[Mgs] 80 B Timing question

[Paul Root]

Just by-pass the TCSA, go straight from the manifold to the dizzy.

On Sep 20, 2009, at 8:23 PM, Eric Markley wrote:

> Gene,
>
> If the distributor is the original 45DE4 Lucas, it should have a  
> vacuum
> canister attached in front of the amplifier assembly. The Lucas part  
> number
> is 41693 for a Federal spec car and 41695 for a California spec car.  
> There
> is a device that restricts the operation of the vacuum advance to  
> fourth
> gear (o/d) only.
>
> Your advance curve spec was:
> 10 degrees BTDC @ 1500 rpm
> 13 to 17 degrees @ 2000 rpm
> 28 to 32 degrees @ 3500 rpm
> 33 to 37 degrees @ 4500 rpm
>
> The only thing I find in my workshop manuals on the Transmission  
> Controlled
> Spark Advance is a wiring diagram, nothing on how to test operation.  
> I hope
> that others can help.
>
> Good Luck,
>
> Eric
>
>
>
> -----Original Message-----
> From: Eugene Balinski [mailto:eugeneb at nni.com]
> Sent: Sunday, September 20, 2009 8:35 PM
> To: Eric Markley; Eugene Balinski; mgs at autox.team.net
> Subject: Re: [Mgs] 80 B Timing question
>
>
> Eric,
>
> From what I have gathered from the other replies that I
> received, the distributor is working correctly.  Is has a
> mechanical advance vs a vacuum advance.  I don't remember
> timing a mechanical advance disributor before so what I was
> noticing seemed weird, but was in fact, correct.
>
> Thanks for the offer of your help. Now I just have to
> figure out how to test the OD vacuum advance switch.
>
> Regards,
>
>   Gene Balinski
> 80 B
>
>
> On Sun, 20 Sep 2009 19:42:40 -0400
> "Eric Markley" <ericemarkley at bellsouth.net> wrote:
>> Gene,
>>
>> Unless I'm reading your post wrong, it sounds like things
>> are working
>> properly. Is there any other info that you can provide?
>>
>> Eric
>>
>> -----Original Message-----
>> From: mgs-bounces at autox.team.net
>> [mailto:mgs-bounces at autox.team.net]On
>> Behalf Of Eugene Balinski
>> Sent: Saturday, September 19, 2009 11:04 PM
>> To: mgs at autox.team.net
>> Subject: [Mgs] 80 B Timing question
>>
>>
>> All,
>>
>>   Can someone tell me how the distributor in an 80 B
>> with
>> OD works with regard to timing ?  The reason that I ask
>> is
>> that the other day when I was checking the timing with a
>> timing light, I noticed that the timing mark moves as a
>> function of engine speed.  The faster the engine speed,
>> the
>> more advanced the spark. The slower the less advanced.
>> The
>> vacuum advance was disconnected at the time.  This is
>> different from other engines that I have timed where the
>> timing mark is relatively constant with engine speed.
>>  Is
>> the MG distributor normal, or is there something amiss ?
>>
>> Also the MG has the OD advance switch.  Is there any way
>> to
>> check it for proper operation ?
>>
>> Thanks in advance for the help.
>>
>> Safety Fast,
>>
>>   Gene
>>
>> 80 B
>>
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