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Yes, they are the ebay rods. I saw some e-mail traffic that they don't
clear the cylinder liners at the bottom when rotated.
On Wed, Jul 22, 2015 at 8:05 PM, Brad Eells <tr4abrad@gmail.com> wrote:
> Are these the Ebay rods that have been discussed?
>
>
> http://www.ebay.com/itm/Connecting-Rods-for-Triumph-TR3-TR4-Forged-Conrods-Con-Rod-158-75mm-ARP-Bolts-/131562025540?hash=item1ea1b53244&vxp=mtr
>
> Any thoughts? The price is certainly attractive...
>
>
> Brad
>
> On Tue, Jul 21, 2015 at 12:24 PM, MadMarx <tr4racing@googlemail.com>
> wrote:
>
>> Hi Guys,
>>
>>
>>
>> After my engine blow at the last race and a rod in two pieces I
>> investigated about rod design.
>>
>>
>>
>> In US forums I found an interesting opinion:
>>
>>
>>
>> H-beam rods are for low rev high torque engine (turbo, compressor)
>>
>> I-beam are for medium torque engines with high revs
>>
>>
>>
>> As engineer I agree with this statement. On high revs the rod shaft gets
>> bended back and forth by the inertia caused by the rotation.
>>
>> I could imagine that the sharp sides of the H-beam rod will create a
>> crack after a while because the stiffness for bending along the rotation
>> axis smaller than with an I-beam rod.
>>
>> That means to me that the fatigue resistance is smaller on an H-beam rod
>> at high revs.
>>
>> With high revs on a long stroke engine I mean 6000+.
>>
>>
>>
>> The manufacturer of the broken H-beam rod was Scat.
>>
>>
>>
>> I think next time I order an I-beam rod from Scat.
>>
>>
>>
>> What do you think?
>>
>>
>>
>> Cheers
>>
>> Chris
>>
>> _______________________________________________
>> fot@autox.team.net
>>
>> http://www.fot-racing.com
>>
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage:
>> http://autox.team.net/mailman/options/fot/tr4abrad@gmail.com
>>
>>
>>
>>
>
>
> --
> *Brad Eells*
> *Friends of Triumph*
>
> *http://www.fot-racing.com/ <http://www.fot-racing.com/>*
>
>
>
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
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> Unsubscribe/Manage:
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>
>
>
>
--047d7bdc11bc83b9cc051b8a1ba1
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">Yes=
, they are the ebay rods. I saw some e-mail traffic that they don't cle=
ar the cylinder liners at the bottom when rotated.</div><div class=3D"gmail=
_extra"><br><div class=3D"gmail_quote">On Wed, Jul 22, 2015 at 8:05 PM, Bra=
d Eells <span dir=3D"ltr"><<a href=3D"mailto:tr4abrad@gmail.com"; target=
=3D"_blank">tr4abrad@gmail.com</a>></span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div dir=3D"ltr">Are these the Ebay rods that have been discu=
ssed?<div><br></div><div><a href=3D"http://www.ebay.com/itm/Connecting-Rods=
-for-Triumph-TR3-TR4-Forged-Conrods-Con-Rod-158-75mm-ARP-Bolts-/13156202554=
0?hash=3Ditem1ea1b53244&vxp=3Dmtr" target=3D"_blank">http://www.ebay.co=
m/itm/Connecting-Rods-for-Triumph-TR3-TR4-Forged-Conrods-Con-Rod-158-75mm-A=
RP-Bolts-/131562025540?hash=3Ditem1ea1b53244&vxp=3Dmtr</a><br></div><di=
v><br></div><div>Any thoughts? The price is certainly attractive...</div><d=
iv><br></div><div><br></div><div>Brad</div></div><div class=3D"gmail_extra"=
><br><div class=3D"gmail_quote"><div><div>On Tue, Jul 21, 2015 at 12:24 PM,=
MadMarx <span dir=3D"ltr"><<a href=3D"mailto:tr4racing@googlemail.com"; =
target=3D"_blank">tr4racing@googlemail.com</a>></span> wrote:<br></div><=
/div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex"><div><div><div lang=3D"DE" link=3D"blue=
" vlink=3D"purple"><div><div><p class=3D"MsoNormal"><span style=3D"font-siz=
e:10.0pt;font-family:"Verdana","sans-serif";color:#1f49=
7d">Hi Guys,<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"=
font-size:10.0pt;font-family:"Verdana","sans-serif";col=
or:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lan=
g=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verdana","=
;sans-serif";color:#1f497d">After my engine blow at the last race and =
a rod in two pieces I investigated about rod design.<u></u><u></u></span></=
p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;fon=
t-family:"Verdana","sans-serif";color:#1f497d"><u></u>=
=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=
=3D"font-size:10.0pt;font-family:"Verdana","sans-serif"=
;color:#1f497d">In US forums I found an interesting opinion:<u></u><u></u><=
/span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10=
.0pt;font-family:"Verdana","sans-serif";color:#1f497d">=
<u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" =
style=3D"font-size:10.0pt;font-family:"Verdana","sans-serif&=
quot;;color:#1f497d">H-beam rods are for low rev high torque engine (turbo,=
compressor)<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"E=
N-US" style=3D"font-size:10.0pt;font-family:"Verdana","sans-=
serif";color:#1f497d">I-beam are for medium torque engines with high r=
evs<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" sty=
le=3D"font-size:10.0pt;font-family:"Verdana","sans-serif&quo=
t;;color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><sp=
an lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verdana"=
,"sans-serif";color:#1f497d">As engineer I agree with this statem=
ent. On high revs the rod shaft gets bended back and forth by the inertia c=
aused by the rotation.<u></u><u></u></span></p><p class=3D"MsoNormal"><span=
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verdana",&=
quot;sans-serif";color:#1f497d">I could imagine that the sharp sides o=
f the H-beam rod will create a crack after a while because the stiffness fo=
r bending along the rotation axis smaller than with an I-beam rod.<u></u><u=
></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-s=
ize:10.0pt;font-family:"Verdana","sans-serif";color:#1f=
497d">That means to me that the fatigue resistance is smaller on an H-beam =
rod at high revs.<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=
=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verdana","=
sans-serif";color:#1f497d">With high revs on a long stroke engine I me=
an 6000+.<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN-U=
S" style=3D"font-size:10.0pt;font-family:"Verdana","sans-ser=
if";color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNorma=
l"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verdana=
","sans-serif";color:#1f497d">The manufacturer of the broken=
H-beam rod was Scat.<u></u><u></u></span></p><p class=3D"MsoNormal"><span =
lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verdana",&q=
uot;sans-serif";color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:&=
quot;Verdana","sans-serif";color:#1f497d">I think next time =
I order an I-beam rod from Scat.<u></u><u></u></span></p><p class=3D"MsoNor=
mal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verda=
na","sans-serif";color:#1f497d"><u></u>=C2=A0<u></u></span><=
/p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:"Verdana","sans-serif";color:#1f497d">What do=
you think?<u></u><u></u></span></p><p class=3D"MsoNormal"><span lang=3D"EN=
-US" style=3D"font-size:10.0pt;font-family:"Verdana","sans-s=
erif";color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNor=
mal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Verda=
na","sans-serif";color:#1f497d">Cheers<u></u><u></u></span><=
/p><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo=
nt-family:"Verdana","sans-serif";color:#1f497d">Chris<u=
></u><u></u></span></p></div></div></div><br></div></div>__________________=
_____________________________<br>
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/a><br>
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et=3D"_blank">http://www.team.net/donate.html</a><br>
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<br>
<br>
<br></blockquote></div><span><font color=3D"#888888"><br><br clear=3D"all">=
<div><br></div>-- <br><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div=
dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div><b>Brad Eells=
</b></div><div><b>Friends of Triumph</b></div><div><b><a href=3D"http://www=
.fot-racing.com/" target=3D"_blank">http://www.fot-racing.com/</a><br></b><=
/div><div><b><br></b></div><div><img src=3D"https://docs.google.com/uc?id=
=3D0B9vVTDWaFCqFYVNfS2ZBaHdmXzg&export=3Ddownload" width=3D"96" height=
=3D"71"><br></div><div><br></div></div></div></div></div></div></div></div>=
</div></div></div>
</font></span></div>
<br>_______________________________________________<br>
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/a><br>
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<br></blockquote></div><br></div></div>
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