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Re: [TR] TR4A IRS Suspension Question

To: Brian K <bk13@earthlink.net>
Subject: Re: [TR] TR4A IRS Suspension Question
From: James Henningsen <trguy75@gmail.com>
Date: Wed, 24 Mar 2021 14:25:38 -0400
Cc: Triumphs@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: Triumphs@autox.team.net
References: <021133b6-959a-42f4-bf13-8fb347de673c@email.android.com>
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Good idea.  Thanks.=20

> On Mar 24, 2021, at 1:48 PM, Brian K <bk13@earthlink.net> wrote:
>=20
> =EF=BB=BF
> Simple test on the rear shock conversion - disconnect one end of the shock=
 and slide it out of the way. Roll the car a little with the shock out of th=
e way then measure again. Don't drive this way.
>=20
> Like other replies, I would not expect the tube shocks to provide lift.
>=20
> Brian
>=20
> On Mar 24, 2021 4:37 AM, Jim Henningsen <trguy75@gmail.com> wrote:
> Great thoughts and much appreciated.  I believe the higher rear height is f=
rom the steel brackets used in the tube shock conversion kit, but I could be=
 wrong.   Let me drive it some more and get it loosened up and then measure a=
gain and also include measuring floor to frame on each corner.  I need to do=
 something as it doesn=E2=80=99t quite look right visually either and a TR h=
as to look right when it sits.  In my opinion.  Thanks
> Jim
>=20
> > On Mar 23, 2021, at 9:17 PM, Michael Marr <mmarr@albiontechnical.com> wr=
ote:
> >=20
> > =EF=BB=BFAnother thought.  On my TR3A, there is a spacer on one of the r=
ear springs that, effectively, increases the unloaded ride height on the dri=
ver's side to account for the fact that the car is driven driver-only most o=
f the time.  Does the same situation exist with the 4A?  Is one rear spring l=
onger than the other to provide the ride height difference?  Have you tried m=
easuring the ride height with someone (an adult, preferably) in the driver's=
 seat?
> >=20
> > Mike
> >=20
> > Michael J Marr, P.E., CEng.
> > Albion Technical Services
> > W5918 Hackbarth Rd
> > Fort Atkinson, WI 53538
> >=20
> > Cell:  630-202-0065
> > Email:  mmarr@albiontechnical.com
> >=20
> > -----Original Message-----
> > From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of Michael Ma=
rr
> > Sent: Tuesday, March 23, 2021 8:03 PM
> > To: Jim Henningsen <trguy75@gmail.com>; triumphs@autox.team.net
> > Subject: Re: [TR] TR4A IRS Suspension Question
> >=20
> > Have you driven the car?  A few road miles will help the suspension sett=
le.  There's a lot of "stiction" in those new components.
> >=20
> > Also, I agree with Jim Kirby - the new shocks will not affect ride heigh=
t, unless, for some reason, they have bottomed out and are bound up.
> >=20
> > Mike
> >=20
> > Michael J Marr, P.E., CEng.
> > Albion Technical Services
> > W5918 Hackbarth Rd
> > Fort Atkinson, WI 53538
> >=20
> > Cell:  630-202-0065
> > Email:  mmarr@albiontechnical.com
> >=20
> > -----Original Message-----
> > From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of Jim Hennin=
gsen
> > Sent: Tuesday, March 23, 2021 7:06 PM
> > To: triumphs@autox.team.net
> > Subject: [TR] TR4A IRS Suspension Question
> >=20
> > Ok, just finished redoing front and rear suspension on my 67 4A IRS.
> > Complete disassembly, clean, repaint, new urethane bushings, tie rod end=
s, trunnions, etc.  New comp springs ( 1 inch lower) all corners, new stock t=
ubes shocks up front and new KYB gas shocks on the tube shock conversion bra=
ckets for the IRS.  Reinstalled all alignment shims as installed as the car d=
rove pretty straight.  Urethane packings on springs.=20
> >=20
> > After completing, I noticed that all four corners have a slightly differ=
ent ride height when measured from garage floor to bottom on fender lip at c=
enter of each wheel.  Left front: 26 3/4 inches, Right front: 26 1/4, Left
> > rear: 27 3/8, right rear: 27 7/8.  I think the higher rear height is com=
ing
> > from the tube shock conversion as it was lower with the levers.    So ab=
out
> > a half inch off each side.   I don't recall having this issue when I red=
id
> > my TR6, but that was a while ago.   Rears also have stock trailing arm
> > brackets (one and two notch brackets on each side - believe these are or=
iginal from new given history of the car). =20
> >=20
> > Looking for help on next steps before bringing it in for an alignment.  W=
ill alignment correct height difference or do I need to add 1/2 inch spacers=
 on lower sides.  I am going to put uprated valved levers back on rear to el=
iminate the extra height in rear. =20
> >=20
> > Any help appreciated.  =20
> >=20
> > Thanks
> > Jim Henningsen
> > Ocala FL
> > Too many TRs to maintain!
> > 61 3A
> > 62 4
> > 67 4A
> > 75 6
> > 81 8
> >=20
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> >=20
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<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">Good idea. &nbsp;Thanks.&n=
bsp;</div><div dir=3D"ltr"><br><blockquote type=3D"cite">On Mar 24, 2021, at=
 1:48 PM, Brian K &lt;bk13@earthlink.net&gt; wrote:<br><br></blockquote></di=
v><blockquote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto">Simp=
le test on the rear shock conversion - disconnect one end of the shock and s=
lide it out of the way. Roll the car a little with the shock out of the way t=
hen measure again. Don't drive this way.<div dir=3D"auto"><br></div><div dir=
=3D"auto">Like other replies, I would not expect the tube shocks to provide l=
ift.<br><div dir=3D"auto"><br></div><div dir=3D"auto">Brian</div></div></div=
><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Mar 24, 2021 4=
:37 AM, Jim Henningsen &lt;trguy75@gmail.com&gt; wrote:<br type=3D"attributi=
on"><blockquote class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #=
ccc solid;padding-left:1ex"><p dir=3D"ltr">Great thoughts and much appreciat=
ed.&nbsp; I believe the higher rear height is from the steel brackets used i=
n the tube shock conversion kit, but I could be wrong.&nbsp;&nbsp; Let me dr=
ive it some more and get it loosened up and then measure again and also incl=
ude measuring floor to frame on each corner.&nbsp; I need to do something as=
 it doesn=E2=80=99t quite look right visually either and a TR has to look ri=
ght when it sits.&nbsp; In my opinion.&nbsp; Thanks<br>
Jim<br></p>
<p dir=3D"ltr">&gt; On Mar 23, 2021, at 9:17 PM, Michael Marr &lt;mmarr@albi=
ontechnical.com&gt; wrote:<br>
&gt; <br>
&gt; =EF=BB=BFAnother thought.&nbsp; On my TR3A, there is a spacer on one of=
 the rear springs that, effectively, increases the unloaded ride height on t=
he driver's side to account for the fact that the car is driven driver-only m=
ost of the time.&nbsp; Does the same situation exist with the 4A?&nbsp; Is o=
ne rear spring longer than the other to provide the ride height difference?&=
nbsp; Have you tried measuring the ride height with someone (an adult, prefe=
rably) in the driver's seat?<br>
&gt; <br>
&gt; Mike<br>
&gt; <br>
&gt; Michael J Marr, P.E., CEng.<br>
&gt; Albion Technical Services<br>
&gt; W5918 Hackbarth Rd<br>
&gt; Fort Atkinson, WI 53538<br>
&gt; <br>
&gt; Cell:&nbsp; 630-202-0065<br>
&gt; Email:&nbsp; mmarr@albiontechnical.com<br>
&gt; <br>
&gt; -----Original Message-----<br>
&gt; From: Triumphs &lt;triumphs-bounces@autox.team.net&gt; On Behalf Of Mic=
hael Marr<br>
&gt; Sent: Tuesday, March 23, 2021 8:03 PM<br>
&gt; To: Jim Henningsen &lt;trguy75@gmail.com&gt;; triumphs@autox.team.net<b=
r>
&gt; Subject: Re: [TR] TR4A IRS Suspension Question<br>
&gt; <br>
&gt; Have you driven the car?&nbsp; A few road miles will help the suspensio=
n settle.&nbsp; There's a lot of "stiction" in those new components.<br>
&gt; <br>
&gt; Also, I agree with Jim Kirby - the new shocks will not affect ride heig=
ht, unless, for some reason, they have bottomed out and are bound up.<br>
&gt; <br>
&gt; Mike<br>
&gt; <br>
&gt; Michael J Marr, P.E., CEng.<br>
&gt; Albion Technical Services<br>
&gt; W5918 Hackbarth Rd<br>
&gt; Fort Atkinson, WI 53538<br>
&gt; <br>
&gt; Cell:&nbsp; 630-202-0065<br>
&gt; Email:&nbsp; mmarr@albiontechnical.com<br>
&gt; <br>
&gt; -----Original Message-----<br>
&gt; From: Triumphs &lt;triumphs-bounces@autox.team.net&gt; On Behalf Of Jim=
 Henningsen<br>
&gt; Sent: Tuesday, March 23, 2021 7:06 PM<br>
&gt; To: triumphs@autox.team.net<br>
&gt; Subject: [TR] TR4A IRS Suspension Question<br>
&gt; <br>
&gt; Ok, just finished redoing front and rear suspension on my 67 4A IRS.<br=
>
&gt; Complete disassembly, clean, repaint, new urethane bushings, tie rod en=
ds, trunnions, etc.&nbsp; New comp springs ( 1 inch lower) all corners, new s=
tock tubes shocks up front and new KYB gas shocks on the tube shock conversi=
on brackets for the IRS.&nbsp; Reinstalled all alignment shims as installed a=
s the car drove pretty straight.&nbsp; Urethane packings on springs. <br>
&gt; <br>
&gt; After completing, I noticed that all four corners have a slightly diffe=
rent ride height when measured from garage floor to bottom on fender lip at c=
enter of each wheel.&nbsp; Left front: 26 3/4 inches, Right front: 26 1/4, L=
eft<br>
&gt; rear: 27 3/8, right rear: 27 7/8.&nbsp; I think the higher rear height i=
s coming<br>
&gt; from the tube shock conversion as it was lower with the levers.&nbsp;&n=
bsp;&nbsp; So about<br>
&gt; a half inch off each side.&nbsp;&nbsp; I don't recall having this issue=
 when I redid<br>
&gt; my TR6, but that was a while ago.&nbsp;&nbsp; Rears also have stock tra=
iling arm<br>
&gt; brackets (one and two notch brackets on each side - believe these are o=
riginal from new given history of the car).&nbsp; <br>
&gt; <br>
&gt; Looking for help on next steps before bringing it in for an alignment.&=
nbsp; Will alignment correct height difference or do I need to add 1/2 inch s=
pacers on lower sides.&nbsp; I am going to put uprated valved levers back on=
 rear to eliminate the extra height in rear.&nbsp; <br>
&gt; <br>
&gt; Any help appreciated.&nbsp;&nbsp; <br>
&gt; <br>
&gt; Thanks<br>
&gt; Jim Henningsen<br>
&gt; Ocala FL<br>
&gt; Too many TRs to maintain!<br>
&gt; 61 3A<br>
&gt; 62 4<br>
&gt; 67 4A<br>
&gt; 75 6<br>
&gt; 81 8<br>
&gt; <br>
&gt; ** triumphs@autox.team.net **<br>
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