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Scott,
It is proportional to battery size. Amp-hours (A-H) is the easiest rating t=
o work with: divide that by Amps consumption to approximate the hours to ru=
n 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 o=
f 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.
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 t=
o measure it some time at the track.
Gary Schneider
=20
From: "Barr, Scott" <sbarr@McCarty-Law.com>
To: ''Friends of Triumph' Triumph' <fot@autox.team.net>=20
Sent: Saturday, June 4, 2016 1:56 PM
Subject: [Fot] (no subject)
=20
So how long should a car run on the battery without the alternator charging=
it?=C2=A0 No lights, just the computer, fuel pump, etc.
Yes, this is not my Spit, this is my Spec Racer Ford - so, basically, a '93=
Ford Escort.
Longer than 2 hours?
Scott B.
Scott Barr
McCarty Law LLP
(920) 257-2233
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
lobal.net
=20
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<html><head></head><body><div style=3D"color:#000; background-color:#fff; f=
ont-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, =
sans-serif;font-size:16px"><div id=3D"yui_3_16_0_ym19_1_1465080562178_6979"=
>Scott,<br></div><div dir=3D"ltr" id=3D"yui_3_16_0_ym19_1_1465080562178_706=
0">It is proportional to battery size. Amp-hours (A-H) is the easiest ratin=
g to work with: divide that by Amps consumption to approximate the hours to=
run completely down. It's actually a pretty rough approximation because th=
e A-H rating is typically measured over a 20-hour cycle and batteries are m=
uch less efficient over a few hour discharge. Then roughly halve that numbe=
r of hours to account for the faster discharge and to be a little conservat=
ive. Small batteries like in Gretchen's Mini are around 12 AH, Pegasus says=
an SRF spec battery is 33 AH.</div><div id=3D"yui_3_16_0_ym19_1_1465080562=
178_7182"><br></div><div id=3D"yui_3_16_0_ym19_1_1465080562178_7041">Your i=
gnition 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 meas=
ure it some time at the track.<br></div><div id=3D"yui_3_16_0_ym19_1_146508=
0562178_7427"><br></div><div id=3D"yui_3_16_0_ym19_1_1465080562178_7443">Ga=
ry Schneider<br></div><div id=3D"yui_3_16_0_ym19_1_1465080562178_6947"><spa=
n></span></div><div id=3D"yui_3_16_0_ym19_1_1465080562178_7042" class=3D"qt=
dSeparateBR"><br><br></div><div style=3D"display: block;" id=3D"yui_3_16_0_=
ym19_1_1465080562178_7094" class=3D"yahoo_quoted"> <blockquote id=3D"yui_3_=
16_0_ym19_1_1465080562178_7093" style=3D"border-left: 2px solid rgb(16, 16,=
255); margin-left: 5px; margin-top: 5px; padding-left: 5px;"> <div id=3D"y=
ui_3_16_0_ym19_1_1465080562178_7092" style=3D"font-family: HelveticaNeue, H=
elvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px=
;"> <div id=3D"yui_3_16_0_ym19_1_1465080562178_7091" style=3D"font-family: =
HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;=
font-size: 16px;"> <div id=3D"yui_3_16_0_ym19_1_1465080562178_7090" dir=3D=
"ltr"> <font id=3D"yui_3_16_0_ym19_1_1465080562178_7365" face=3D"Arial" siz=
e=3D"2"> <hr id=3D"yui_3_16_0_ym19_1_1465080562178_7366" size=3D"1"> <b id=
=3D"yui_3_16_0_ym19_1_1465080562178_7501"><span id=3D"yui_3_16_0_ym19_1_146=
5080562178_7500" style=3D"font-weight:bold;">From:</span></b> "Barr, Scott"=
<sbarr@McCarty-Law.com><br> <b id=3D"yui_3_16_0_ym19_1_1465080562178=
_7503"><span id=3D"yui_3_16_0_ym19_1_1465080562178_7502" style=3D"font-weig=
ht: bold;">To:</span></b> ''Friends of Triumph' Triumph' <fot@autox.team=
.net> <br> <b id=3D"yui_3_16_0_ym19_1_1465080562178_7364"><span id=3D"yu=
i_3_16_0_ym19_1_1465080562178_7363" style=3D"font-weight: bold;">Sent:</spa=
n></b> Saturday, June 4, 2016 1:56 PM<br> <b id=3D"yui_3_16_0_ym19_1_146508=
0562178_7505"><span id=3D"yui_3_16_0_ym19_1_1465080562178_7504" style=3D"fo=
nt-weight: bold;">Subject:</span></b> [Fot] (no subject)<br> </font> </div>=
<div id=3D"yui_3_16_0_ym19_1_1465080562178_7095" class=3D"y_msg_container"=
><br>So how long should a car run on the battery without the alternator cha=
rging it? No lights, just the computer, fuel pump, etc.<br><br>Yes, t=
his 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<b=
r>McCarty Law LLP<br>(920) 257-2233<br>____________________________________=
___________<br><a ymailto=3D"mailto:fot@autox.team.net"; href=3D"mailto:fot@=
autox.team.net">fot@autox.team.net</a><br><br><a href=3D"http://www.fot-rac=
ing.com/" target=3D"_blank">http://www.fot-racing.com</a><br><br>Donate: <a=
href=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.team=
.net/donate.html</a><br>Archive: <a href=3D"http://www.team.net/archive"; ta=
rget=3D"_blank">http://www.team.net/archive</a><br>Forums: <a href=3D"http:=
//www.team.net/forums" target=3D"_blank">http://www.team.net/forums</a><br>=
rygret@sbcglobal.net" target=3D"_blank">http://autox.team.net/mailman/optio=
ns/fot/garygret@sbcglobal.net</a><br><br><br><br><br></div> </div> </div> <=
/blockquote> </div></div></body></html>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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