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Why would they be? The lobes for #1 and #4 should be 180 degrees apart as
should the lobes for #2 and #3.
If they weren't you would have a very odd sounding and rough idle.
If you have ever listened to a air cooled VW motor, the source of their
funny sounding idle is they fire one cylinder (#3) a bit retarded so it
runs just a bit cooler as the oil cooler is right on top of the #3 cylinder=
.
But like I said, feel free to pull your valve cover and verify what I
said. This is the internet, for all you know, I am an 16 year old red head
stringing you along.
Rick
On Mon, May 18, 2015 at 9:00 PM, Clayton Kirkwood via Mgs <
mgs@autox.team.net> wrote:
> Thanks but it was the best word that came to mind at the time. I think yo=
u
> understand what I was after. So, several degrees either side won=E2=80=99=
t matter
> is what you=E2=80=99re saying. I was fairly certain that was true, howeve=
r, aren=E2=80=99t
> the lobes of intake on 1 and out on 8 slightly shifted on the cam?
>
>
>
> TIA,
>
>
>
> Clayton
>
>
>
> *From:* Richard Ewald [mailto:richard.ewald@gmail.com]
> *Sent:* Monday, May 18, 2015 8:37 PM
> *To:* crk@godblessthe.us
> *Cc:* <mgacars@yahoogroups.com>; <mgs@autox.team.net>
> *Subject:* Re: [Mgs] tappet question
>
>
>
> Houston we have a problem with terminology here.
>
> TDC and BDC refer to the position of the piston in the bore, or in the
> firing stroke. Period.
>
> Piston at the exact top of its stroke? The piston is at TDC. At the exac=
t
> bottom of its stroke? BDC.
>
> #1 at the top of its stroke on compression? The engine is at TDC.
>
> What you are referring to is the valve being on the lobe or the heel of
> the cam.
>
> If you doubt that when #s valves 1 & 3 are on the top of the lobe that
> valves 6 & 8 are fully on the heel feel free to rotate the engine several
> degrees one way or the other and see if the gap gets bigger (it won't)
>
> This is because a camshaft is a circle (base circle) with a bump on one
> side. Anywhere on the heel is going to give you the same clearance.
>
> There are even some engines that instruct you to put the engine @ TDC #1
> adjust half the valves then rotate the engine 360 degrees and then adjust
> the other half.
>
> Rick
>
>
>
> Sent from my iPhone
>
>
> On May 18, 2015, at 10:03, Clayton Kirkwood via Mgs <mgs@autox.team.net>
> wrote:
>
> Regarding Rule of Nine, I understand having 8 all the way up to set 1. Bu=
t
> there is a significant rotation between =E2=80=9Creal close to the top=E2=
=80=9D in front
> of, and after TDC. This can be seen with rotation the engine and seeing
> very little to no movement. Also, if I am not mistaken 8 TDC is not
> perfectly in line with BDC of 1; there is a bias. This means that when 8 =
is
> TDC, 1 is not absolutely BDC ready for measurement. So the question is, h=
ow
> do you ensure, with all of that slop, that you truly have BDC?
>
>
>
> TIA,
>
>
>
> Clayton
>
>
>
>
>
>
> _______________________________________________
>
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe:
> http://autox.team.net/mailman/options/mgs/richard.ewald@gmail.com
>
>
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<div dir=3D"ltr">Why would they be?=C2=A0 The lobes for #1 and #4 should be=
180 degrees apart as should the lobes for #2 =C2=A0and #3.<div>If they wer=
en't you would have a very odd sounding and rough idle.</div><div>If yo=
u have ever listened to a air cooled VW motor, the source of their funny so=
unding idle is they fire one cylinder (#3) a bit retarded so it runs just a=
bit cooler as the oil cooler is right on top of the #3 cylinder.</div><div=
>But like I said, feel free to pull your valve cover and verify what I said=
.=C2=A0 This is the internet, for all you know, I am an 16 year old red hea=
d stringing you along.</div><div>Rick</div></div><div class=3D"gmail_extra"=
><br><div class=3D"gmail_quote">On Mon, May 18, 2015 at 9:00 PM, Clayton Ki=
rkwood via Mgs <span dir=3D"ltr"><<a href=3D"mailto:mgs@autox.team.net"; =
target=3D"_blank">mgs@autox.team.net</a>></span> wrote:<br><blockquote c=
lass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;=
padding-left:1ex"><div lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72"><d=
iv><p class=3D"MsoNormal"><span style=3D"color:#1f497d">Thanks but it was t=
he best word that came to mind at the time. I think you understand what I w=
as after. So, several degrees either side won=E2=80=99t matter is what you=
=E2=80=99re saying. I was fairly certain that was true, however, aren=E2=80=
=99t the lobes of intake on 1 and out on 8 slightly shifted on the cam? <u>=
</u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:#1f497d">=
<u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:=
#1f497d">TIA,<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D=
"color:#1f497d"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span=
style=3D"color:#1f497d">Clayton<u></u><u></u></span></p><p class=3D"MsoNor=
mal"><span style=3D"color:#1f497d"><u></u>=C2=A0<u></u></span></p><div><div=
style=3D"border:none;border-top:solid #e1e1e1 1.0pt;padding:3.0pt 0in 0in =
0in"><p class=3D"MsoNormal"><b>From:</b> Richard Ewald [mailto:<a href=3D"m=
ailto:richard.ewald@gmail.com" target=3D"_blank">richard.ewald@gmail.com</a=
>] <br><b>Sent:</b> Monday, May 18, 2015 8:37 PM<br><b>To:</b> <a href=3D"m=
ailto:crk@godblessthe.us" target=3D"_blank">crk@godblessthe.us</a><br><b>Cc=
:</b> <<a href=3D"mailto:mgacars@yahoogroups.com"; target=3D"_blank">mgac=
ars@yahoogroups.com</a>>; <<a href=3D"mailto:mgs@autox.team.net"; targ=
et=3D"_blank">mgs@autox.team.net</a>><span class=3D""><br><b>Subject:</b=
> Re: [Mgs] tappet question<u></u><u></u></span></p></div></div><p class=3D=
"MsoNormal"><u></u>=C2=A0<u></u></p><div><p class=3D"MsoNormal">Houston we =
have a problem with terminology here.=C2=A0<span style=3D"font-size:12.0pt"=
><u></u><u></u></span></p></div><div><div class=3D"h5"><div><p class=3D"Mso=
Normal">TDC and BDC refer to the position of the piston in the bore, or in =
the firing stroke. Period.=C2=A0<u></u><u></u></p></div><div><p class=3D"Ms=
oNormal">Piston at the exact top of its stroke?=C2=A0 The piston is at TDC.=
At the exact bottom of its stroke? BDC.=C2=A0<u></u><u></u></p></div><div>=
<p class=3D"MsoNormal">#1 at the top of its stroke on compression?=C2=A0 Th=
e engine is at TDC.=C2=A0<u></u><u></u></p></div><div><p class=3D"MsoNormal=
">What you are referring to is the valve being on the lobe or the heel of t=
he cam.=C2=A0<u></u><u></u></p></div><div><p class=3D"MsoNormal">If you dou=
bt that when #s valves 1 & 3 are on the top of the lobe that valves 6 &=
amp; 8 are fully on the heel feel free to rotate the engine several degrees=
one way or the other and see if the gap gets bigger (it won't)=C2=A0<u=
></u><u></u></p></div><div><p class=3D"MsoNormal">This is because a camshaf=
t is a circle (base circle) with a bump on one side. Anywhere on the heel i=
s going to give you the same clearance.=C2=A0<u></u><u></u></p></div><div><=
p class=3D"MsoNormal">There are even some engines that instruct you to put =
the engine @ TDC #1 adjust half the valves then rotate the engine 360 degre=
es and then adjust the other half.=C2=A0<u></u><u></u></p></div><div><p cla=
ss=3D"MsoNormal">Rick<u></u><u></u></p></div><div><p class=3D"MsoNormal"><b=
r><br>Sent from my iPhone<u></u><u></u></p></div><div><p class=3D"MsoNormal=
" style=3D"margin-bottom:12.0pt"><br>On May 18, 2015, at 10:03, Clayton Kir=
kwood via Mgs <<a href=3D"mailto:mgs@autox.team.net"; target=3D"_blank">m=
gs@autox.team.net</a>> wrote:<u></u><u></u></p></div><blockquote style=
=3D"margin-top:5.0pt;margin-bottom:5.0pt"><p class=3D"MsoNormal"><span styl=
e=3D"color:#1f497d">Regarding Rule of Nine, I understand having 8 all the w=
ay up to set 1. But there is a significant rotation between =E2=80=9Creal c=
lose to the top=E2=80=9D in front of, and after TDC. This can be seen with =
rotation the engine and seeing very little to no movement. Also, if I am no=
t mistaken 8 TDC is not perfectly in line with BDC of 1; there is a bias. T=
his means that when 8 is TDC, 1 is not absolutely BDC ready for measurement=
. So the question is, how do you ensure, with all of that slop, that you tr=
uly have BDC?</span><u></u><u></u></p><p class=3D"MsoNormal"><span style=3D=
"color:#1f497d">=C2=A0</span><u></u><u></u></p><p class=3D"MsoNormal"><span=
style=3D"color:#1f497d">TIA,</span><u></u><u></u></p><p class=3D"MsoNormal=
"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u></u></p><p class=3D"=
MsoNormal"><span style=3D"color:#1f497d">Clayton</span><u></u><u></u></p><p=
class=3D"MsoNormal"><span style=3D"color:#1f497d">=C2=A0</span><u></u><u><=
/u></p><div><div style=3D"border:none;border-top:solid #e1e1e1 1.0pt;paddin=
g:3.0pt 0in 0in 0in"><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div><=
/div></blockquote></div></div></div></div><br>_____________________________=
__________________<br>
<br>
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//www.team.net/donate.html</a><br>
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/richard.ewald@gmail.com</a><br>
<br></blockquote></div><br></div>
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