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Re: [Fot] TR6 Harmonic Dampener

To: "fot@autox.team.net" <fot@autox.team.net>, Robert Lang <robertlangtr6@yahoo.com>
Subject: Re: [Fot] TR6 Harmonic Dampener
From: Erik Jacobsen via Fot <fot@autox.team.net>
Date: Wed, 24 Sep 2025 13:34:19 +0000 (UTC)
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <1533351811.185448.1758718605121.ref@mail.yahoo.com> <1533351811.185448.1758718605121@mail.yahoo.com>
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 Bob,We notched the crossmember in my wife's 6 race car, as we were concerned 
about engine movement with stock type mounts as well. I just sectioned about 
1/2" of the tube and welded a piece of 1/8" strap across the opening. I don't 
have a pic handy, but if you need one, let me know and I'll send one this 
evening.
Jake
    On Wednesday, September 24, 2025 at 08:00:14 AM CDT, Robert Lang via Fot 
<fot@autox.team.net> wrote:  
 
 Hi,
After I got my frame straightened last year, I've noticed that the clearance 
between the ATI harmonic dampener and the front cross member and the steering 
rack seems tighter than what I previously had. Granted how much metal had been 
bent in the crash, I'm not surprised.
So, I have a question for the hive - to compensate, I plan to push the engine 
back a tad, maybe 1/4" or so using the "usual method" of installing a metal 
plate in the engine mount to frame interface. The question: in moving the 
engine back in small increments, will I have to "shorten" the driveshaft or is 
the driveshaft length (stock driveshaft and stock 4-speed TR6 transmission) 
already able to compensate for moving the engine back.
I'm not planning to go wild and make the car "mid-engined". I'm just looking to 
compensate for some "rearranged metal" in the front of the car. That and I also 
had to switch back to "stock" rubber motor mounts as opposed to the HD units 
that TRF used to sell. Else, if there's a source for stiffer stock-type TR6 
engine mounts, I'm all ears. The softer stock units allow a LOT of motion in 
both axis of motion.
After two broken cranks this season and reviewing my in-car vids, it looks like 
I'm not abusing the self-imposed redline of 6000 except occasional hell-toe 
blips on downshifts (Hi Christian!!) that I need to smooth out. But I think the 
crank is hitting the frame while spinning and that's adding more stress to the 
snout of the crank.
TIA
Bob Lang339 927 4489_______________________________________________
fot@autox.team.net

http://www.fot-racing.com

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot


  
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<html><head></head><body><div class=3D"ydpc1ec1fddyahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px=
;"><div></div>
        <div dir=3D"ltr" data-setdir=3D"false">Bob,</div><div dir=3D"ltr" d=
ata-setdir=3D"false">We notched the crossmember in my wife's 6 race car, as=
 we were concerned about engine movement with stock type mounts as well. I =
just sectioned about 1/2" of the tube and welded a piece of 1/8" strap acro=
ss the opening. I don't have a pic handy, but if you need one, let me know =
and I'll send one this evening.</div><div dir=3D"ltr" data-setdir=3D"false"=
><br></div><div dir=3D"ltr" data-setdir=3D"false">Jake</div><div><br></div>
       =20
        </div><div id=3D"ydp9723d386yahoo_quoted_9190763401" class=3D"ydp97=
23d386yahoo_quoted">
            <div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
               =20
                <div>
                        On Wednesday, September 24, 2025 at 08:00:14 AM CDT=
, Robert Lang via Fot &lt;fot@autox.team.net&gt; wrote:
                    </div>
                    <div><br></div>
                    <div><br></div>
               =20
               =20
                <div><div id=3D"ydp9723d386yiv9966904260"><div><div style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;" class=3D"ydp9723d386yiv9966904260yahoo-style-wrap"><div dir=3D"ltr">Hi,<=
/div><div dir=3D"ltr"><br></div><div dir=3D"ltr">After I got my frame strai=
ghtened last year, I've noticed that the clearance between the ATI harmonic=
 dampener and the front cross member and the steering rack seems tighter th=
an what I previously had. Granted how much metal had been bent in the crash=
, I'm not surprised.</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">So, I=
 have a question for the hive - to compensate, I plan to push the engine ba=
ck a tad, maybe 1/4" or so using the "usual method" of installing a metal p=
late in the engine mount to frame interface. The question: in moving the en=
gine back in small increments, will I have to "shorten" the driveshaft or i=
s the driveshaft length (stock driveshaft and stock 4-speed TR6 transmissio=
n) already able to compensate for moving the engine back.</div><div dir=3D"=
ltr"><br></div><div dir=3D"ltr">I'm not planning to go wild and make the ca=
r "mid-engined". I'm just looking to compensate for some "rearranged metal"=
 in the front of the car. That and I also had to switch back to "stock" rub=
ber motor mounts as opposed to the HD units that TRF used to sell. Else, if=
 there's a source for stiffer stock-type TR6 engine mounts, I'm all ears. T=
he softer stock units allow a LOT of motion in both axis of motion.</div><d=
iv dir=3D"ltr"><br></div><div dir=3D"ltr">After two broken cranks this seas=
on and reviewing my in-car vids, it looks like I'm not abusing the self-imp=
osed redline of 6000 except occasional hell-toe blips on downshifts (Hi Chr=
istian!!) that I need to smooth out. But I think the crank is hitting the f=
rame while spinning and that's adding more stress to the snout of the crank=
.</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">TIA</div><div dir=3D"ltr=
"><br></div><div dir=3D"ltr">Bob Lang</div><div dir=3D"ltr">339 927 4489</d=
iv></div></div></div>_______________________________________________<br><a =
href=3D"mailto:fot@autox.team.net"; rel=3D"nofollow" target=3D"_blank">fot@a=
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_______________________________________________
fot@autox.team.net

http://www.fot-racing.com

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot



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