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Re: [Healeys] Rear axle ratios

from [Chris Dimmock via Healeys] [Permanent Link][Original]
To: Jonathan Einhorn <einhornlawoffice@gmail.com>
Subject: Re: [Healeys] Rear axle ratios
From: Chris Dimmock via Healeys <healeys@autox.team.net>
Date: Wed, 6 Nov 2024 10:26:47 +1100
Cc: healey list <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <CADqHe-2TdRv3J-OU_Cx8oQWLpgmPa8xwz=-Y7Jfof-2zSQPMNg@mail.gmail.com> 
--===============7309463268436114226==
        charset=utf-8
Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">Rea=
listically available rear axle ratios are:</div><div dir=3D"ltr">4.1:1</div>=
<div dir=3D"ltr">3.9:1</div><div dir=3D"ltr">3.5:1</div><div dir=3D"ltr">A 3=
.5:1 gives the highest top speed.&nbsp;</div><div dir=3D"ltr">A 4.1:1 gives t=
he fastest acceleration.&nbsp;</div><div dir=3D"ltr">There are some other st=
ump pulling ratios available, and possibly some land speed salt flats ratios=
, but these are the 3 realistic options&nbsp;</div><div dir=3D"ltr">Best</di=
v><div dir=3D"ltr">Chris</div><div dir=3D"ltr"><br><blockquote type=3D"cite"=
>On 5 Nov 2024, at 4:51=E2=80=AFAM, Jonathan Einhorn &lt;einhornlawoffice@gm=
ail.com&gt; wrote:<br><br></blockquote></div><blockquote type=3D"cite"><div d=
ir=3D"ltr">=EF=BB=BF<div dir=3D"ltr">Thanks: that's great.<div><br></div><di=
v>jon</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gm=
ail_attr">On Mon, Nov 4, 2024 at 12:04=E2=80=AFPM Harold Manifold &lt;<a hre=
f=3D"mailto:manifold@telus.net";>manifold@telus.net</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-le=
ft:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Jonathan,<d=
iv><br></div><div>I wondered the same thing myself and created this table wh=
en restoring my car.</div><div><br></div><div><table border=3D"0" cellpaddin=
g=3D"0" cellspacing=3D"0" width=3D"535" style=3D"border-collapse:collapse;wi=
dth:401pt">

 <colgroup><col width=3D"151" style=3D"width:113pt">
 <col width=3D"64" span=3D"6" style=3D"width:48pt">
 </colgroup><tbody><tr height=3D"17" style=3D"height:12.75pt">
  <td height=3D"17" width=3D"151" style=3D"height:12.75pt;width:113pt;border=
:0.5pt solid windowtext;padding-top:1px;padding-right:1px;padding-left:1px;c=
olor:windowtext;font-size:10pt;font-family:Arial;vertical-align:bottom">Over=
drive
  Ratio</td>
  <td width=3D"64" style=3D"border-left:none;width:48pt;border-top:0.5pt sol=
id windowtext;border-right:0.5pt solid windowtext;border-bottom:0.5pt solid w=
indowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:windowtex=
t;font-size:10pt;font-family:Arial;vertical-align:bottom">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; 0.82
  </td>
  <td width=3D"64" style=3D"border-left:none;width:48pt;border-top:0.5pt sol=
id windowtext;border-right:0.5pt solid windowtext;border-bottom:0.5pt solid w=
indowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:windowtex=
t;font-size:10pt;font-family:Arial;vertical-align:bottom">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; 0.78
  </td>
  <td width=3D"64" style=3D"border-left:none;width:48pt;border-top:0.5pt sol=
id windowtext;border-right:0.5pt solid windowtext;border-bottom:0.5pt solid w=
indowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:windowtex=
t;font-size:10pt;font-family:Arial;vertical-align:bottom">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; 0.82
  </td>
  <td width=3D"64" style=3D"border-left:none;width:48pt;border-top:0.5pt sol=
id windowtext;border-right:0.5pt solid windowtext;border-bottom:0.5pt solid w=
indowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:windowtex=
t;font-size:10pt;font-family:Arial;vertical-align:bottom">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; 0.78
  </td>
  <td width=3D"64" style=3D"border-left:none;width:48pt;border-top:0.5pt sol=
id windowtext;border-right:0.5pt solid windowtext;border-bottom:0.5pt solid w=
indowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:windowtex=
t;font-size:10pt;font-family:Arial;vertical-align:bottom">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; 0.82
  </td>
  <td width=3D"64" style=3D"border-left:none;width:48pt;border-top:0.5pt sol=
id windowtext;border-right:0.5pt solid windowtext;border-bottom:0.5pt solid w=
indowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:windowtex=
t;font-size:10pt;font-family:Arial;vertical-align:bottom">&nbsp;&nbsp;&nbsp;=
&nbsp;&nbsp;&nbsp; 0.78
  </td>
 </tr>
 <tr height=3D"17" style=3D"height:12.75pt">
  <td height=3D"17" style=3D"height:12.75pt;border-top:none;border-right:0.5=
pt solid windowtext;border-bottom:0.5pt solid windowtext;border-left:0.5pt s=
olid windowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:win=
dowtext;font-size:10pt;font-family:Arial;vertical-align:bottom">Rear Axle
  Ratio</td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4.10 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4.10 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.91 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.91 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.55 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.55 </td>
 </tr>
 <tr height=3D"17" style=3D"height:12.75pt">
  <td height=3D"17" style=3D"height:12.75pt;border-top:none;border-right:0.5=
pt solid windowtext;border-bottom:0.5pt solid windowtext;border-left:0.5pt s=
olid windowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:win=
dowtext;font-size:10pt;font-family:Arial;vertical-align:bottom">Final Ratio<=
/td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.37 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.19 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.21 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3.04 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.91 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.76 </td>
 </tr>
 <tr height=3D"17" style=3D"height:12.75pt">
  <td height=3D"17" style=3D"height:12.75pt;border-top:none;border-right:0.5=
pt solid windowtext;border-bottom:0.5pt solid windowtext;border-left:0.5pt s=
olid windowtext;padding-top:1px;padding-right:1px;padding-left:1px;color:win=
dowtext;font-size:10pt;font-family:Arial;vertical-align:bottom">Engine RPM @=

  60 MPH</td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp; 2,624 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp; 2,484 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp; 2,502 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp; 2,368 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp; 2,269 </td>
  <td style=3D"border-top:none;border-left:none;border-right:0.5pt solid win=
dowtext;border-bottom:0.5pt solid windowtext;padding-top:1px;padding-right:1=
px;padding-left:1px;color:windowtext;font-size:10pt;font-family:Arial;vertic=
al-align:bottom">&nbsp;&nbsp;&nbsp;&nbsp; 2,148 </td>
 </tr>

</tbody></table><br></div><div>Just to further muddy the water there are two=
 OD ratios available in addition to the three rear axle ratios. I have the 0=
.78 / 3.55 combination and my Healey happily cruises&nbsp;at 60 in OD.</div>=
<div><br></div><div>Harold</div></div><br><div class=3D"gmail_quote"><div di=
r=3D"ltr" class=3D"gmail_attr">On Mon, Nov 4, 2024 at 8:35=E2=80=AFAM Jonath=
an Einhorn &lt;<a href=3D"mailto:einhornlawoffice@gmail.com"; target=3D"_blan=
k">einhornlawoffice@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"g=
mail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex"><div dir=3D"ltr">Can someone remind me of the var=
ious rear axle ratios&nbsp;available for the 3000 and the benefits of each?&=
nbsp;<div><br></div><div>Thanks</div><div>jon<br clear=3D"all"><div><br></di=
v><span class=3D"gmail_signature_prefix">-- </span><br><div dir=3D"ltr" clas=
s=3D"gmail_signature">Jonathan J. Einhorn, Esq.<br>Attorney &amp; Counselor a=
t Law<br>129 Whitney Avenue<br>New Haven, CT. 06510<br>tel: 203-777-3777<br>=
<a href=3D"mailto:einhornlawoffice@gmail.com"; target=3D"_blank">einhornlawof=
fice@gmail.com</a><br>fax: 203-782-1721<br>cell: 203-623-7373</div></div></d=
iv>
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</blockquote></div><br clear=3D"all"><div><br></div><span class=3D"gmail_sig=
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