Anyone got the time! : Classic Mustangs List Archive : Ford First

Anyone got the time! #1
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 15, 1999 06:36 PM Joined 15 years ago 59,279 Posts

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Mail From: Tom Burns (email redacted)

My '67 has a '86 302 HO in it and I just swapped a different intake and
carb on it until I can get my 289 together. However I can't seem to find
the timing for the motor in my books.

I have been trying to get it tuned using a baseline of 18 BTDC, but the
idle is extremely rich. The carb is a 750 Holley manual choke...can't get
much simpler, however I will be damned if I can get it to work! Car starts
and running fine, just really rich.

I am hoping it might be timing related. Would anyone out there happen to
know a good baseline to start or even the actual OEM spec.

Thanks,
-Tom

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Anyone got the time! #2
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 15, 1999 06:52 PM Joined 15 years ago 59,279 Posts

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Mail From: Paul Prince (email redacted)

You might have it jetted to rich...
Paul Prince
1965 Mustang 2+2
1989 Mustang GT Convertible

----- Original Message -----
From: Tom Burns <(email redacted)>
To: <(email redacted)>
Sent: Wednesday, September 15, 1999 7:40 PM
Subject: [CM:18283] Anyone got the time!

> My '67 has a '86 302 HO in it and I just swapped a different intake and
> carb on it until I can get my 289 together. However I can't seem to find
> the timing for the motor in my books.
>
> I have been trying to get it tuned using a baseline of 18 BTDC, but the
> idle is extremely rich. The carb is a 750 Holley manual choke...can't get
> much simpler, however I will be damned if I can get it to work! Car starts
> and running fine, just really rich.
>
> I am hoping it might be timing related. Would anyone out there happen to
> know a good baseline to start or even the actual OEM spec.
>
> Thanks,
> -Tom
>
>
> ------------------------------------------------------------------------
> All the list info you'll ever want: antler.moose.to/~server/cm
>

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Anyone got the time! #3
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 15, 1999 08:48 PM Joined 15 years ago 59,279 Posts

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Mail From: Scott Mckee (email redacted)

Have you thought about a smaller carb? A 750 is a bit large for a 302 unless
you have a cam that requires it. You may get the idle to work but it'll pump
a more gas than what the engine can handle while running.

Scott

Tom Burns wrote:

> My '67 has a '86 302 HO in it and I just swapped a different intake and
> carb on it until I can get my 289 together. However I can't seem to find
> the timing for the motor in my books.
>
> I have been trying to get it tuned using a baseline of 18 BTDC, but the
> idle is extremely rich. The carb is a 750 Holley manual choke...can't get
> much simpler, however I will be damned if I can get it to work! Car starts
> and running fine, just really rich.
>
> I am hoping it might be timing related. Would anyone out there happen to
> know a good baseline to start or even the actual OEM spec.
>
> Thanks,
> -Tom
>
> ------------------------------------------------------------------------
> All the list info you'll ever want: antler.moose.to/~server/cm

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Anyone got the time! #4
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 16, 1999 10:58 AM Joined 15 years ago 59,279 Posts

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Mail From: Rick Larson (email redacted)

Tom,

> I have been trying to get it tuned using a baseline of 18 BTDC, but the
> idle is extremely rich. The carb is a 750 Holley manual choke...can't get
> much simpler, however I will be damned if I can get it to work! Car starts
> and running fine, just really rich.

Assuming the ignition is fine (I'd start at 8 BTDC BTW), check the
primary jets and start trying smaller ones. Try jets three or four
sizes smaller and check the plugs.

rick
--
Rick Larson (email redacted)

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Anyone got the time! #5
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 16, 1999 11:06 AM Joined 15 years ago 59,279 Posts

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Mail From: Tom Burns (email redacted)

I didn't think carbs used the jets at all during idle?

At 01:01 PM 9/16/99 -0300, you wrote:
>Tom,
>
>> I have been trying to get it tuned using a baseline of 18 BTDC, but the
>> idle is extremely rich. The carb is a 750 Holley manual choke...can't get
>> much simpler, however I will be damned if I can get it to work! Car starts
>> and running fine, just really rich.
>
>Assuming the ignition is fine (I'd start at 8 BTDC BTW), check the
>primary jets and start trying smaller ones. Try jets three or four
>sizes smaller and check the plugs.
>
>rick
>--
>Rick Larson (email redacted)
>
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>

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Anyone got the time! #6
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 16, 1999 01:09 PM Joined 15 years ago 59,279 Posts

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Mail From: Christophe SCHWARTZ (email redacted)

I' d also check the power valve. Measure vaccum at idle and meke sure that
you have a PV that is two steps smaller than the vaccum you read. For
example, if the gauge says 11 in.Hg. use a # 95 power valve. It could also
be that the power valve is blown. In that case the car keeps having a rich
idle, even when both idle screws are turned completly inward.

Hope this helps,

(email redacted)
TREVES Automotive Seating Components
Paris, France
GSM : +33 680 891 309

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Anyone got the time! #7
mailbot Mail List Archive Bot ., Online, USA	Topic Creator (OP) Sep 16, 1999 01:22 PM Joined 15 years ago 59,279 Posts

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Mail From: Peterson, Keith (email redacted)

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this format, some or all of this message may not be legible.

------_=_NextPart_001_01BF0070.75B3577E
Content-Type: text/plain

The idle circuit may take fuel through the jets but I believe you are
correct that the jets will not effect idle - mix/rich/lean - much, if at
all.

The most frequent cause to rich idle is float level. It could also be the
combination of several very small problems, however...

- too high and the fuel flows too easily through the circuit. This sets up
a fuel loading, or wet looking and flooding situation.

- too low and the circuit will fight to get the fuel. This sets up a lean
miss that may show as too rich when looking at other indicators. It may also
cause a wet, flooded looking situation when the fuel is not being drawn
through the system (carb and/or intake) properly. It is possible to have
fuel fouled plugs with a too lean situation. This is from the miss fire of
one (or several) cycles of that cylinder and then a firing on one cycle that
is fuel overloaded due to the miss fired cycles.

I have worked on both types of problems - cars and motorcycles.

Keith, '71

> ----------
> From: Tom Burns[SMTPemail redacted)]
> I didn't think carbs used the jets at all during idle?
>
> At 01:01 PM 9/16/99 -0300, you wrote:
> >Tom,
> >> I have been trying to get it tuned using a baseline of 18 BTDC, but the
> >> idle is extremely rich. The carb is a 750 Holley manual choke...can't
> get
> >> much simpler, however I will be damned if I can get it to work! Car
> starts
> >> and running fine, just really rich.
> >
> >Assuming the ignition is fine (I'd start at 8 BTDC BTW), check the
> >primary jets and start trying smaller ones. Try jets three or four
> >sizes smaller and check the plugs.
> >rick
> >Rick Larson (email redacted)

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The idle circuit may take =
fuel through the jets but I believe you are correct that the jets will =
not effect idle - mix/rich/lean - much, if at all. 

The most frequent cause to =
rich idle is float level. It could also be the combination of several =
very small problems, however...

 - too high and the fuel =
flows too easily through the circuit. This sets up a fuel loading, or =
wet looking and flooding situation.

 - too low and the =
circuit will fight to get the fuel. This sets up a lean miss that may =
show as too rich when looking at other indicators. It may also cause a =
wet, flooded looking situation when the fuel is not being drawn through =
the system (carb and/or intake) properly. It is possible to have fuel =
fouled plugs with a too lean situation. This is from the miss fire of =
one (or several) cycles of that cylinder and then a firing on one cycle =
that is fuel overloaded due to the miss fired cycles.

I have worked on both types =
of problems - cars and motorcycles.


Keith, '71

 

----------
 From:   =
Tom =
Burns[SMTP sad smiley

email redacted)]
 I didn't think carbs used the jets at =
all during idle?


At 01:01 PM 9/16/99 -0300, you =
wrote:
 >Tom,
 >> I have been trying to get it =
tuned using a baseline of 18 BTDC, but the
 >> idle is extremely rich. The =
carb is a 750 Holley manual choke...can't get
 >> much simpler, however I will =
be damned if I can get it to work! Car starts
 >> and running fine, just =
really rich.
 >
 >Assuming the ignition is fine =
(I'd start at 8 BTDC BTW), check the
 >primary jets and start trying =
smaller ones.  Try jets three or four
 >sizes smaller and check the =
plugs.
 >rick
 >Rick =
Larson           =
            =
  (email redacted)


</BODY>
</HTML>
------_=_NextPart_001_01BF0070.75B3577E--

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