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Phil,My two cents (no cash value ). I have used vernier sprockets on my TR=
3, 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 L=
octite blue the screws. Have never had any slipping or wear issues. And the=
ability to get the cam timing just right is awfully nice, especially on th=
e 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
=20
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<html><head></head><body><div class=3D"ydpaaa09c28yahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px=
;"><div></div>
<div dir=3D"ltr" data-setdir=3D"false">Phil,</div><div dir=3D"ltr" =
data-setdir=3D"false">My two cents (no cash value <img title=3D"Emoji" alt=
=3D"Emoji" class=3D"yahoo-emoji-wrapper" 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;" data-inlineimagemanipulating=
=3D"true">). I have used vernier sprockets 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 spec=
ific number since mine are all aluminum, but I do Loctite blue the screws. =
Have never had any slipping or wear issues. And the ability to get the cam =
timing just right is awfully nice, especially on the 3 as it's so critical.=
</div><div dir=3D"ltr" data-setdir=3D"false"><br></div><div dir=3D"lt=
r" data-setdir=3D"false">Cheers,</div><div dir=3D"ltr" data-setdir=3D"false=
">Jake</div><div><br></div>
=20
</div><div id=3D"ydpdf1d6466yahoo_quoted_7592342745" class=3D"ydpdf=
1d6466yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Monday, September 23, 2024 at 07:21:34 AM CDT, v=
fracing--- via Fot <fot@autox.team.net> wrote:
</div>
<div><br></div>
<div><br></div>
=20
=20
<div><div id=3D"ydpdf1d6466yiv9746831058"><div><div style=
=3D"font-family:arial;font-size:16px;" class=3D"ydpdf1d6466yiv9746831058yah=
oo-style-wrap"><div dir=3D"ltr">Hi all;</div><div dir=3D"ltr"><br></div><di=
v dir=3D"ltr">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 a=
nd anodized aluminum washer under them to spread the load. (See picture).</=
div><div dir=3D"ltr"><br></div><div dir=3D"ltr">My question/concerns are:</=
div><div dir=3D"ltr"><br></div><blockquote style=3D"margin:0 0 0 40px;borde=
r:none;padding:0px;"><div dir=3D"ltr">Is this robust enough to hold positio=
n? Is the friction between hub and sprocket sufficient? </div><=
div dir=3D"ltr"><br></div><div dir=3D"ltr">Do the aluminum "washers" hold u=
p or do they creep over time, reducing the clamping load and allowing it to=
slip?</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Does anyone have a =
suggestion for the torque spec on the 6 Allen headed cap screws (no specs g=
iven with the sprocket) or the hub to cam (book says 24 - 26 ft lbs).</div>=
<div dir=3D"ltr"><br></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></div><div dir=3D"ltr">Or should I send this back and get a more robu=
st unit? If so, where can I get a better one?</div></blockquote><div =
dir=3D"ltr"><br></div><div dir=3D"ltr">Thanks!</div><div dir=3D"ltr"><br></=
div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Phil Gott</div><div dir=3D"=
ltr"><br></div><div dir=3D"ltr"><br></div></div></div></div>_______________=
________________________________<br><a href=3D"mailto:fot@autox.team.net"; r=
el=3D"nofollow" target=3D"_blank">fot@autox.team.net</a><br><br><a href=3D"=
http://www.fot-racing.com"; rel=3D"nofollow" target=3D"_blank">http://www.fo=
t-racing.com</a><br><br>Donate: <a href=3D"http://www.team.net/donate.html"=
rel=3D"nofollow" target=3D"_blank">http://www.team.net/donate.html</a><br>=
Archive: <a href=3D"http://autox.team.net/archive"; rel=3D"nofollow" target=
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t/pipermail/fot" rel=3D"nofollow" target=3D"_blank">http://www.team.net/pip=
ermail/fot</a><br>Unsubscribe/Manage: <a href=3D"http://autox.team.net/mail=
man/options/fot/kekjacobsen@yahoo.com" rel=3D"nofollow" target=3D"_blank">h=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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