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Yes torque the hub to the cam to spec, using proper shouldered bolts, & ci=
nch 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: =20
Phil,My two cents (no cash value ). I have used vernier sprockets on my T=
R3, my wife's TR6 and my Bugeye race cars, and haven't had any issues. I do=
n't torque them to a specific number since mine are all aluminum, but I do =
Loctite blue the screws. Have never had any slipping or wear issues. And th=
e ability to get the cam timing just right is awfully nice, especially on t=
he 3 as it's so critical.=C2=A0
Cheers,Jake
On Monday, September 23, 2024 at 07:21:34 AM CDT, vfracing--- via Fot <=
fot@autox.team.net> wrote: =20
=20
Hi all;
After completely and embarassingly blowing cam timing on two consecutive en=
gines i bought from Moss a so-called "vernier" adjustable cam timing sprock=
et made by Powertune. =C2=A0It consists of a hub and sprocket held in relat=
ive position to each other with 6 Allen head cap screws near the periphery =
of the sprocket. =C2=A0The cap screws have a fancy machined and anodized al=
uminum washer under them to spread the load. (See picture).
My question/concerns are:
Is this robust enough to hold position? =C2=A0Is the friction between hub a=
nd sprocket sufficient? =C2=A0
Do the aluminum "washers" hold up or do they creep over time, reducing the =
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 says 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? =C2=A0If so, where c=
an I get a better one?
Thanks!
Phil Gott
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
ahoo.com
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
m
=20
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<html><head></head><body><div class=3D"ydpf8d136eeyahoo-style-wrap" style=
=3D"font-family:Arial, Helvetica, sans-serif;font-size:16px;"><div></div>
<div dir=3D"ltr" data-setdir=3D"false">Yes torque the hub to the ca=
m to spec, using proper shouldered bolts, & cinch the screws up good w/=
a dab of blue loctite, they work fine.</div><div dir=3D"ltr" data-setdir=3D=
"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Glen Efinger<br></=
div><div><br></div>
=20
</div><div id=3D"ydp9eded9d5yahoo_quoted_7450912715" class=3D"ydp9e=
ded9d5yahoo_quoted"><div class=3D"ydp9eded9d5yahoo-style-wrap" style=3D"fon=
t-family:Arial, Helvetica, sans-serif;font-size:16px;">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div class=3D"ydp9eded9d5quoted-text-header">
On Monday, September 23, 2024 at 09:07:22 AM EDT, E=
rik Jacobsen via Fot <fot@autox.team.net> wrote:
</div>
</div><div style=3D"font-family:'Helvetica Neue', Helvetica=
, Arial, sans-serif;font-size:13px;color:#26282a;border-left: 1px solid #cc=
c;padding-left: 8px;margin: 0px 0px 0px 8px" class=3D"ydp9eded9d5inline_rep=
ly_quote_container" data-split-quote-node=3D"true">
<div><br></div><div><br></div>
<div><div id=3D"ydp9eded9d5yiv7673621670"><div><div style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px=
;" class=3D"ydp9eded9d5yiv7673621670ydpaaa09c28yahoo-style-wrap"><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;" class=3D"ydp9eded9d5yiv76736216=
70yahoo-emoji-wrapper" data-inlineimagemanipulating=3D"true">). I have used=
vernier sprockets on my TR3, my wife's TR6 and my Bugeye race cars, and ha=
ven't had any issues. I don't torque them to a specific number since mine a=
re all aluminum, but I do Loctite blue the screws. Have never had any slipp=
ing or wear issues. And the ability to get the cam timing just right is awf=
ully nice, especially on the 3 as it's so critical. </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"ydp9eded9d5yiv7673621670ydpdf1d6466yahoo_quoted_75=
92342745" class=3D"ydp9eded9d5yiv7673621670ydpdf1d6466yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div id=3D"ydp9eded9d5yiv7673621670yqt30552" class=3D"ydp9e=
ded9d5yiv7673621670yqt3898724841"><div>
On Monday, September 23, 2024 at 07:21:34 AM CDT, v=
fracing--- via Fot <fot@autox.team.net> wrote:
</div>
<div><br clear=3D"none"></div>
<div><br clear=3D"none"></div>
=20
=20
<div><div id=3D"ydp9eded9d5yiv7673621670ydpdf1d6466yiv97468=
31058"><div><div style=3D"font-family:arial;font-size:16px;" class=3D"ydp9e=
ded9d5yiv7673621670ydpdf1d6466yiv9746831058yahoo-style-wrap"><div dir=3D"lt=
r">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 en=
gines i bought from Moss a so-called "vernier" adjustable cam timing sprock=
et made by Powertune. It consists of a hub and sprocket held in relat=
ive 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 al=
uminum 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"></div><blockquote style=3D"margi=
n: 0px 0px 0px 40px; border-width: medium; border-style: none; border-color=
: currentcolor; padding: 0px;"><div dir=3D"ltr">Is this robust enough to ho=
ld position? Is the friction between hub and sprocket sufficient? &nb=
sp;</div><div dir=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr">Do the =
aluminum "washers" hold up or do they creep over time, reducing the clampin=
g load and allowing it to slip?</div><div dir=3D"ltr"><br clear=3D"none"></=
div><div dir=3D"ltr">Does anyone have a suggestion for the torque spec on t=
he 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 this 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 un=
it? If so, where can I get a better one?</div></blockquote><div dir=
=3D"ltr"><br clear=3D"none"></div><div dir=3D"ltr">Thanks!</div><div dir=3D=
"ltr"><br clear=3D"none"></div><div dir=3D"ltr"><br clear=3D"none"></div><d=
iv dir=3D"ltr">Phil Gott</div><div dir=3D"ltr"><br clear=3D"none"></div><di=
v dir=3D"ltr"><br clear=3D"none"></div></div></div></div>__________________=
_____________________________<br clear=3D"none"><a shape=3D"rect" href=3D"m=
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