--===============5681340591058432791==
--0000000000002000ca05b8a4927e
Content-Transfer-Encoding: quoted-printable
What carb are you using and where on the carb is the vacuum line
connected? DGV's are notorious for this, because carb vacuum line is NOT a
manifold vacuum source, it is a venturi vacuum source.
On Mon, Jan 11, 2021 at 12:34 PM Bud Rolofson <levilevi@comcast.net> wrote:
> Listerati,
>
> I=E2=80=99m trouble shooting a overheating problem at highway speeds (65-=
70mph)
> with my 69 Spitfire. Temp gage goes to red at higher speeds but then
> immediately cools off when idling.
>
> I suspect I have a bad or weaken vacuum advance on my Spitfire=E2=80=99s =
delco
> remy (friggin spell check made me type that over and over) distributor. I
> tested the vacuum line from the carb and it gets to 9 psi where the line
> connects to the vacuum advance when the engine is at 2500-3000 RPM.
>
> The problem is there is no movement to advance the timing that I can see
> by watching the vernier advance knob, it does not move at 2500-3000 rpm.
>
> Two questions:
>
> Should 9 psi be enough for the vacuum advance to work properly? I
> couldn=E2=80=99t find specs for vacuum advances.
>
> If the vernier knob isn=E2=80=99t moving then is the vacuum advance not w=
orking or
> the centrifugal weights not moving? Or maybe both?
>
> Thanks
> Bud
>
> Extreme Parts Racing (more than just a haircut)
>
> 71TR6 CC57365 (Good 6)
> 71 Spitfire MK IV Race Car #3
> 69 Spitfire MK III (back up FE engine/dinghy car)
> 93 Minnie Winnie Race Support Vehicle
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/pipermail/triumphs
> http://www.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.com
>
--=20
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
=3D Never offend people with style when you =3D
=3D can offend with substance --- Sam Brown =3D
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
--0000000000002000ca05b8a4927e
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">What carb are you using and where on the carb is the vacuu=
m line connected?=C2=A0 DGV's are notorious for this, because carb vacu=
um line is NOT a manifold vacuum source, it is a venturi vacuum source. =C2=
=A0<br></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail=
_attr">On Mon, Jan 11, 2021 at 12:34 PM Bud Rolofson <<a href=3D"mailto:=
levilevi@comcast.net">levilevi@comcast.net</a>> wrote:<br></div><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px=
solid rgb(204,204,204);padding-left:1ex">Listerati,<br>
<br>
I=E2=80=99m trouble shooting a overheating problem at highway speeds (65-70=
mph) with my 69 Spitfire. Temp gage goes to red at higher speeds but then i=
mmediately cools off when idling.<br>
<br>
I suspect I have a bad or weaken vacuum advance on my Spitfire=E2=80=99s de=
lco remy (friggin spell check made me type that over and over) distributor.=
I tested the vacuum line from the carb and it gets to 9 psi where the line=
connects to the vacuum advance when the engine is at 2500-3000 RPM.<br>
<br>
The problem is there is no movement to advance the timing that I can see by=
watching the vernier advance knob, it does not move at 2500-3000 rpm.<br>
<br>
Two questions:<br>
<br>
Should 9 psi be enough for the vacuum advance to work properly?=C2=A0 I cou=
ldn=E2=80=99t find specs for vacuum advances.<br>
<br>
If the vernier knob isn=E2=80=99t moving then is the vacuum advance not wor=
king or the centrifugal weights not moving? Or maybe both?<br>
<br>
Thanks<br>
Bud <br>
<br>
Extreme Parts Racing (more than just a haircut)<br>
<br>
71TR6 CC57365 (Good 6)<br>
71 Spitfire MK IV Race Car #3<br>
69 Spitfire MK III (back up FE engine/dinghy car)<br>
93 Minnie Winnie Race Support Vehicle <br>
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)<br>
<br>
** <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank">triumphs@au=
tox.team.net</a> **<br>
<br>
et=3D"_blank">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; rel=3D"noreferr=
er" target=3D"_blank">http://www.team.net/pipermail/triumphs</a>=C2=A0 <a h=
ref=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=3D"_blank">ht=
tp://www.team.net/archive</a><br>
<br>
hs/jdinnis@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.tea=
m.net/mailman/options/triumphs/jdinnis@gmail.com</a><br>
</blockquote></div><br clear=3D"all"><br>-- <br><div dir=3D"ltr" class=3D"g=
mail_signature">=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=3D Never offend people with =
style when you=C2=A0=C2=A0 =3D<br>=3D can offend with substance --- Sam Bro=
wn=C2=A0 =3D<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
--0000000000002000ca05b8a4927e--
--===============5681340591058432791==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
--===============5681340591058432791==--
|