. <br>
A two-day autocross weekend seemed to use it up more than a two-day race<br>
weekend.<br>
<br>
Actually, for a race weekend, one battery would probably last, but why take<br>
chances? Hitting the starter sucks the most juice and I sure didn't want it<br>
to fail to start just when I got the 2-minute warning for Sunday's race<br>
(it's done that)! OTOH I've found that once started it'll do the whole race<br>
with nearly no charge -- did that once when I had to get a push start off<br>
the grid. None of the other stuff including sparkplugs suck much juice.<br>
<br>
--Rocky Entriken<br>
<br>
-----Original Message-----<br>
From: Bud Rolofson via Fot<br>
Sent: Saturday, January 28, 2017 11:02 PM<br>
To: FOT<br>
Subject: [Fot] How much electrical power is needed for a 30 minute race.<br>
<br>
How much battery is needed to run a Spitfire for a 30 minute race without an<br>
alternator, in terms of amps, or current needed.<br>
<br>
I've been looking at lighter weight batteries like the Braile and don't have<br>
a good idea of what reserve capacity is needed. Is 35 minutes enough with a<br>
battery capacity of (C/20 rate): 21 amp/hr.<br>
<br>
Fuel pump, ignition, some Gage's, and LED brake lights are the biggest draws<br>
on the battery.<br>
<br>
Thanks for any suggestions.<br>
Bud<br>
<br>
Sent from my Commodore 64<br>
_______________________________________________<br>
fot@autox.team.net<br>
<br>
<a href="http://www.fot-racing.com">http://www.fot-racing.com</a><br>
<br>
Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>
Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a><br>
Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a><br>
Unsubscribe/Manage: <br>
<a href="http://autox.team.net/mailman/options/fot/rocky@spitfire4.com">http://autox.team.net/mailman/options/fot/rocky@spitfire4.com</a><br>
<br>
<br>
_______________________________________________<br>
fot@autox.team.net<br>
<br>
<a href="http://www.fot-racing.com">http://www.fot-racing.com</a><br>
<br>
Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>
Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a><br>
Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a><br>
Unsubscribe/Manage:<br>
<a href="http://autox.team.net/mailman/options/fot/tr4racing@googlemail.com">http://autox.team.net/mailman/options/fot/tr4racing@googlemail.com</a><br>
<br>
<br>
_______________________________________________<br>
fot@autox.team.net<br>
<br>
<a href="http://www.fot-racing.com">http://www.fot-racing.com</a><br>
<br>
Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>
Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a><br>
Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a><br>
Unsubscribe/Manage:<br>
<a href="http://autox.team.net/mailman/options/fot/tarch@bellsouth.net">http://autox.team.net/mailman/options/fot/tarch@bellsouth.net</a><br>
<br>
<br>
_______________________________________________<br>
fot@autox.team.net<br>
<br>
<a href="http://www.fot-racing.com">http://www.fot-racing.com</a><br>
<br>
Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><br>
Archive: <a href="http://www.team.net/archive">http://www.team.net/archive</a><br>
Forums: <a href="http://www.team.net/forums">http://www.team.net/forums</a><br>
Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/fot/tlizzard@msn.com">
http://autox.team.net/mailman/options/fot/tlizzard@msn.com</a><br>
<br>
<br>
</div>
</span></font>
</body>
</html>