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Those are the ones =E2=80=94 and we=E2=80=99ve discussed them here =
before. Some were skeptical but a couple of FoT=E2=80=99ers spoke up =
and said they=E2=80=99d used them and were happy with them.
Duncan
(Texas)
> On Jul 22, 2015, at 8:05 PM, Brad Eells <tr4abrad@gmail.com> wrote:
>=20
> Are these the Ebay rods that have been discussed?
>=20
> =
http://www.ebay.com/itm/Connecting-Rods-for-Triumph-TR3-TR4-Forged-Conrods=
-Con-Rod-158-75mm-ARP-Bolts-/131562025540?hash=3Ditem1ea1b53244&vxp=3Dmtr =
<http://www.ebay.com/itm/Connecting-Rods-for-Triumph-TR3-TR4-Forged-Conrod=
s-Con-Rod-158-75mm-ARP-Bolts-/131562025540?hash=3Ditem1ea1b53244&vxp=3Dmtr=
>
>=20
> Any thoughts? The price is certainly attractive...
>=20
>=20
> Brad
>=20
> On Tue, Jul 21, 2015 at 12:24 PM, MadMarx <tr4racing@googlemail.com =
> Hi Guys,
>=20
> =20
>=20
> After my engine blow at the last race and a rod in two pieces I =
investigated about rod design.
>=20
> =20
>=20
> In US forums I found an interesting opinion:
>=20
> =20
>=20
> H-beam rods are for low rev high torque engine (turbo, compressor)
>=20
> I-beam are for medium torque engines with high revs
>=20
> =20
>=20
> 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.
>=20
> 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.
>=20
> That means to me that the fatigue resistance is smaller on an H-beam =
rod at high revs.
>=20
> With high revs on a long stroke engine I mean 6000+.
>=20
> =20
>=20
> The manufacturer of the broken H-beam rod was Scat.
>=20
> =20
>=20
> I think next time I order an I-beam rod from Scat.
>=20
> =20
>=20
> What do you think?
>=20
> =20
>=20
> Cheers
>=20
> Chris
>=20
>=20
> _______________________________________________
>=20
> http://www.fot-racing.com <http://www.fot-racing.com/>
>=20
> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
> Archive: http://www.team.net/archive <http://www.team.net/archive>
> Forums: http://www.team.net/forums <http://www.team.net/forums>
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/tr4abrad@gmail.com =
<http://autox.team.net/mailman/options/fot/tr4abrad@gmail.com>
>=20
>=20
>=20
>=20
>=20
>=20
> --=20
> Brad Eells
> Friends of Triumph
> http://www.fot-racing.com/ <http://www.fot-racing.com/>
>=20
>=20
>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> 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/duncan.charlton54@gmail.com
>=20
>=20
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Those are the ones =E2=80=94 and we=E2=80=99ve discussed them =
here before. Some were skeptical but a couple of FoT=E2=80=99ers =
spoke up and said they=E2=80=99d used them and were happy with them.<div =
class=3D"">Duncan</div><div class=3D"">(Texas)</div><div class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Jul 22, 2015, at 8:05 PM, Brad Eells <<a =
href=3D"mailto:tr4abrad@gmail.com"; class=3D"">tr4abrad@gmail.com</a>> =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D"">Are these the Ebay rods that have been =
discussed?<div class=3D""><br class=3D""></div><div class=3D""><a =
href=3D"http://www.ebay.com/itm/Connecting-Rods-for-Triumph-TR3-TR4-Forged=
-Conrods-Con-Rod-158-75mm-ARP-Bolts-/131562025540?hash=3Ditem1ea1b53244&am=
p;vxp=3Dmtr" =
class=3D"">http://www.ebay.com/itm/Connecting-Rods-for-Triumph-TR3-TR4-For=
ged-Conrods-Con-Rod-158-75mm-ARP-Bolts-/131562025540?hash=3Ditem1ea1b53244=
&vxp=3Dmtr</a><br class=3D""></div><div class=3D""><br =
class=3D""></div><div class=3D"">Any thoughts? The price is certainly =
attractive...</div><div class=3D""><br class=3D""></div><div =
class=3D""><br class=3D""></div><div class=3D"">Brad</div></div><div =
class=3D"gmail_extra"><br class=3D""><div class=3D"gmail_quote">On Tue, =
Jul 21, 2015 at 12:24 PM, MadMarx <span dir=3D"ltr" class=3D""><<a =
href=3D"mailto:tr4racing@googlemail.com"; target=3D"_blank" =
class=3D"">tr4racing@googlemail.com</a>></span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"DE" =
link=3D"blue" vlink=3D"purple" class=3D""><div class=3D""><div =
class=3D""><p class=3D"MsoNormal"><span =
style=3D"font-size:10.0pt;font-family:"Verdana","sans-serif=
";color:#1f497d" class=3D"">Hi Guys,<u class=3D""></u><u =
class=3D""></u></span></p><p class=3D"MsoNormal"><span =
style=3D"font-size:10.0pt;font-family:"Verdana","sans-serif=
";color:#1f497d" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">After my engine blow at the last race =
and a rod in two pieces I investigated about rod design.<u =
class=3D""></u><u class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">In US forums I found an interesting =
opinion:<u class=3D""></u><u class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">H-beam rods are for low rev high torque =
engine (turbo, compressor)<u class=3D""></u><u =
class=3D""></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" class=3D"">I-beam are for medium torque engines =
with high revs<u class=3D""></u><u class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">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.<u class=3D""></u><u =
class=3D""></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" class=3D"">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.<u =
class=3D""></u><u class=3D""></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" class=3D"">That means to me that the fatigue =
resistance is smaller on an H-beam rod at high revs.<u class=3D""></u><u =
class=3D""></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" class=3D"">With high revs on a long stroke engine =
I mean 6000+.<u class=3D""></u><u class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">The manufacturer of the broken H-beam =
rod was Scat.<u class=3D""></u><u class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">I think next time I order an I-beam rod =
from Scat.<u class=3D""></u><u class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">What do you think?<u class=3D""></u><u =
class=3D""></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" class=3D""><u class=3D""></u> <u =
class=3D""></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" class=3D"">Cheers<u class=3D""></u><u =
class=3D""></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" class=3D"">Chris<u class=3D""></u><u =
class=3D""></u></span></p></div></div></div><br =
class=3D"">_______________________________________________<br class=3D"">
<a href=3D"mailto:fot@autox.team.net"; class=3D"">fot@autox.team.net</a><br=
class=3D"">
<br class=3D"">
<a href=3D"http://www.fot-racing.com/"; rel=3D"noreferrer" =
target=3D"_blank" class=3D"">http://www.fot-racing.com</a><br class=3D"">
<br class=3D"">
target=3D"_blank" class=3D"">http://www.team.net/donate.html</a><br =
class=3D"">
Archive: <a href=3D"http://www.team.net/archive"; rel=3D"noreferrer" =
target=3D"_blank" class=3D"">http://www.team.net/archive</a><br =
class=3D"">
Forums: <a href=3D"http://www.team.net/forums"; rel=3D"noreferrer" =
target=3D"_blank" class=3D"">http://www.team.net/forums</a><br class=3D"">=
href=3D"http://autox.team.net/mailman/options/fot/tr4abrad@gmail.com"; =
rel=3D"noreferrer" target=3D"_blank" =
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><br class=3D"">
<br class=3D"">
<br class=3D"">
<br class=3D""></blockquote></div><br class=3D""><br clear=3D"all" =
class=3D""><div class=3D""><br class=3D""></div>-- <br class=3D""><div =
class=3D"gmail_signature"><div dir=3D"ltr" class=3D""><div class=3D""><div=
dir=3D"ltr" class=3D""><div class=3D""><div dir=3D"ltr" class=3D""><div =
class=3D""><div dir=3D"ltr" class=3D""><div class=3D""><div dir=3D"ltr" =
class=3D""><div class=3D""><b class=3D"">Brad Eells</b></div><div =
class=3D""><b class=3D"">Friends of Triumph</b></div><div class=3D""><b =
class=3D""><a href=3D"http://www.fot-racing.com/"; target=3D"_blank" =
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class=3D""><b class=3D""><br class=3D""></b></div><div class=3D""><img =
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port=3Ddownload" width=3D"96" height=3D"71" class=3D""><br =
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class=3D""></div></div></div></div></div></div></div></div></div></div></d=
iv>
</div>
_______________________________________________<br class=3D""><a =
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class=3D""><br class=3D"">http://www.fot-racing.com<br class=3D""><br =
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