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I use what Richard Good sells - don=E2=80=99t know if he has an =
equivalent for the Tr4. Never had anything loosen up. the heads of the =
bolts that attach it to the cam are drilled and wired.
On Sep 23, 2024, at 8:35 AM, Erik Jacobsen via Fot <fot@autox.team.net> =
wrote:
Phil,
My two cents (no cash value ). 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 specific 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.=20
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? =20
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? If so, where can =
I get a better one?
Thanks!
Phil Gott
_______________________________________________
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Archive: http://autox.team.net/archive <http://autox.team.net/archive> =
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_______________________________________________
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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; line-break: after-white-space;" class=3D"">I =
use what Richard Good sells - don=E2=80=99t know if he has an equivalent =
for the Tr4. Never had anything loosen up. the heads of the =
bolts that attach it to the cam are drilled and wired.<br =
class=3D""><div><br class=3D""><div class=3D"">On Sep 23, 2024, at 8:35 =
AM, Erik Jacobsen via Fot <<a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div class=3D""><div =
class=3D"ydpaaa09c28yahoo-style-wrap" style=3D"font-family:Helvetica =
Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div class=3D""></div>=
<div dir=3D"ltr" data-setdir=3D"false" class=3D"">Phil,</div><div =
dir=3D"ltr" data-setdir=3D"false" class=3D"">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.yimg.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 specific 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" class=3D""><br class=3D""></div><div =
dir=3D"ltr" data-setdir=3D"false" class=3D"">Cheers,</div><div dir=3D"ltr"=
data-setdir=3D"false" class=3D"">Jake</div><div class=3D""><br =
class=3D""></div>
=20
</div><div id=3D"ydpdf1d6466yahoo_quoted_7592342745" =
class=3D"ydpdf1d6466yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, =
Arial, sans-serif;font-size:13px;color:#26282a;" class=3D"">
=20
<div class=3D"">
On Monday, September 23, 2024 at 07:21:34 AM =
CDT, vfracing--- via Fot <<a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a>> wrote:
</div>
<div class=3D""><br class=3D""></div>
<div class=3D""><br class=3D""></div>
=20
=20
<div class=3D""><div id=3D"ydpdf1d6466yiv9746831058" =
class=3D""><div class=3D""><div =
style=3D"font-family:arial;font-size:16px;" =
class=3D"ydpdf1d6466yiv9746831058yahoo-style-wrap"><div dir=3D"ltr" =
class=3D"">Hi all;</div><div dir=3D"ltr" class=3D""><br =
class=3D""></div><div dir=3D"ltr" class=3D"">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).</div><div =
dir=3D"ltr" class=3D""><br class=3D""></div><div dir=3D"ltr" class=3D"">My=
question/concerns are:</div><div dir=3D"ltr" class=3D""><br =
class=3D""></div><blockquote style=3D"margin:0 0 0 =
40px;border:none;padding:0px;" class=3D""><div dir=3D"ltr" class=3D"">Is =
this robust enough to hold position? Is the friction between hub =
and sprocket sufficient? </div><div dir=3D"ltr" class=3D""><br =
class=3D""></div><div dir=3D"ltr" class=3D"">Do the aluminum "washers" =
hold up or do they creep over time, reducing the clamping load and =
allowing it to slip?</div><div dir=3D"ltr" class=3D""><br =
class=3D""></div><div dir=3D"ltr" class=3D"">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).</div><div dir=3D"ltr" class=3D""><br class=3D""></div><div =
dir=3D"ltr" class=3D"">Should I assemble this Loctite between the hub =
and sprocket to keep it from slipping?</div><div dir=3D"ltr" =
class=3D""><br class=3D""></div><div dir=3D"ltr" class=3D"">Or should I =
send this back and get a more robust unit? If so, where can I get =
a better one?</div></blockquote><div dir=3D"ltr" class=3D""><br =
class=3D""></div><div dir=3D"ltr" class=3D"">Thanks!</div><div dir=3D"ltr"=
class=3D""><br class=3D""></div><div dir=3D"ltr" class=3D""><br =
class=3D""></div><div dir=3D"ltr" class=3D"">Phil Gott</div><div =
dir=3D"ltr" class=3D""><br class=3D""></div><div dir=3D"ltr" =
class=3D""><br =
class=3D""></div></div></div></div>_______________________________________=
________<br class=3D""><a href=3D"mailto:fot@autox.team.net"; =
rel=3D"nofollow" target=3D"_blank" class=3D"">fot@autox.team.net</a><br =
class=3D""><br class=3D""><a href=3D"http://www.fot-racing.com/"; =
rel=3D"nofollow" target=3D"_blank" =
class=3D"">http://www.fot-racing.com</a><br class=3D""><br =
class=3D"">Donate: <a href=3D"http://www.team.net/donate.html"; =
rel=3D"nofollow" target=3D"_blank" =
class=3D"">http://www.team.net/donate.html</a><br class=3D"">Archive: <a =
href=3D"http://autox.team.net/archive"; rel=3D"nofollow" target=3D"_blank" =
class=3D"">http://autox.team.net/archive</a> <a =
href=3D"http://www.team.net/pipermail/fot"; rel=3D"nofollow" =
target=3D"_blank" class=3D"">http://www.team.net/pipermail/fot</a><br =
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</a><br class=3D""><br class=3D""><br class=3D""></div>
</div>
</div></div>_______________________________________________<br =
class=3D""><a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a><br class=3D""><br =
class=3D"">http://www.fot-racing.com<br class=3D""><br class=3D"">Donate: =
http://autox.team.net/archive http://www.team.net/pipermail/fot<br =
class=3D"">Unsubscribe/Manage: =
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