[TPR] Timing adjustments

[Asa Jay Laughton]

Alright, that makes some sense.  I was using some other method tonight 
and I think it was leading me astray, as can happen easily because I 
don't do this very often anymore.

Asa  Jay

Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com
http://www.teampanteraracing.com
http://facebook.com/racingagainstautism


On 9/1/2015 9:18 PM, John wrote:
> Asa, remove and plug the intake vac port. Set timing at 10 before at idle, run up to 3500 rpm and look at total "mechanical" advance. Should be about 32-35 ish. Don't mix vacuum advance and mechanical advance. When the mechanical vacuum is set you can worry about vacuum advance. All is different at high rpm under load rather than sitting in the garage. At high rpm under load the intake vacuum is very different than sitting still. Then look at the manual on you distributor for setting vac. JB
>
> Sent from my iPad
>
>> On Sep 1, 2015, at 9:09 PM, Asa Jay Laughton via TPR<tpr at teampanteraracing.com>  wrote:
>>
>> Alright you gear heads, I think I have a problem with timing.
>>
>> I have a dual port (advance/retard) vacuum advance on a stock distributor with Pertronix Ignitor III ignition.
>> Ported vacuum goes to the advance and manifold vacuum goes to the retard.  I don't have the instruction handy but that's how I recall it was supposed to be hooked up.
>>
>> Tonight when tuning, I had 45 degrees of advance at 3,500 rpm.  That's way too much, but at idle, around 600 rpm, I had zero.  This is with all vacuum lines hooked up.  Therefore it appears I'm getting 45 degrees of total movement out of my distributor advance mechanisms (mechanical presumably the only thing affecting top end, but wait).
>>
>> If I unhook the ported vacuum to the advance portion of the distributor, I get way less than 45 degrees at 3,500 rpm.  So now I'm a little confused.
>>
>> The vacuum advance is adjustable, but I've lost my cheat sheet on what to do when what happens; which way to turn for what symptom.
>>
>> I dialed the distributor back until I got about 34 degrees at 3,500 rpm to be safe, and then adjusted the mixture on the carb to get about 14.2 on the A/F meter.  But now that give me about 10 degree after TDC at idle, which just seems wrong.
>>
>> I could use a little brainstorming here to help with timing.  I'm done for tonight but will attack it again tomorrow if I get time, otherwise it might have to wait until Friday or this weekend.<sigh>
>>
>> Thank you,
>> Asa  Jay
>>
>> -- 
>> Asa Jay Laughton - W7TSC, MSgt, USAFR, Retired
>> &   Shelley Marie
>> Spokane, WA
>> ******************************
>> http://www.racingagainstautism.com
>> http://www.teampanteraracing.com
>> http://facebook.com/racingagainstautism
>>
>>
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