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On live rear axle cars the engine and the rear axle want to twist in oppos=
ite directions and the reaction torque will exhibit itself at the point whe=
re the front and rear axle meat the ground.=C2=A0 In other words the wheels=
on opposite side at each end of the car will want to lift.
In IRS cars the return path for the reaction torque is through the frame an=
d the wheels are not part of the equation.=C2=A0=20
=20
Dave=20
=20
=20
-----Original Message-----
From: Sujit Roy <triumphstag@gmail.com>
To: David Brady <dmb993@earthlink.net>
Cc: Triumphs <triumphs@autox.team.net>
Sent: Wed, Mar 24, 2021 9:22 pm
Subject: Re: [TR] TR4A IRS Suspension Question
Can the engine rotation cause one side to lean more. I've heard that about =
Stags
On Wed, Mar 24, 2021, 7:14 PM David Brady <dmb993@earthlink.net> wrote:
When you figure this out, please let us know. I've had the same question ab=
out my TR250. In my case the steer and drive axles on the right hand side a=
re quarter inch or so higher than the left. Correct or not, I attribute thi=
s to these cars being setup as RHD and Triumph tweaking the right side slig=
htly higher to attribute for pilot weight. Of course, this doesn't help thi=
ngs on this side of the pond.
David Brady
'68 TR250
CD8124L
-----Original Message-----
>From: Jim Henningsen <trguy75@gmail.com>
>Sent: Mar 23, 2021 8:06 PM
>To: triumphs@autox.team.net
>Subject: [TR] TR4A IRS Suspension Question
>
>Ok, just finished redoing front and rear suspension on my 67 4A IRS.
>Complete disassembly, clean, repaint, new urethane bushings, tie rod ends,
>trunnions, etc.=C2=A0 New comp springs ( 1 inch lower) all corners, new st=
ock
>tubes shocks up front and new KYB gas shocks on the tube shock conversion
>brackets for the IRS.=C2=A0 Reinstalled all alignment shims as installed a=
s the
>car drove pretty straight.=C2=A0 Urethane packings on springs.=20
>
>After completing, I noticed that all four corners have a slightly differen=
t
>ride height when measured from garage floor to bottom on fender lip at
>center of each wheel.=C2=A0 Left front: 26 3/4 inches, Right front: 26 1/4=
, Left
>rear: 27 3/8, right rear: 27 7/8.=C2=A0 I think the higher rear height is =
coming
>from the tube shock conversion as it was lower with the levers.=C2=A0 =C2=
=A0 So about
>a half inch off each side.=C2=A0 =C2=A0I don't recall having this issue wh=
en I redid
>my TR6, but that was a while ago.=C2=A0 =C2=A0Rears also have stock traili=
ng arm
>brackets (one and two notch brackets on each side - believe these are
>original from new given history of the car).=C2=A0=20
>
>Looking for help on next steps before bringing it in for an alignment.=C2=
=A0 Will
>alignment correct height difference or do I need to add 1/2 inch spacers o=
n
>lower sides.=C2=A0 I am going to put uprated valved levers back on rear to
>eliminate the extra height in rear.=C2=A0=20
>
>Any help appreciated.=C2=A0 =C2=A0
>
>Thanks
>Jim Henningsen
>Ocala FL
>Too many TRs to maintain!
>61 3A
>62 4
>67 4A
>75 6
>81 8
>
>** triumphs@autox.team.net **
>
>Donate: http://www.team.net/donate.html
>Archive: http://www.team.net/pipermail/triumphs=C2=A0 http://www.team.net/=
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Archive: http://www.team.net/pipermail/triumphs=C2=A0 http://www.team.net/a=
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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">On live rear axle cars the engine and the rear axle want
to twist in opposite directions and the reaction torque will exhibit itself at
the point where the front and rear axle meat the ground. In other words
the wheels on opposite side at each end of the car will want to
lift.</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">In IRS cars the return path for the reaction torque is
through the frame and the wheels are not part of the equation. </font><br>
</div>
<div> <br>
</div>
<div style="clear:both"><font size="4">Dave </font><br>
<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font
size="2">-----Original Message-----<br>
From: Sujit Roy <triumphstag@gmail.com><br>
To: David Brady <dmb993@earthlink.net><br>
Cc: Triumphs <triumphs@autox.team.net><br>
Sent: Wed, Mar 24, 2021 9:22 pm<br>
Subject: Re: [TR] TR4A IRS Suspension Question<br>
<br>
<div id="yiv8933979127">
<div>
<div>Can the engine rotation cause one side to lean more. I've heard that about
Stags</div>
<br clear="none">
<div class="yiv8933979127gmail_quote">
<div class="yiv8933979127yqt5047684183" id="yiv8933979127yqtfd65166">
<div class="yiv8933979127gmail_attr" dir="ltr">On Wed, Mar 24, 2021, 7:14 PM
David Brady <<a rel="nofollow noopener noreferrer" shape="rect"
ymailto="mailto:dmb993@earthlink.net"; target="_blank"
href="mailto:dmb993@earthlink.net";>dmb993@earthlink.net</a>> wrote:<br
clear="none"></div>
</div>
<blockquote class="yiv8933979127gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="yiv8933979127yqt5047684183" id="yiv8933979127yqtfd95767">When you
figure this out, please let us know. I've had the same question about my TR250.
In my case the steer and drive axles on the right hand side are quarter inch or
so higher than the left. Correct or not, I attribute this to these cars being
setup as RHD and Triumph tweaking the right side slightly higher to attribute
for pilot weight. Of course, this doesn't help things on this side of the
pond.<br clear="none">
<br clear="none">
David Brady<br clear="none">
'68 TR250<br clear="none">
CD8124L<br clear="none">
<br clear="none">
-----Original Message-----<br clear="none">
>From: Jim Henningsen <<a rel="nofollow noopener noreferrer" shape="rect"
ymailto="mailto:trguy75@gmail.com"; target="_blank"
href="mailto:trguy75@gmail.com";>trguy75@gmail.com</a>><br clear="none">
>Sent: Mar 23, 2021 8:06 PM<br clear="none">
>To: <a rel="nofollow noopener noreferrer" shape="rect"
ymailto="mailto:triumphs@autox.team.net"; target="_blank"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a><br
clear="none">
>Subject: [TR] TR4A IRS Suspension Question<br clear="none">
><br clear="none">
>Ok, just finished redoing front and rear suspension on my 67 4A IRS.<br
clear="none">
>Complete disassembly, clean, repaint, new urethane bushings, tie rod
ends,<br clear="none">
>trunnions, etc. New comp springs ( 1 inch lower) all corners, new
stock<br clear="none">
>tubes shocks up front and new KYB gas shocks on the tube shock
conversion<br clear="none">
>brackets for the IRS. Reinstalled all alignment shims as installed as
the<br clear="none">
>car drove pretty straight. Urethane packings on springs. <br
clear="none">
><br clear="none">
>After completing, I noticed that all four corners have a slightly
different<br clear="none">
>ride height when measured from garage floor to bottom on fender lip at<br
clear="none">
>center of each wheel. Left front: 26 3/4 inches, Right front: 26 1/4,
Left<br clear="none">
>rear: 27 3/8, right rear: 27 7/8. I think the higher rear height is
coming<br clear="none">
>from the tube shock conversion as it was lower with the levers.
So about<br clear="none">
>a half inch off each side. I don't recall having this issue
when I redid<br clear="none">
>my TR6, but that was a while ago. Rears also have stock
trailing arm<br clear="none">
>brackets (one and two notch brackets on each side - believe these are<br
clear="none">
>original from new given history of the car). <br clear="none">
><br clear="none">
>Looking for help on next steps before bringing it in for an
alignment. Will<br clear="none">
>alignment correct height difference or do I need to add 1/2 inch spacers
on<br clear="none">
>lower sides. I am going to put uprated valved levers back on rear
to<br clear="none">
>eliminate the extra height in rear. <br clear="none">
><br clear="none">
>Any help appreciated. <br clear="none">
><br clear="none">
>Thanks<br clear="none">
>Jim Henningsen<br clear="none">
>Ocala FL<br clear="none">
>Too many TRs to maintain!<br clear="none">
>61 3A<br clear="none">
>62 4<br clear="none">
>67 4A<br clear="none">
>75 6<br clear="none">
>81 8<br clear="none">
><br clear="none">
>** <a rel="nofollow noopener noreferrer" shape="rect"
ymailto="mailto:triumphs@autox.team.net"; target="_blank"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **<br
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<div class="yiv8933979127yqt5047684183" id="yiv8933979127yqtfd89265"><br
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</div>
</blockquote></div>
<div class="yiv8933979127yqt5047684183" id="yiv8933979127yqtfd19698">
</div>
</div>
</div>
<div class="yqt5047684183" id="yqtfd79642">** <a shape="rect"
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href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **<br
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