--===============5306243820283008626==
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I redid the numbers with the rockers removed, with the dial indicator in =
the cup of the centered pushrod. Measured open/close at .050. I set the =
intake lobe center to 108 using .070=E2=80=9D before the maximum lift =
reading (.370) and then got these numbers:=20
Intake opens (.050=E2=80=9D) at 28 BTC
Closes (.050=E2=80=9D) at 66 ABC
Exhaust opens (.050=E2=80=9D) at 62 BBC
exhaust closes (.050=E2=80=9D) 33 BTC
Calculated:=20
61 degree overlap
274 duration intake
275 duration exhaust
106.75 lobe separation
Intake lobe center 109
exhaust LC 104.5
the calculated intake lobe center using 050=E2=80=9D from open/close is =
a degree more than the measured using .070=E2=80=9D before max lift. =
seems odd, but it's been a long day staring at little numbers. At least =
it=E2=80=99s starting to look something like a cam.=20
> On Jun 14, 2016, at 4:19 PM, Kas Kastner <kaskastner@gmail.com> wrote:
>=20
> And at what clearance are you getting these numbers? I've a bunch of =
cam data I can check against and maybe assist here. Are you taking the =
checking clearance of about.016 or at .050?
>=20
> Never be beaten by equipment.
>=20
>=20
> On Tue, Jun 14, 2016 at 11:12 AM, Bill Babcock <ponobill@gmail.com =
> I set it up like a Tiltech 298DX and got:
> Intake
> 45 BTC
> 71 ABC
> Exhaust
> 82 ABC
> 35 ATC
>=20
> Intake duration =3D 296
> Exhaust duration 297
> Intake lobe center 103 ADC
> Exhaust LC 113.5 BTC
> Lobe sep 108.3
> Overlap 80
>=20
> Still doesn=E2=80=99t look quite right.
>=20
>=20
> > On 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.
> >
> >
> >> 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 =
<http://www.team.net/donate.html>
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> Unsubscribe/Manage: =
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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""><div class=3D"">I redid the numbers with the rockers removed, =
with the dial indicator in the cup of the centered pushrod. Measured =
open/close at .050. I set the intake lobe center to 108 using .070=E2=80=9D=
before the maximum lift reading (.370) and then got these =
numbers: </div><div class=3D"">Intake opens (.050=E2=80=9D) at 28 =
BTC</div><div class=3D"">Closes (.050=E2=80=9D) at 66 ABC</div><div =
class=3D"">Exhaust opens (.050=E2=80=9D) at 62 BBC</div><div =
class=3D"">exhaust closes (.050=E2=80=9D) 33 BTC</div><div class=3D""><br =
class=3D""></div><div class=3D"">Calculated: </div><div class=3D"">61=
degree overlap</div><div class=3D"">274 duration intake</div><div =
class=3D"">275 duration exhaust</div><div class=3D"">106.75 lobe =
separation</div><div class=3D"">Intake lobe center 109</div><div =
class=3D"">exhaust LC 104.5</div><div class=3D""><br class=3D""></div><div=
class=3D"">the calculated intake lobe center using 050=E2=80=9D from =
open/close is a degree more than the measured using .070=E2=80=9D before =
max lift. seems odd, but it's been a long day staring at little numbers. =
At least it=E2=80=99s starting to look something like a =
cam. </div><div class=3D""><br class=3D""></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div class=3D""><br =
class=3D""></div><br class=3D""><div><blockquote type=3D"cite" =
class=3D""><div class=3D"">On Jun 14, 2016, at 4:19 PM, Kas Kastner =
<<a href=3D"mailto:kaskastner@gmail.com"; =
class=3D"">kaskastner@gmail.com</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D"">And at what clearance are you getting these numbers? =
I've a bunch of cam data I can check against and maybe assist here. Are =
you taking the checking clearance of about.016 or at .050?</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 11:12 =
AM, Bill Babcock <span dir=3D"ltr" class=3D""><<a =
href=3D"mailto:ponobill@gmail.com"; target=3D"_blank" =
class=3D"">ponobill@gmail.com</a>></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">I set it up like a =
Tiltech 298DX and got:<br class=3D"">
Intake<br class=3D"">
45 BTC<br class=3D"">
71 ABC<br class=3D"">
Exhaust<br class=3D"">
82 ABC<br class=3D"">
35 ATC<br class=3D"">
<br class=3D"">
Intake duration =3D 296<br class=3D"">
Exhaust duration 297<br class=3D"">
Intake lobe center 103 ADC<br class=3D"">
Exhaust LC 113.5 BTC<br class=3D"">
Lobe sep 108.3<br class=3D"">
Overlap 80<br class=3D"">
<br class=3D"">
Still doesn=E2=80=99t look quite right.<br class=3D"">
<br class=3D"">
<br class=3D"">
> On Jun 14, 2016, at 10:46 AM, Bill Babcock <<a =
href=3D"mailto:ponobill@gmail.com"; class=3D"">ponobill@gmail.com</a>> =
wrote:<br class=3D"">
><br class=3D"">
> 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"">
>> On Jun 14, 2016, at 10:40 AM, Bill Babcock <<a =
href=3D"mailto:ponobill@gmail.com"; class=3D"">ponobill@gmail.com</a>> =
wrote:<br class=3D"">
>><br class=3D"">
>> Oh, and the lift is .372<br class=3D"">
>><br class=3D"">
>><br class=3D"">
>>> On Jun 14, 2016, at 10:11 AM, Bill Babcock <<a =
href=3D"mailto:ponobill@gmail.com"; class=3D"">ponobill@gmail.com</a>> =
wrote:<br class=3D"">
>>><br class=3D"">
>>> 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.<br class=3D"">
>>><br class=3D"">
>>> I ballparked where I think the cam might want to be and got =
this for measurements:<br class=3D"">
>>><br class=3D"">
>>> 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"">
>>> Intake open .033 @ 36 BTC<br class=3D"">
>>> Intaake close .033=E2=80=9D @ 76 ABC<br class=3D"">
>>> Exhaust open .033=E2=80=9D @ 76 ABC<br class=3D"">
>>> Exhaust close .033=E2=80=9D @ 42 ATC<br class=3D"">
>>><br class=3D"">
>>> By my calculations that gives:<br class=3D"">
>>> Intake duration 292.0 degrees<br class=3D"">
>>> Exhaust duration 298 degrees<br class=3D"">
>>> Intake lobe center 110.0 ATC<br class=3D"">
>>> Exhaust lobe center 107 BTC<br class=3D"">
>>> Overlap 78<br class=3D"">
>>> Lobe separation angle 108.5<br class=3D"">
>>><br class=3D"">
>>> 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"">
>>><br class=3D"">
>>> What cam is this?<br class=3D"">
>>> Where should it be set?<br class=3D"">
>>> How much advance?<br class=3D"">
>><br class=3D"">
><br class=3D"">
<br class=3D"">
_______________________________________________<br class=3D"">
<a href=3D"mailto:fot@autox.team.net"; class=3D"">fot@autox.team.net</a><br=
class=3D"">
<br class=3D"">
<a href=3D"http://www.fot-racing.com/"; target=3D"_blank" =
rel=3D"noreferrer" class=3D"">http://www.fot-racing.com</a><br class=3D"">=
<br class=3D"">
rel=3D"noreferrer" class=3D"">http://www.team.net/donate.html</a><br =
class=3D"">
Archive: <a href=3D"http://www.team.net/archive"; target=3D"_blank" =
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Forums: <a href=3D"http://www.team.net/forums"; target=3D"_blank" =
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href=3D"http://autox.team.net/mailman/options/fot/kaskastner@gmail.com"; =
target=3D"_blank" rel=3D"noreferrer" =
class=3D"">http://autox.team.net/mailman/options/fot/kaskastner@gmail.com<=
/a><br class=3D"">
<br class=3D"">
<br class=3D"">
</blockquote></div><br class=3D""></div>
</div></blockquote></div><br class=3D""></body></html>=
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