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I=E2=80=99m using dual 1 1/4=E2=80=9D SU carbs. The front carb has a =
vacuum connection right at the butterfly that pulls no vacuum at idle =
but 9 psi at > 2000 rpm when the butterfly opens.
> On Jan 11, 2021, at 12:03 PM, John Innis <jdinnis@gmail.com> wrote:
>=20
> 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. =20
>=20
> On Mon, Jan 11, 2021 at 12:34 PM Bud Rolofson <levilevi@comcast.net =
> Listerati,
>=20
> 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.
>=20
> 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.
>=20
> 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.
>=20
> Two questions:
>=20
> Should 9 psi be enough for the vacuum advance to work properly? I =
couldn=E2=80=99t find specs for vacuum advances.
>=20
> If the vernier knob isn=E2=80=99t moving then is the vacuum advance =
not working or the centrifugal weights not moving? Or maybe both?
>=20
> Thanks
> Bud=20
>=20
> Extreme Parts Racing (more than just a haircut)
>=20
> 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=20
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>=20
>=20
> Donate: http://www.team.net/donate.html =
<http://www.team.net/donate.html>
> Archive: http://www.team.net/pipermail/triumphs =
<http://www.team.net/pipermail/triumphs> http://www.team.net/archive =
<http://www.team.net/archive>
>=20
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.com =
<http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.com>
>=20
>=20
> --=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
Bud Rolofson
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=20
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
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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"">I=E2=80=99m using dual 1 1/4=E2=80=9D SU carbs. The front =
carb has a vacuum connection right at the butterfly that pulls no vacuum =
at idle but 9 psi at > 2000 rpm when the butterfly opens.<div =
class=3D""><br class=3D""></div><div class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Jan 11, 2021, at 12:03 PM, John Innis <<a =
href=3D"mailto:jdinnis@gmail.com"; class=3D"">jdinnis@gmail.com</a>> =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
dir=3D"ltr" class=3D"">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. <br class=3D""></div><br class=3D""><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"; =
class=3D"">levilevi@comcast.net</a>> wrote:<br =
class=3D""></div><blockquote 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 class=3D"">
<br class=3D"">
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.<br class=3D"">
<br class=3D"">
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.<br class=3D"">
<br class=3D"">
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 class=3D"">
<br class=3D"">
Two questions:<br class=3D"">
<br class=3D"">
Should 9 psi be enough for the vacuum advance to work properly? I =
couldn=E2=80=99t find specs for vacuum advances.<br class=3D"">
<br class=3D"">
If the vernier knob isn=E2=80=99t moving then is the vacuum advance not =
working or the centrifugal weights not moving? Or maybe both?<br =
class=3D"">
<br class=3D"">
Thanks<br class=3D"">
Bud <br class=3D"">
<br class=3D"">
Extreme Parts Racing (more than just a haircut)<br class=3D"">
<br class=3D"">
71TR6 CC57365 (Good 6)<br class=3D"">
71 Spitfire MK IV Race Car #3<br class=3D"">
69 Spitfire MK III (back up FE engine/dinghy car)<br class=3D"">
93 Minnie Winnie Race Support Vehicle <br class=3D"">
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)<br =
class=3D"">
<br class=3D"">
** <a href=3D"mailto:triumphs@autox.team.net"; target=3D"_blank" =
class=3D"">triumphs@autox.team.net</a> **<br class=3D"">
<br class=3D"">
target=3D"_blank" class=3D"">http://www.team.net/donate.html</a><br =
class=3D"">
Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; =
rel=3D"noreferrer" target=3D"_blank" =
class=3D"">http://www.team.net/pipermail/triumphs</a> <a =
href=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=3D"_blank" =
class=3D"">http://www.team.net/archive</a><br class=3D"">
<br class=3D"">
href=3D"http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.com"; =
rel=3D"noreferrer" target=3D"_blank" =
class=3D"">http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.co=
m</a><br class=3D"">
</blockquote></div><br clear=3D"all" class=3D""><br class=3D"">-- <br =
class=3D""><div dir=3D"ltr" =
class=3D"gmail_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 class=3D"">=3D =
Never offend people with style when you =3D<br class=3D"">=3D =
can offend with substance --- Sam Brown =3D<br =
class=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</div>
</div></blockquote></div><br class=3D""><div class=3D"">
Bud Rolofson<br class=3D""><br class=3D"">Extreme Parts =
Racing (more than just a haircut)<br class=3D""><br class=3D"">71TR6 =
CC57365 (Good 6)<br class=3D"">71 Spitfire MK IV Race Car =
#3<br class=3D"">69 Spitfire MK III (back up FE engine/dinghy =
car)<br class=3D"">93 Minnie Winnie Race Support Vehicle <br =
class=3D"">77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph =
Pit Bike)
</div>
<br class=3D""></div></body></html>=
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Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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