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Re: [Fot] Mystery cam

To: Kas Kastner <kaskastner@gmail.com>
Subject: Re: [Fot] Mystery cam
From: Bill Babcock <ponobill@gmail.com>
Date: Tue, 14 Jun 2016 14:20:38 -0700
Cc: Friends of Triumph <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <294DA329-A981-49E4-BE88-7A1E0B27DA73@ponostyle.com> <88D4C783-ADF2-4987-ABCC-AABA8AC61C16@gmail.com> <632EB0ED-AF33-4C73-9EF4-A703C801B4C3@gmail.com> <CAGiQU1A5aH+8hB1mOV=SvxbMHEJhEuv4+Jv9Su8gXqja03QYrg@mail.gmail.com>
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It=E2=80=99s the cam that was working so well. Pretty sure it=E2=80=99s =
a BFE, but no, I=E2=80=9Dm not letting this go until I know. Right now =
the numbers are totally screwball, but I=E2=80=99ll figure it out.=20


> On Jun 14, 2016, at 1:46 PM, Kas Kastner <kaskastner@gmail.com> wrote:
>=20
> It is difficult for me to believe that Bill is just going to say "oh =
what the hell, I'll just put it in"   :-)
>=20
> Never be beaten by equipment.
>=20
>=20
> On Tue, Jun 14, 2016 at 10:46 AM, Bill Babcock <ponobill@gmail.com =
> Searching around on the web, it kind of looks like a TilTech 298Dx, =
but I don=E2=80=99t recall buying a cam from Larry and Tony Garmey =
doesn=E2=80=99t think so either. I could just set it up as if it were, =
but it would be good to know.
>=20
>=20
> > On Jun 14, 2016, at 10:40 AM, Bill Babcock <ponobill@gmail.com =
> >
> > Oh, and the lift is .372
> >
> >
> >> On Jun 14, 2016, at 10:11 AM, Bill Babcock <ponobill@gmail.com =
> >>
> >> I=E2=80=99m building a new motor for Peyote from the bits of it=E2=80=
=99s previous engine. I discovered the front main bearing cap was =
cracked in half when I decided to freshen the motor. I=E2=80=99ll work =
on replacing the cap later=E2=80=94maybe get a billet one made, but in =
the meantime I=E2=80=99ve run into a minor problem. I don=E2=80=99t know =
for sure what cam I have or how it should be set.  Tony Garmey says =
it=E2=80=99s a BFE cam, but I can=E2=80=99t find any specs for those and =
can=E2=80=99t get ahold of Ken.
> >>
> >> I ballparked where I think the cam might want to be and got this =
for measurements:
> >>
> >> Reading the Intake and exhaust valve movement from the spring =
retainers I use 0.033=E2=80=9D as the open/close height which is =
.050/1.45 which as I recall is the ratio of the stock rockers=E2=80=9D
> >> Intake open .033 @ 36 BTC
> >> Intaake close .033=E2=80=9D @ 76 ABC
> >> Exhaust open .033=E2=80=9D @ 76 ABC
> >> Exhaust close .033=E2=80=9D @ 42 ATC
> >>
> >> By my calculations that gives:
> >> Intake duration 292.0 degrees
> >> Exhaust duration 298 degrees
> >> Intake lobe center 110.0 ATC
> >> Exhaust lobe center 107 BTC
> >> Overlap 78
> >> Lobe separation angle 108.5
> >>
> >> Pretty sure this isn=E2=80=99t exactly where it needs to be. I have =
a vernier sprocket so I can adjust the timing precisely. My questions =
are:
> >>
> >> What cam is this?
> >> Where should it be set?
> >> How much advance?
> >
>=20
> _______________________________________________
>=20
> http://www.fot-racing.com <http://www.fot-racing.com/>
>=20
> Donate: http://www.team.net/donate.html =
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>=20
>=20
>=20


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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; -webkit-line-break: after-white-space;" =
class=3D"">It=E2=80=99s the cam that was working so well. Pretty sure =
it=E2=80=99s a BFE, but no, I=E2=80=9Dm not letting this go until I =
know. Right now the numbers are totally screwball, but I=E2=80=99ll =
figure it out.&nbsp;<div class=3D""><br class=3D""></div><div =
class=3D""><br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jun 14, 2016, at 1:46 PM, Kas Kastner &lt;<a =
href=3D"mailto:kaskastner@gmail.com"; =
class=3D"">kaskastner@gmail.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D"">It is difficult for me to believe that Bill is just going to =
say "oh what the hell, I'll just put it in"&nbsp;&nbsp; :-)</div><div =
class=3D"gmail_extra"><br clear=3D"all" class=3D""><div class=3D""><div =
class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><p =
class=3D""><strong class=3D""><font color=3D"#000099" class=3D"">Never =
be beaten by equipment.</font></strong></p></div></div>
<br class=3D""><div class=3D"gmail_quote">On Tue, Jun 14, 2016 at 10:46 =
AM, Bill Babcock <span dir=3D"ltr" class=3D"">&lt;<a =
href=3D"mailto:ponobill@gmail.com"; target=3D"_blank" =
class=3D"">ponobill@gmail.com</a>&gt;</span> wrote:<br =
class=3D""><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 =
.8ex;border-left:1px #ccc solid;padding-left:1ex">Searching around on =
the web, it kind of looks like a TilTech 298Dx, but I don=E2=80=99t =
recall buying a cam from Larry and Tony Garmey doesn=E2=80=99t think so =
either. I could just set it up as if it were, but it would be good to =
know.<br class=3D"">
<br class=3D"">
<br class=3D"">
&gt; On Jun 14, 2016, at 10:40 AM, Bill Babcock &lt;<a =
href=3D"mailto:ponobill@gmail.com"; class=3D"">ponobill@gmail.com</a>&gt; =
wrote:<br class=3D"">
&gt;<br class=3D"">
&gt; Oh, and the lift is .372<br class=3D"">
&gt;<br class=3D"">
&gt;<br class=3D"">
&gt;&gt; On Jun 14, 2016, at 10:11 AM, Bill Babcock &lt;<a =
href=3D"mailto:ponobill@gmail.com"; class=3D"">ponobill@gmail.com</a>&gt; =
wrote:<br class=3D"">
&gt;&gt;<br class=3D"">
&gt;&gt; I=E2=80=99m building a new motor for Peyote from the bits of =
it=E2=80=99s previous engine. I discovered the front main bearing cap =
was cracked in half when I decided to freshen the motor. I=E2=80=99ll =
work on replacing the cap later=E2=80=94maybe get a billet one made, but =
in the meantime I=E2=80=99ve run into a minor problem. I don=E2=80=99t =
know for sure what cam I have or how it should be set.&nbsp; Tony Garmey =
says it=E2=80=99s a BFE cam, but I can=E2=80=99t find any specs for =
those and can=E2=80=99t get ahold of Ken.<br class=3D"">
&gt;&gt;<br class=3D"">
&gt;&gt; I ballparked where I think the cam might want to be and got =
this for measurements:<br class=3D"">
&gt;&gt;<br class=3D"">
&gt;&gt; Reading the Intake and exhaust valve movement from the spring =
retainers I use 0.033=E2=80=9D as the open/close height which is =
.050/1.45 which as I recall is the ratio of the stock rockers=E2=80=9D<br =
class=3D"">
&gt;&gt; Intake open .033 @ 36 BTC<br class=3D"">
&gt;&gt; Intaake close .033=E2=80=9D @ 76 ABC<br class=3D"">
&gt;&gt; Exhaust open .033=E2=80=9D @ 76 ABC<br class=3D"">
&gt;&gt; Exhaust close .033=E2=80=9D @ 42 ATC<br class=3D"">
&gt;&gt;<br class=3D"">
&gt;&gt; By my calculations that gives:<br class=3D"">
&gt;&gt; Intake duration 292.0 degrees<br class=3D"">
&gt;&gt; Exhaust duration 298 degrees<br class=3D"">
&gt;&gt; Intake lobe center 110.0 ATC<br class=3D"">
&gt;&gt; Exhaust lobe center 107 BTC<br class=3D"">
&gt;&gt; Overlap 78<br class=3D"">
&gt;&gt; Lobe separation angle 108.5<br class=3D"">
&gt;&gt;<br class=3D"">
&gt;&gt; Pretty sure this isn=E2=80=99t exactly where it needs to be. I =
have a vernier sprocket so I can adjust the timing precisely. My =
questions are:<br class=3D"">
&gt;&gt;<br class=3D"">
&gt;&gt; What cam is this?<br class=3D"">
&gt;&gt; Where should it be set?<br class=3D"">
&gt;&gt; How much advance?<br class=3D"">
&gt;<br class=3D"">
<br class=3D"">
_______________________________________________<br class=3D"">
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 class=3D"">
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