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Mock it up and check for interference between those bolt heads and the
inside of the timing chain cover.
On Mon, Sep 23, 2024 at 11:08=E2=80=AFAM fubog1 via Fot <fot@autox.team.net=
> wrote:
> Yes torque the hub to the cam to spec, using proper shouldered bolts, &
> cinch the screws up good w/a dab of blue loctite, they work fine.
>
> Glen Efinger
>
> On Monday, September 23, 2024 at 09:07:22 AM EDT, Erik Jacobsen via Fot <
> fot@autox.team.net> wrote:
>
>
> Phil,
> My two cents (no cash value [image: Emoji]). I have used vernier
> sprockets on my TR3, my wife's TR6 and my Bugeye race cars, and haven't h=
ad
> any issues. I don't torque them to a specific number since mine are all
> aluminum, but I do Loctite blue the screws. Have never had any slipping o=
r
> wear issues. And the ability to get the cam timing just right is awfully
> nice, especially on the 3 as it's so critical.
>
> Cheers,
> Jake
>
> On Monday, September 23, 2024 at 07:21:34 AM CDT, vfracing--- via Fot <
> fot@autox.team.net> wrote:
>
>
> Hi all;
>
> After completely and embarassingly blowing cam timing on two consecutive
> engines i bought from Moss a so-called "vernier" adjustable cam timing
> sprocket made by Powertune. It consists of a hub and sprocket held in
> relative position to each other with 6 Allen head cap screws near the
> periphery of the sprocket. The cap screws have a fancy machined and
> anodized aluminum washer under them to spread the load. (See picture).
>
> My question/concerns are:
>
> Is this robust enough to hold position? Is the friction between hub and
> sprocket sufficient?
>
> Do the aluminum "washers" hold up or do they creep over time, reducing th=
e
> clamping load and allowing it to slip?
>
> Does anyone have a suggestion for the torque spec on the 6 Allen headed
> cap screws (no specs given with the sprocket) or the hub to cam (book say=
s
> 24 - 26 ft lbs).
>
> Should I assemble this Loctite between the hub and sprocket to keep it
> from slipping?
>
> Or should I send this back and get a more robust unit? If so, where can =
I
> get a better one?
>
>
> Thanks!
>
>
> Phil Gott
>
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
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>
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>
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>
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>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">Moc=
k it up and check for interference between those bolt heads and the inside =
of the timing chain cover.</div></div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Mon, Sep 23, 2024 at 11:08=E2=80=AFAM fu=
bog1 via Fot <<a href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</=
a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0p=
x 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><d=
iv><div style=3D"font-family:Arial,Helvetica,sans-serif;font-size:16px"><di=
v></div>
<div dir=3D"ltr">Yes torque the hub to the cam to spec, using prope=
r shouldered bolts, & cinch the screws up good w/a dab of blue loctite,=
they work fine.</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Glen Efin=
ger<br></div><div><br></div>
=20
</div><div id=3D"m_-7667824531541607211ydp9eded9d5yahoo_quoted_7450=
912715"><div style=3D"font-family:Arial,Helvetica,sans-serif;font-size:16px=
">
<div style=3D"font-family:"Helvetica Neue",Helvetica,=
Arial,sans-serif;font-size:13px;color:rgb(38,40,42)">
=20
<div>
On Monday, September 23, 2024 at 09:07:22 AM EDT, E=
rik Jacobsen via Fot <<a href=3D"mailto:fot@autox.team.net"; target=3D"_b=
lank">fot@autox.team.net</a>> wrote:
</div>
</div><div style=3D"font-family:"Helvetica Neue",=
Helvetica,Arial,sans-serif;font-size:13px;color:rgb(38,40,42);border-left:1=
px solid rgb(204,204,204);padding-left:8px;margin:0px 0px 0px 8px">
<div><br></div><div><br></div>
<div><div id=3D"m_-7667824531541607211ydp9eded9d5yiv7673621=
670"><div><div style=3D"font-family:"Helvetica Neue",Helvetica,Ar=
ial,sans-serif;font-size:16px"><div></div>
<div dir=3D"ltr">Phil,</div><div dir=3D"ltr">My two cents (no cash =
value <img title=3D"Emoji" alt=3D"Emoji" height=3D"16" src=3D"https://s.yim=
g.com/nq/yemoji_assets/latest/yemoji_assets/1f609.png" width=3D"16" style=
=3D"padding: 0px 2px; vertical-align: middle;">). I have used vernier sproc=
kets on my TR3, my wife's TR6 and my Bugeye race cars, and haven't =
had any issues. I don't torque them to a specific number since mine are=
all aluminum, but I do Loctite blue the screws. Have never had any slippin=
g or wear issues. And the ability to get the cam timing just right is awful=
ly nice, especially on the 3 as it's so critical.=C2=A0</div><div dir=
=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr">Cheers,</div><div dir=3D=
"ltr">Jake</div><div><br clear=3D"none"></div>
=20
</div><div id=3D"m_-7667824531541607211ydp9eded9d5yiv7673621670ydpd=
f1d6466yahoo_quoted_7592342745">
<div style=3D"font-family:"Helvetica Neue",Helvetica,=
Arial,sans-serif;font-size:13px;color:rgb(38,40,42)">
=20
<div id=3D"m_-7667824531541607211ydp9eded9d5yiv7673621670yq=
t30552"><div>
On Monday, September 23, 2024 at 07:21:34 AM CDT, v=
fracing--- via Fot <<a href=3D"mailto:fot@autox.team.net"; target=3D"_bla=
nk">fot@autox.team.net</a>> wrote:
</div>
<div><br clear=3D"none"></div>
<div><br clear=3D"none"></div>
=20
=20
<div><div id=3D"m_-7667824531541607211ydp9eded9d5yiv7673621=
670ydpdf1d6466yiv9746831058"><div><div style=3D"font-family:arial;font-size=
:16px"><div dir=3D"ltr">Hi all;</div><div dir=3D"ltr"><br clear=3D"none"></=
div><div dir=3D"ltr">After completely and embarassingly blowing cam timing =
on two consecutive engines i bought from Moss a so-called "vernier&quo=
t; adjustable cam timing sprocket made by Powertune.=C2=A0 It consists of a=
hub and sprocket held in relative position to each other with 6 Allen head=
cap screws near the periphery of the sprocket.=C2=A0 The cap screws have a=
fancy machined and anodized aluminum washer under them to spread the load.=
(See picture).</div><div dir=3D"ltr"><br clear=3D"none"></div><div dir=3D"=
ltr">My question/concerns are:</div><div dir=3D"ltr"><br clear=3D"none"></d=
iv><blockquote style=3D"margin:0px 0px 0px 40px;border-width:medium;border-=
style:none;border-color:currentcolor;padding:0px"><div dir=3D"ltr">Is this =
robust enough to hold position?=C2=A0 Is the friction between hub and sproc=
ket sufficient? =C2=A0</div><div dir=3D"ltr"><br clear=3D"none"></div><div =
dir=3D"ltr">Do the aluminum "washers" hold up or do they creep ov=
er time, reducing the clamping load and allowing it to slip?</div><div dir=
=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr">Does anyone have a sugge=
stion for the torque spec on the 6 Allen headed cap screws (no specs given =
with the sprocket) or the hub to cam (book says 24 - 26 ft lbs).</div><div =
dir=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr">Should I assemble thi=
s Loctite between the hub and sprocket to keep it from slipping?</div><div =
dir=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr">Or should I send this=
back and get a more robust unit?=C2=A0 If so, where can I get a better one=
?</div></blockquote><div dir=3D"ltr"><br clear=3D"none"></div><div dir=3D"l=
tr">Thanks!</div><div dir=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr"=
><br clear=3D"none"></div><div dir=3D"ltr">Phil Gott</div><div dir=3D"ltr">=
<br clear=3D"none"></div><div dir=3D"ltr"><br clear=3D"none"></div></div></=
div></div>_______________________________________________<br clear=3D"none"=
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</blockquote></div>
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