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Thanks. That makes sense now ..
On Mon, Dec 6, 2021 at 9:38 AM Jason Sukey <jsukey@gmail.com> wrote:
> Hi PJ,
> In theory, the closer the wrist pin is to the top of the piston,
> the more stable the piston is in the bore; the rings will seal better. A=
nd
> the piston can be shorter with less mass.
>
> Longer rods lead to less thrust loading of the piston against the cylinde=
r
> wall. Less friction for more power and less wear.
>
> There's also the argument of rod length to stroke ratio, but I doubt we
> are making enough change here to count this as a benefit.
>
> I can't say exactly how much power it's really worth, .... but if you are
> ordering custom pistons and rods anyways, it doesn't add any cost to make
> them "better".
>
> Jason
>
> On Mon, Dec 6, 2021 at 10:32 AM McKearn McKearn <mckearn2@gmail.com>
> wrote:
>
>> Can you explaine the longer rods and TR6 pistons to me please?
>> Thanks. P.J.
>>
>> On Mon, Dec 6, 2021 at 12:51 AM Geoff Byrne via Fot <fot@autox.team.net>
>> wrote:
>>
>>> You don=E2=80=99t need a billet crank in the 2litre motor mine revs to =
8 but
>>> what you do need are 9 mm longer rods and then use TR 6 pistons
>>> Geoff Byrne , TR racer down under
>>>
>>> Sent from my iPad
>>>
>>> On 6 Dec 2021, at 2:41 pm, Jason Sukey via Fot <fot@autox.team.net>
>>> wrote:
>>>
>>> =EF=BB=BF
>>> One more vote for a properly prepared stock crank. Mine is balanced and
>>> nitrided, but with a stock "damper". No issues reving safely north of
>>> 7,000. Auxiliary oiling to the front main bearings is a must for high =
rpm.
>>>
>>> I have Pauter rods, a little heavier than Carillo's, but have larger
>>> bolts. (5/16" vs 1/4" if I remember correctly)
>>>
>>> I'm running Venolia forged pistons, they work well but have since gone
>>> out of business.
>>>
>>> If you are going the custom rods/custom pistons route, consider having
>>> the pistons made with a shorter compression height than stock, and long=
er
>>> rods to match.
>>>
>>> Jason
>>>
>>> On Sun, Dec 5, 2021, 10:25 PM Scott Janzen via Fot <fot@autox.team.net>
>>> wrote:
>>>
>>>> I run a stock crank, crack tested, balanced, nitrided, with a vibratio=
n
>>>> damper - no problem revving into the sevens, consistently. I=E2=80=99=
m not sure
>>>> you need billet on a GT6. Never had a bottom end failure.
>>>> Rods - Carillo - only drawback is little tiny bolts that need to be
>>>> torqued by stretch gauge. If you use the wrong lube on them you can
>>>> overtorque them easily, and the little buggers cost about $40 each (as=
k me
>>>> how I know).
>>>> Pistons - I=E2=80=99ve had good luck with Wiseco making them for me -
>>>> reasonable price, good specs, will make them any way you want them.
>>>>
>>>> On Dec 5, 2021, at 10:18 PM, McKearn McKearn via Fot <
>>>> fot@autox.team.net> wrote:
>>>>
>>>> Hi all.
>>>> Am looking for info on GT6 billet crankshafts. Also looking for
>>>> opinions on connecting rods and forged pistons. Starting with the bot=
tom
>>>> end this time..
>>>> Thanks . P.J.
>>>> _______________________________________________
>>>> fot@autox.team.net
>>>>
>>>> http://www.fot-racing.com
>>>>
>>>> Donate: http://www.team.net/donate.html
>>>> Archive: http://autox.team.net/archive
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>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> fot@autox.team.net
>>>>
>>>> http://www.fot-racing.com
>>>>
>>>> Donate: http://www.team.net/donate.html
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>>>>
>>>>
>>>> _______________________________________________
>>> fot@autox.team.net
>>>
>>> http://www.fot-racing.com
>>>
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>>>
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>>>
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>>>
>>> Donate: http://www.team.net/donate.html
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>>>
>>>
>>>
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<div dir=3D"ltr">Thanks. That makes sense now ..</div><div dir=3D"ltr"></di=
v><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On M=
on, Dec 6, 2021 at 9:38 AM Jason Sukey <<a href=3D"mailto:jsukey@gmail.c=
om" target=3D"_blank">jsukey@gmail.com</a>> wrote:<br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Hi PJ,<div>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0In theory, the closer the wrist pin is to the to=
p of the piston, the more stable the piston is in the bore; the rings will =
seal better.=C2=A0 And the piston can be shorter with less mass.</div><div =
dir=3D"auto"><br></div><div dir=3D"auto">Longer rods lead to less thrust lo=
ading of the piston against the cylinder wall.=C2=A0 Less friction for more=
power and less wear.=C2=A0</div><div dir=3D"auto"><br></div><div>There'=
;s also the argument of rod length to stroke ratio, but I doubt we are maki=
ng enough change here to count this as a benefit.</div><div dir=3D"auto"><b=
r></div><div dir=3D"auto">I can't say exactly how much power it's r=
eally worth, .... but if you are ordering custom pistons and rods anyways, =
it doesn't add any cost to make them "better".</div><div dir=
=3D"auto"><br></div><div>Jason</div></div><br><div class=3D"gmail_quote"><d=
iv dir=3D"ltr" class=3D"gmail_attr">On Mon, Dec 6, 2021 at 10:32 AM McKearn=
McKearn <<a href=3D"mailto:mckearn2@gmail.com"; target=3D"_blank">mckear=
n2@gmail.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex"><div dir=3D"ltr">Can you explaine the longer rods and TR6 pisto=
ns to me please?<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Thanks. P.J.</div></div><br><=
div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Dec=
6, 2021 at 12:51 AM Geoff Byrne via Fot <<a href=3D"mailto:fot@autox.te=
am.net" target=3D"_blank">fot@autox.team.net</a>> wrote:<br></div><block=
quote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"auto">You don=E2=80=
=99t need a billet crank in the 2litre motor mine revs to 8 but what you do=
need are 9 mm longer rods and then use TR 6 pistons=C2=A0<div>Geoff Byrne =
, TR racer down under<br><br><div dir=3D"ltr">Sent from my iPad</div><div d=
ir=3D"ltr"><br><blockquote type=3D"cite">On 6 Dec 2021, at 2:41 pm, Jason S=
ukey via Fot <<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fo=
t@autox.team.net</a>> wrote:<br><br></blockquote></div><blockquote type=
=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto"><div>One more vote fo=
r a properly prepared stock crank. Mine is balanced and nitrided, but with =
a stock "damper".=C2=A0 No issues reving safely north of 7,000.=
=C2=A0 Auxiliary oiling to the front main bearings is a must for high rpm.<=
/div><div dir=3D"auto"><br></div><div dir=3D"auto">I have Pauter rods,=C2=
=A0 a little heavier than Carillo's, but have larger bolts.=C2=A0 =C2=
=A0(5/16" vs 1/4" if I remember correctly)=C2=A0</div><div dir=3D=
"auto"><br></div><div dir=3D"auto">I'm running Venolia forged pistons, =
they work well but have since gone out of business.</div><div dir=3D"auto">=
<br></div><div dir=3D"auto">If you are going the custom rods/custom pistons=
route,=C2=A0 consider having the pistons made with a shorter compression h=
eight than stock, and longer rods to match.</div><div dir=3D"auto"><br></di=
v><div dir=3D"auto">Jason<br><br><div class=3D"gmail_quote" dir=3D"auto"><d=
iv dir=3D"ltr" class=3D"gmail_attr">On Sun, Dec 5, 2021, 10:25 PM Scott Jan=
zen via Fot <<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fot=
@autox.team.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex"><div>I run a stock crank, crack tested, balanced, nitrided, =
with a vibration damper - no problem revving into the sevens, consistently.=
=C2=A0 I=E2=80=99m not sure you need billet on a GT6.=C2=A0 Never had a bot=
tom end failure.<div>Rods - Carillo - only drawback is little tiny bolts th=
at need to be torqued by stretch gauge.=C2=A0 If you use the wrong lube on =
them you can overtorque them easily, and the little buggers cost about $40 =
each (ask me how I know).</div><div>Pistons - I=E2=80=99ve had good luck wi=
th Wiseco making them for me - reasonable price, good specs, will make them=
any way you want them.<br><div><br><div>On Dec 5, 2021, at 10:18 PM, McKea=
rn McKearn via Fot <<a href=3D"mailto:fot@autox.team.net"; rel=3D"norefer=
rer" target=3D"_blank">fot@autox.team.net</a>> wrote:</div><br><div><div=
dir=3D"ltr">Hi all.<div>=C2=A0Am looking for info on GT6 billet crankshaft=
s.=C2=A0 Also looking for opinions on connecting rods and forged pistons.=
=C2=A0 Starting with the bottom end this time..</div><div>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0Thanks . P.J.</div></div>
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