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ditto on the vac description sounding bass-ackwards.
you want little to no vac adv when accelerating (low manifold vacuum)
and lot on very high manifold vac (cruising/idling)
Vac Adv the vac port is pointing away from the dist body. Vac retard the
port is on the dist side of the vac assy.
On the heat... VERY common for Spit engines to end up with an air bubble
trapped in the head. Sounds odd... but park your car on a very (VERY)
steep hill or up on high ramps.
check the rad fluid level. Put the cap back on and let it warm up.
(thermostat opens) Let it cool enough to recheck your rad fluid level.
...betting you'll see the level is lower as the air in the head moves to
the higher rad upper tank.
It's not so much that the head is above the rad as it is the passage
ways for the air to escape are below where air can get trapped.
btdt.
ptegler
On 1/11/2021 8:01 PM, John Innis wrote:
> That does not sound right to me, normally you expect vacuum to be
> HIGHEST at idle and fall off as RPM's increase. Do you know which
> model of the Delco distributor you have? IIRC there was one that had
> a vacuum retard, instead of advance.
> WRT your overheating, check your fan clutch. That sounds like it is
> not getting enough air.
>
>
> On Mon, Jan 11, 2021 at 2:03 PM Bud Rolofson <levilevi@comcast.net
>
> Iâ??m using dual 1 1/4â?? 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
>>
>> 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
>>
>> Listerati,
>>
>> Iâ??m 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
>> Spitfireâ??s 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 couldnâ??t find specs for vacuum advances.
>>
>> If the vernier knob isnâ??t moving then is the vacuum advance
>> not working 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)
>>
>>
>> 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>
>>
>> Unsubscribe/Manage:
>> http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.com
>> <http://autox.team.net/mailman/options/triumphs/jdinnis@gmail.com>
>>
>>
>>
>> --
>> =================================
>> = Never offend people with style when you  =
>> = can offend with substance --- Sam Brown =
>> =================================
>
> 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
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
>
>
> --
> =================================
> = Never offend people with style when you  =
> = can offend with substance --- Sam Brown =
> =================================
>
> ** 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/ptegler@verizon.net
--
Paul Tegler
ptegler@verizon.net www.teglerizer.com
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<p>ditto on the vac description sounding bass-ackwards.<br>
you want little to no vac adv when accelerating (low manifold
vacuum) and lot on very high manifold vac (cruising/idling)<br>
Vac Adv the vac port is pointing away from the dist body. Vac
retard the port is on the dist side of the vac assy.<br>
</p>
<p>On the heat... VERY common for Spit engines to end up with an air
bubble trapped in the head. Sounds odd... but park your car on a
very (VERY) steep hill or up on high ramps.<br>
check the rad fluid level. Put the cap back on and let it warm up.
(thermostat opens) Let it cool enough to recheck your rad fluid
level.<br>
...betting you'll see the level is lower as the air in the head
moves to the higher rad upper tank.<br>
</p>
<p>It's not so much that the head is above the rad as it is the
passage ways for the air to escape are below where air can get
trapped.</p>
<p>btdt.</p>
<p>ptegler<br>
</p>
<div class="moz-cite-prefix">On 1/11/2021 8:01 PM, John Innis wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CANuE7YBhT-fu4MgR-oi4BRMFeJctxkUhuu9s7Lv8eVefF+tTTg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div>That does not sound right to me, normally you expect vacuum
to be HIGHEST at idle and fall off as RPM's increase. Do you
know which model of the Delco distributor you have? IIRC
there was one that had a vacuum retard, instead of advance. <br>
</div>
<div>WRT your overheating, check your fan clutch. That sounds
like it is not getting enough air. <br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jan 11, 2021 at 2:03
PM Bud Rolofson <<a href="mailto:levilevi@comcast.net";
moz-do-not-send="true">levilevi@comcast.net</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="overflow-wrap: break-word;">Iâ??m using dual 1 1/4â??
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><br>
</div>
<div><br>
<div>
<blockquote type="cite">
<div>On Jan 11, 2021, at 12:03 PM, John Innis <<a
href="mailto:jdinnis@gmail.com"; target="_blank"
moz-do-not-send="true">jdinnis@gmail.com</a>>
wrote:</div>
<br>
<div>
<div dir="ltr">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. Â <br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Jan 11,
2021 at 12:34 PM Bud Rolofson <<a
href="mailto:levilevi@comcast.net";
target="_blank"
moz-do-not-send="true">levilevi@comcast.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px
0px 0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">Listerati,<br>
<br>
Iâ??m 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>
<br>
I suspect I have a bad or weaken vacuum advance
on my Spitfireâ??s 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>
<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? I couldnâ??t find specs for vacuum
advances.<br>
<br>
If the vernier knob isnâ??t moving then is the
vacuum advance not working 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="mailto:triumphs@autox.team.net";
target="_blank"
moz-do-not-send="true">triumphs@autox.team.net</a>
**<br>
<br>
Donate: <a
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</blockquote>
</div>
<br clear="all">
<br>
-- <br>
<div dir="ltr">=================================<br>
= Never offend people with style when you  =<br>
= can offend with substance --- Sam Brown =<br>
=================================</div>
</div>
</blockquote>
</div>
<br>
<div>
Bud Rolofson<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)
</div>
<br>
</div>
</div>
</blockquote>
</div>
<br clear="all">
<br>
-- <br>
<div dir="ltr"
class="gmail_signature">=================================<br>
= Never offend people with style when you  =<br>
= can offend with substance --- Sam Brown =<br>
=================================</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">** <a class="moz-txt-link-abbreviated"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/triumphs";>http://www.team.net/pipermail/triumphs</a>
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href="http://www.team.net/archive";>http://www.team.net/archive</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Paul Tegler
<a class="moz-txt-link-abbreviated"
href="mailto:ptegler@verizon.net";>ptegler@verizon.net</a> <a
class="moz-txt-link-abbreviated"
href="http://www.teglerizer.com";>www.teglerizer.com</a></pre>
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